Media Library API

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Messages sent to your plugin's MessageProc

// return values from the winampUninstallPlugin(HINSTANCE hdll, HWND parent, int param)
// which determine if we can uninstall the plugin immediately or on winamp restart
//
// uninstall support was added from 5.0+ and uninstall now support from 5.5+
// it is down to you to ensure that if uninstall now is returned that it will not cause a crash
// (ie don't use if you've been subclassing the main window)
#define ML_PLUGIN_UNINSTALL_NOW    0x1
#define ML_PLUGIN_UNINSTALL_REBOOT 0x0
 
// messages your plugin may receive on MessageProc()
 
#define ML_MSG_TREE_BEGIN 0x100
  #define ML_MSG_TREE_ONCREATEVIEW 0x100 // param1 = param of tree item, param2 is HWND of parent. return HWND if it is us
 
  #define ML_MSG_TREE_ONCLICK  0x101 // param1 = param of tree item, param2 = action type (below), param3 = HWND of main window
    #define ML_ACTION_RCLICK 0    // return value should be nonzero if ours
    #define ML_ACTION_DBLCLICK 1
    #define ML_ACTION_ENTER 2
		#define ML_ACTION_LCLICK 3
 
  #define ML_MSG_TREE_ONDROPTARGET 0x102 // param1 = param of tree item, param2 = type of drop (ML_TYPE_*), param3 = pointer to data (or NULL if querying).
                                      // return -1 if not allowed, 1 if allowed, or 0 if not our tree item
 
  #define ML_MSG_TREE_ONDRAG 0x103 // param1 = param of tree item, param2 = POINT * to the mouse position, and param3 = (int *) to the type
                                  // set *(int*)param3 to the ML_TYPE you want and return 1, if you support drag&drop, or -1 to prevent d&d.
 
  #define ML_MSG_TREE_ONDROP 0x104 // param1 = param of tree item, param2 = POINT * to the mouse position
                                  // if you support dropping, send the appropriate ML_IPC_HANDLEDROP using SendMessage() and return 1, otherwise return -1.
 
  #define  ML_MSG_TREE_ONKEYDOWN 0x105  // Send when key pressed 
										// param1 = param of tree item;
										// param2 = pointer to NMTVKEYDOWN
										// param3 = tree hwnd
										// return 0 if it's not yours, 1 if it is
 
#define ML_MSG_TREE_END 0x1FF // end of tree specific messages
 
 
#define ML_MSG_ONSENDTOBUILD 0x300 // you get sent this when the sendto menu gets built
// param1 = type of source, param2 param to pass as context to ML_IPC_ADDTOSENDTO
// be sure to return 0 to allow other plugins to add their context menus
 
 
// if your sendto item is selected, you will get this with your param3 == your user32 (preferably some
// unique identifier (like your plugin message proc). See ML_IPC_ADDTOSENDTO
#define ML_MSG_ONSENDTOSELECT 0x301
// param1 = type of source, param2 = data, param3 = user32
 
// return TRUE and do a config dialog using param1 as a HWND parent for this one
#define ML_MSG_CONFIG 0x400

Messages you can send to the Media Library HWND

#define ML_TYPE_UNKNOWN			-1
#define ML_TYPE_ITEMRECORDLIST 0 // if this, cast obj to itemRecordList
#define ML_TYPE_FILENAMES 1 // double NULL terminated char * to files, URLS, or playlists
#define ML_TYPE_STREAMNAMES 2 // double NULL terminated char * to URLS, or playlists ( effectively the same as ML_TYPE_FILENAMES, but not for files)
#define ML_TYPE_CDTRACKS 3 // if this, cast obj to itemRecordList (CD tracks) -- filenames should be cda://<drive letter>,<track index>. artist/album/title might be valid (CDDB)
#define ML_TYPE_QUERYSTRING 4 // char * to a query string
#define ML_TYPE_PLAYLIST 5 // mlPlaylist *
#define ML_TYPE_ITEMRECORDLISTW 6 // if this, cast obj to itemRecordListW
// added from 5.36+
#define ML_TYPE_FILENAMESW 7 // double NULL terminated wchar_t * to files, URLS, or playlists
#define ML_TYPE_STREAMNAMESW 8 // double NULL terminated wchar_t * to URLS, or playlists ( effectively the same as ML_TYPE_FILENAMESW, but not for files)
#define ML_TYPE_PLAYLISTS 9 // mlPlaylist **, null terminated
#define ML_TYPE_TREEITEM 69 // uhh?
 
typedef struct
{
	const wchar_t *filename;
	const wchar_t *title;
	// only fill in the following two if already know.  don't calculate it just for the struct. 
	// put -1 for "don't know"
	int numItems; 
	int length; // in seconds.  
} mlPlaylist;
 
// if you wish to put your tree items under "devices", use this constant for ML_IPC_ADDTREEITEM
#define ML_TREEVIEW_ID_DEVICES 10000
 
 
 
// children communicate back to the media library by SendMessage(plugin.hwndLibraryParent,WM_ML_IPC,param,ML_IPC_X);
#define WM_ML_IPC WM_USER+0x1000
 
 
#define ML_IPC_GETCURRENTVIEW	0x090 // Returns HWND to the currently selected view or NULL if nothing selected or error. (WA 5.22 and higher)
 
 
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Old Tree Item API  (deprecated)
//
#define ML_IPC_ADDTREEITEM		0x0101 // pass mlAddTreeItemStruct as the param
#define ML_IPC_SETTREEITEM		0x0102 // pass mlAddTreeItemStruct with id valid
#define ML_IPC_DELTREEITEM		0x0103 // pass param of tree item to remove
#define ML_IPC_GETCURTREEITEM	0x0104 // returns current tree item param or 0 if none
#define ML_IPC_SETCURTREEITEM	0x0105 // selects the tree item passed, returns 1 if found, 0 if not
#define ML_IPC_GETTREE			0x0106 // returns a HMENU with all the tree items. the caller needs to delete the returned handle! pass mlGetTreeStruct as the param
 
/* deprecated. Use MLTREEITEM instead */
typedef struct {
  INT_PTR parent_id; //0=root, or ML_TREEVIEW_ID_*
  char *title;
  int has_children;
  INT_PTR this_id; //filled in by the library on ML_IPC_ADDTREEITEM
} mlAddTreeItemStruct;
 
typedef struct {
  int item_start;   // TREE_PLAYLISTS, TREE_DEVICES...
  int cmd_offset;   // menu command offset if you need to make a command proxy, 0 otherwise
  int max_numitems; // maximum number of items you wish to insert or -1 for no limit
} mlGetTreeStruct;
 
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/// For Predixis, with Love
/// deprecatded (never use!!!)
///
#define ML_IPC_ADDTREEITEM_EX 0x0111 // pass mlAddTreeItemStructEx as the param
#define ML_IPC_SETTREEITEM_EX 0x0112 // pass mlAddTreeItemStructEx with this_id valid
 
typedef struct {
  INT_PTR parent_id; //0=root, or ML_TREEVIEW_ID_*
  char *title;
  int has_children;
  INT_PTR this_id; //filled in by the library on ML_IPC_ADDTREEITEM
  int imageIndex;  // index of the image you want to be associated with your item
} mlAddTreeItemStructEx;
 
/// deprecatded (never use!!!)
#define ML_IPC_ADDTREEIMAGE 0x110 // adds tree image to the ml. Use mlAddTreeImageStruct as the param.
/// end of predixis special
 
 
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Tree Item API  (starting from 5.3)
//
#define ML_IPC_TREEITEM_GETHANDLE	0x120 // Gives you HANDLE to the item with specified ID in the param
#define ML_IPC_TREEITEM_GETCHILD		0x121 // Returns HANDLE to the child item for the item HANDLE specified as a param. 
#define ML_IPC_TREEITEM_GETNEXT		0x122 // Returns HANDLE to the next item for the item HANDLE specified as a param.
#define ML_IPC_TREEITEM_GETSELECTED	0x123 // Returns HANDLE to selected item.
#define ML_IPC_TREEITEM_GETINFO		0x124 // Pass MLTREEITEMINFO as a param. return TRUE - if ok
#define ML_IPC_TREEITEM_SETINFO		0x125 // Pass MLTREEITEMINFO as a param. return TRUE - if ok
#define ML_IPC_TREEITEM_ADD			0x126 // Adds new item using MLTREEITEM passed as a param
#define ML_IPC_TREEITEM_DELETE		0x127 // Deletes tree item. Pass HANDLE as a param.
#define ML_IPC_TREEITEM_SELECT		0x128 // Selects tree item. Pass HANDLE as a param. 
#define ML_IPC_TREEITEM_GETROOT		0x129 // Gets first item.
#define ML_IPC_TREEITEM_INSERT    0x130 // like ML_IPC_TREEITEM_ADD, but id becomes an "insert after" ID
#define ML_IPC_TREEITEM_GETCHILD_ID		0x131 // Returns ID to the child item for the item ID specified as a param. 
#define ML_IPC_TREEITEM_GETNEXT_ID		0x132 // Returns ID to the next item for the item ID specified as a param.
#define ML_IPC_TREEITEM_ADDW			0x133 // Adds new item using MLTREEITEMW passed as a param
#define ML_IPC_TREEITEM_INSERTW    0x134 // like ML_IPC_TREEITEM_ADDW, but id becomes an "insert after" ID
#define ML_IPC_TREEITEM_SETINFOW    0x135 // Pass MLTREEITEMINFOW as a param. return TRUE - if ok
#define ML_IPC_TREEITEM_GETINFOW		0x136 // Pass MLTREEITEMINFO as a param. return TRUE - if ok
#define MLTI_ROOT			(INT_PTR)TVI_ROOT // can be used in ML_IPC_TREEITEM_GETCHILD
 
typedef struct {
  size_t	size;			// size of this struct
  UINT_PTR	id;				// depends on contxext
  UINT_PTR	parentId;		// 0 = root, or ML_TREEVIEW_ID_*
  char		*title;			// pointer to the buffer contained item name. 
  size_t	titleLen;		// used for GetInfo 
  BOOL		hasChildren;	// TRUE - has children
  int		imageIndex;		// index of the associated image
} MLTREEITEM;
 
typedef struct {
  MLTREEITEM	item;	// item data
  UINT			mask;	// one or more of MLTI_* flags
  UINT_PTR		handle; // Handle to the item. If handle is NULL item->id will be used
} MLTREEITEMINFO;
 
typedef struct {
  size_t	size;			// size of this struct
  UINT_PTR		id;				// depends on context
  UINT_PTR		parentId;		// 0 = root, or ML_TREEVIEW_ID_*
  wchar_t	*title;			// pointer to the buffer contained item name. 
  size_t	titleLen;		// used for GetInfo 
  BOOL		hasChildren;	// TRUE - has children
  int		imageIndex;		// index of the associated image
} MLTREEITEMW;
 
typedef struct {
  MLTREEITEMW	item;	// item data
  UINT			mask;	// one or more of MLTI_* flags
  UINT_PTR		handle; // Handle to the item. If handle is NULL item->id will be used
} MLTREEITEMINFOW;
// Flags that used in the MLTREEITEMINFO struct
#define MLTI_CHILDREN	TVIF_CHILDREN
#define MLTI_IMAGE		TVIF_IMAGE
#define MLTI_TEXT		TVIF_TEXT
#define MLTI_ID			TVIF_PARAM
 
 
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Tree image (starting from 5.3)
//
 
#define ML_IPC_TREEIMAGE_ADD 0x140 // adds tree image to the ml. Use MLTREEIMAGE as the param.
 
typedef struct _COLOR24
{
	unsigned char rgbBlue;
	unsigned char rgbGreen;
	unsigned char rgbRed;
}COLOR24; // color struct 
 
typedef void (*BMPFILTERPROC)(const COLOR24*, const COLOR24*, COLOR24*); // color filter procedure 
// you got two colors: color1 and color2 (usualy BG and FG colors) also you as a third parameter
// you get a pixel color value that you need (can) modify  
 
#define FILTER_NO			((BMPFILTERPROC)NULL)
#define FILTER_DEFAULT1		((BMPFILTERPROC)1)
#define FILTER_DEFAULT2		((BMPFILTERPROC)2)
 
#define MLTREEIMAGE_NONE					0
#define MLTREEIMAGE_DEFAULT					1
#define MLTREEIMAGE_BRANCH					2   // calculates at the time 	
#define MLTREEIMAGE_BRANCH_EXPANDED			3
#define MLTREEIMAGE_BRANCH_COLLAPSED		4
#define MLTREEIMAGE_BRANCH_NOCHILD			5
 
typedef struct {
	HINSTANCE				hinst;					// hInstance
	int				resourceId;				// resource id 
	int				imageIndex;				// set image to specified index (specify -1 to get a new index back)
	BMPFILTERPROC	filterProc;				// pointer to the filter proc to use or one of the FILTER_*
	int				width;					// reserved
	int				height;					// reserved
} MLTREEIMAGE;   // basicly ml will read your reosurce when it will need to create your image
 
#define ML_IPC_NEWPLAYLIST           0x107 // pass hwnd for dialog parent as param
#define ML_IPC_IMPORTPLAYLIST        0x108 // pass hwnd for dialog parent as param
#define ML_IPC_IMPORTCURRENTPLAYLIST 0x109
#define ML_IPC_GETPLAYLISTWND        0x10A
#define ML_IPC_SAVEPLAYLIST          0x10B // pass hwnd for dialog parent as param
#define ML_IPC_OPENPREFS             0x10C
 
#define ML_IPC_PLAY_PLAYLIST 0x010D // plays the playlist pointed to by the tree item passed, returns 1 if found, 0 if not
#define ML_IPC_LOAD_PLAYLIST 0x010E // loads the playlist pointed to by the tree item passed into the playlist editor, returns 1 if found, 0 if not
 
#define ML_IPC_REFRESH_PREFS 0x10F // this doesn't belong in here 
 
 
/** ------------------ 
 ** ml_playlists 
 ** ------------------ */
 
#define PL_FLAG_SHOW 1
#define PL_FLAG_SWITCH 2
#define PL_FLAGS_IMPORT 4 // set to have ml_playlists make a copy (only valid for mlAddPlaylist)
#define PL_FLAG_FILL_FILENAME 8 // only valid for mlMakePlaylist
 
typedef struct 
{
  size_t size;  // size of this struct
	const wchar_t *playlistName; // set to NULL (or empty string) to prompt the user for a name
  const wchar_t *filename;
	int flags; // see PL_FLAG_* above
	// the following two items can be optionally filled in (set to -1 otherwise)
	// if they aren't set, the playlist file will have to be opened and parsed
	// so prepopulating is faster (assuming if you already know the data)
	int numItems; // set to -1 if you don't know. 
	int length; // in seconds, set to -1 if you don't know
} mlAddPlaylist;
 
#define ML_IPC_PLAYLIST_ADD 0x180 // call to add a new playlist file to the Playlists treeview.  pass an mlAddPlaylist *
 
typedef struct 
{
	size_t size;  // size of this struct
	const wchar_t *playlistName; // set to NULL (or empty string) to prompt the user for a name
  int type; //ML_TYPE_ITEMRECORDLIST, etc
  void *data; // object to load
	int flags; // see PL_FLAG_* above
	wchar_t filename[MAX_PATH]; // this will get populated if PL_FLAG_FILL_NAME is set
} mlMakePlaylistV2;
 
// old structure, here to make it easy to do a sizeof() check
typedef struct 
{
	size_t size;  // size of this struct
	const wchar_t *playlistName; // set to NULL (or empty string) to prompt the user for a name
  int type; //ML_TYPE_ITEMRECORDLIST, etc
  void *data; // object to load
	int flags; // see PL_FLAG_* above
} mlMakePlaylist;
 
/* Call to add a new playlist to the Playlists treeview.  
   It will be automatically created based on the data you pass
	 type & data follow the same specifications as send-to, drag-and-drop, etc.
*/
#define ML_IPC_PLAYLIST_MAKE 0x181  // call to create a new playlist in the treeview based on passed information.  pass an mlMakePlaylist *
#define ML_IPC_PLAYLIST_COUNT 0x182
#define ML_IPC_PLAYLIST_INFO 0x183 // pass in the struct below. returns "1" on success and "0" on failure
 
typedef struct
{
	// you fill this in
	size_t size; // size of this struct
	size_t playlistNum; // number of the playlist you want to retrieve (0 index)
	// ml_playlists fills these in
	wchar_t playlistName[128];
	wchar_t filename[MAX_PATH];
	int numItems;
	int length; // in seconds
} mlPlaylistInfo;
 
 
/** ------------------ 
 ** 
 ** ------------------ */
 
#define ML_IPC_GETFILEINFO 0x0200 // pass it a &itemRecord with a valid filename (and all other fields NULL), and it will try to fill in the rest
#define ML_IPC_FREEFILEINFO 0x0201 // pass it a &itemRecord tha twas filled by getfileinfo, it will free the strings it allocated
 
#define ML_IPC_HANDLEDRAG 0x0300 // pass it a &mlDropItemStruct it will handle cursors etc (unless flags has the lowest bit set), and it will set result appropriately:
#define ML_IPC_HANDLEDROP 0x0301 // pass it a &mlDropItemStruct with data on drop:
 
#define ML_IPC_SENDTOWINAMP 0x302 // send with a mlSendToWinampStruct:
typedef struct {
  int type; //ML_TYPE_ITEMRECORDLIST, etc
  void *data; // object to play
 
  int enqueue; // low bit set specifies enqueuing, and second bit NOT set specifies that 
               // the media library should use its default behavior as the user configured it (if 
               // enqueue is the default, the low bit will be flipped by the library)
} mlSendToWinampStruct;
 
 
typedef struct {
  char *desc; // str
  intptr_t context; // context passed by ML_MSG_ONSENDTOBUILD
  intptr_t user32; // use some unique ptr in memory, you will get it back in ML_MSG_ONSENDTOSELECT...
} mlAddToSendToStruct;
#define ML_IPC_ADDTOSENDTO 0x0400
 
typedef struct {
  wchar_t *desc; // str
  intptr_t context; // context passed by ML_MSG_ONSENDTOBUILD
  intptr_t user32; // use some unique ptr in memory, you will get it back in ML_MSG_ONSENDTOSELECT...
} mlAddToSendToStructW;
#define ML_IPC_ADDTOSENDTOW 0x0401 // pass mlAddToSendToStructW
 
// used to make a submenu in sendto
// pass mlAddToSendToStructW, set desc to 0 to start, set valid desc to end
// user32 is unused 
#define ML_IPC_BRANCHSENDTO 0x0402 
 
// follow same rules as ML_IPC_ADDTOSENDTOW, but adds to branch instead of main send-to menu
#define ML_IPC_ADDTOBRANCH 0x403  // pass mlAddToSendToStructW
 
 
 
#define ML_IPC_HOOKTITLE 0x0440 // this is like winamp's IPC_HOOK_TITLES... :) param1 is waHookTitleStruct
#define ML_IPC_HOOKEXTINFO 0x441 // called on IPC_GET_EXTENDED_FILE_INFO_HOOKABLE, param1 is extendedFileInfoStruct
#define ML_IPC_HOOKEXTINFOW 0x442 // called on IPC_GET_EXTENDED_FILE_INFO_HOOKABLEW, param1 is extendedFileInfoStructW
#define ML_IPC_HOOKTITLEW 0x0443 // this is like winamp's IPC_HOOK_TITLESW... :) param1 is waHookTitleStructW
 
#define ML_HANDLEDRAG_FLAG_NOCURSOR 1
#define ML_HANDLEDRAG_FLAG_NAME 2
 
typedef struct {
  int type; //ML_TYPE_ITEMRECORDLIST, etc
  void *data; // NULL if just querying
 
  int result; // filled in by client: -1 if dont allow, 0 if dont know, 1 if allow.
 
  POINT p; // cursor pos in screen coordinates
  int flags; 
 
  char *name; // only valid if ML_HANDLEDRAG_FLAG_NAME
 
} mlDropItemStruct;
 
 
#define ML_IPC_SKIN_LISTVIEW   0x0500 // pass the hwnd of your listview. returns a handle to use with ML_IPC_UNSKIN_LISTVIEW
#define ML_IPC_UNSKIN_LISTVIEW 0x0501 // pass the handle you got from ML_IPC_SKIN_LISTVIEW
#define ML_IPC_LISTVIEW_UPDATE 0x0502 // pass the handle you got from ML_IPC_SKIN_LISTVIEW
#define ML_IPC_LISTVIEW_DISABLEHSCROLL 0x0503 // pass the handle you got from ML_IPC_SKIN_LISTVIEW
#define ML_IPC_LISTVIEW_DISABLEVSCROLL 0x050A // pass the handle you got from ML_IPC_SKIN_LISTVIEW
#define ML_IPC_LISTVIEW_SHOWSORT		0x0504  // use LV_SKIN_SHOWSORT
#define ML_IPC_LISTVIEW_SORT			0x0505  // use LV_SKIN_SORT
 
typedef struct 
{
	INT_PTR listView;
	BOOL	showSort;
} LV_SKIN_SHOWSORT;
 
typedef struct
{
	INT_PTR listView;
	int		columnIndex;
	BOOL	ascending;
} LV_SKIN_SORT;
 
 
#define ML_IPC_SKIN_COMBOBOX   0x0508 // pass the hwnd of your combobox to skin, returns a ahndle to use with ML_IPC_UNSKIN_COMBOBOX
#define ML_IPC_UNSKIN_COMBOBOX 0x0509 // pass the handle from ML_IPC_SKIN_COMBOBOX
 
#define ML_IPC_SKIN_WADLG_GETFUNC 0x0600 
    // 1: return int (*WADlg_getColor)(int idx); // pass this an index, returns a RGB value (passing 0 or > 3 returns NULL)
    // 2: return int (*WADlg_handleDialogMsgs)(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam); 
    // 3: return void (*WADlg_DrawChildWindowBorders)(HWND hwndDlg, int *tab, int tabsize); // each entry in tab would be the id | DCW_*
    // 32: return void (*childresize_init)(HWND hwndDlg, ChildWndResizeItem *list, int num);
    // 33: return void (*childresize_resize)(HWND hwndDlg, ChildWndResizeItem *list, int num);
    // 66: return (HFONT) font to use for dialog elements, if desired (0 otherwise)
 
// itemRecord type for use with ML_TYPE_ITEMRECORDLIST, as well as many other functions
typedef struct
{
  char *filename;
  char *title;
  char *album;
  char *artist;
  char *comment;
  char *genre;
  int year;
  int track;
  int length;
  char **extended_info;
  // currently defined extended columns (while they are stored internally as integers
  // they are passed using extended_info as strings):
  // use getRecordExtendedItem and setRecordExtendedItem to get/set.
  // for your own internal use, you can set other things, but the following values
  // are what we use at the moment. Note that setting other things will be ignored
  // by ML_IPC_DB*.
  // 
  //"RATING" file rating. can be 1-5, or 0 or empty for undefined
  //"PLAYCOUNT" number of file plays.
  //"LASTPLAY" last time played, in standard time_t format
  //"LASTUPD" last time updated in library, in standard time_t format
  //"FILETIME" last known file time of file, in standard time_t format
  //"FILESIZE" last known file size, in kilobytes.
  //"BITRATE" file bitrate, in kbps
	//"TYPE" - "0" for audio, "1" for video
 
} itemRecord;
 
typedef struct 
{
  itemRecord *Items;
  int Size;
  int Alloc;
} itemRecordList;
 
#include <time.h>
 
typedef struct
{
  wchar_t *filename;
  wchar_t *title;
  wchar_t *album;
  wchar_t *artist;
  wchar_t *comment;
  wchar_t *genre;
	wchar_t *albumartist; 
	wchar_t *replaygain_album_gain; // these are strings rather than float's to differentiate between '0 gain' and 'not defined'
	wchar_t *replaygain_track_gain; // these are strings rather than float's to differentiate between '0 gain' and 'not defined'
	wchar_t *publisher;
	wchar_t *composer;
  int year;
  int track;
	int tracks;
  int length;
	int rating; // file rating. can be 1-5, or 0 for undefined
	int playcount; // number of file plays.
	__time64_t lastplay; // last time played, in standard time_t format
	__time64_t lastupd; // last time updated in library, in standard time_t format
	__time64_t filetime; // last known file time of file, in standard time_t format
	int filesize; //last known file size, in kilobytes.
	int bitrate; // file bitrate, in kbps
	int type; // 0 for audio, 1 for video
	int disc; // disc number
	int discs; // number of discs
	int bpm;
  wchar_t **extended_info; 
  // currently defined extended columns (while they are stored internally as integers
  // they are passed using extended_info as strings):
  // use getRecordExtendedItem and setRecordExtendedItem to get/set.
  // for your own internal use, you can set other things, but the following values
  // are what we use at the moment. Note that setting other things will be ignored
  // by ML_IPC_DB*.
  // 
 
} itemRecordW;
 
typedef struct 
{
  itemRecordW *Items;
  int Size;
  int Alloc;
} itemRecordListW;
 
//
// all return 1 on success, -1 on error. or 0 if not supported, maybe?
 
// pass these a mlQueryStruct
// results should be zeroed out before running a query, but if you wish you can run multiple queries and 
// have it concatenate the results. tho it would be more efficient to just make one query that contains both,
// as running multiple queries might have duplicates etc.
// in general, though, if you need to treat "results" as if they are native, you should use
// copyRecordList to save a copy, then free the results using ML_IPC_DB_FREEQUERYRESULTS.
// if you need to keep an exact copy that you will only read (and will not modify), then you can
// use the one in the mlQueryStruct.
 
#define ML_IPC_DB_RUNQUERY 0x0700 
#define ML_IPC_DB_RUNQUERY_SEARCH 0x0701 // "query" should be interpreted as keyword search instead of query string
#define ML_IPC_DB_RUNQUERY_FILENAME 0x0702 // searches for one exact filename match of "query"
#define ML_IPC_DB_RUNQUERY_INDEX 0x703 // retrieves item #(int)query
 
#define ML_IPC_DB_FREEQUERYRESULTS 0x0705 // frees memory allocated by ML_IPC_RUNQUERY (empties results)
typedef struct 
{
  char *query;
  int max_results;      // can be 0 for unlimited
  itemRecordList results;
} mlQueryStruct;
 
/* Unicode versions of the above */
 
#define ML_IPC_DB_RUNQUERYW 0x1700
#define ML_IPC_DB_RUNQUERY_SEARCHW 0x1701 // "query" should be interpreted as keyword search instead of query string
#define ML_IPC_DB_RUNQUERY_FILENAMEW 0x1702 // searches for one exact filename match of "query"
#define ML_IPC_DB_RUNQUERY_INDEXW 0x1703 // retrieves item #(int)query
#define ML_IPC_DB_FREEQUERYRESULTSW 0x1705 // frees memory allocated by ML_IPC_RUNQUERYW (empties results)
typedef struct 
{
  wchar_t *query;
  int max_results;      // can be 0 for unlimited
  itemRecordListW results;
} mlQueryStructW;
 
/* ----------------------------- */
 
// pass these an (itemRecord *) to add/update.
// note that any NULL fields in the itemRecord won't be updated, 
// and year, track, or length of -1 prevents updating as well.
#define ML_IPC_DB_UPDATEITEM 0x0706    // returns -2 if item not found in db
#define ML_IPC_DB_ADDORUPDATEITEM 0x0707
 
#define ML_IPC_DB_REMOVEITEM 0x0708 // pass a char * to the filename to remove. returns -2 if file not found in db.
 
typedef struct 
{
  char*  fileName;   // file name to add
  int    meta_mode;  // metadata get mode (0 - don't use metadata, 1 - use metadata; -1 - read from user settings (ini file)
  int    gues_mode;  // metadata guessing mode (0 - smart, 1 - simple; 2 - no, -1 - read from user settings (ini file)
} LMDB_FILE_ADD_INFO;
 
#define ML_IPC_DB_UPDATEFILE 0x0710         // Update File in the Local Media Data Base (return -2 if file record not found)
#define ML_IPC_DB_ADDORUPDATEFILE 0x0711      // Adds or Updates File in the Local Media Data Base.
 
/* Unicode versions of the above */
 
// pass these an (itemRecordW *) to add/update.
// note that any NULL fields in the itemRecordW won't be updated, 
// and year, track, or length of -1 prevents updating as well.
#define ML_IPC_DB_UPDATEITEMW 0x1706    // returns -2 if item not found in db
#define ML_IPC_DB_ADDORUPDATEITEMW 0x1707
 
typedef struct 
{
  wchar_t*  fileName;   // file name to add
  int    meta_mode;  // metadata get mode (0 - don't use metadata, 1 - use metadata; -1 - read from user settings (ini file)
  int    gues_mode;  // metadata guessing mode (0 - smart, 1 - simple; 2 - no, -1 - read from user settings (ini file)
} LMDB_FILE_ADD_INFOW;
 
#define ML_IPC_DB_UPDATEFILEW 0x1710         // Update File in the Local Media Data Base (return -2 if file record not found) NOTE that this call is broken on 5.33.  Only use on 5.34+
#define ML_IPC_DB_ADDORUPDATEFILEW 0x1711      // Adds or Updates File in the Local Media Data Base.
 
/* ----------------------------- */
 
 
#define ML_IPC_DB_SYNCDB 0x0709 // sync db if dirty flags are set. good to do after a batch of updates.
 
 
 
 
// these return 0 if unsupported, -1 if failed, 1 if succeeded
 
// pass a winampMediaLibraryPlugin *. Will not call plugin's init() func. 
// YOU MUST set winampMediaLibraryPlugin->hDllInstance to NULL, and version to MLHDR_VER
// 5.25+:  You can set hDllInstance to valid value.  
//         This IPC will return -1 on failure, so a good check against old verions
//         is to try with hDllInstance set, if it returns -1, try again with hDllInstance=0
#define ML_IPC_ADD_PLUGIN 0x0750 
#define ML_IPC_REMOVE_PLUGIN 0x0751 // winampMediaLibraryPlugin * of plugin to remove. Will not call plugin's quit() func
 
#define ML_IPC_SEND_PLUGIN_MESSAGE 0x0752 // sends message to plugins (wParam = 0, lParam = pointer to the pluginMessage struct)
// pluginMessage struct
typedef struct {
  int messageType;
  INT_PTR param1;
  INT_PTR param2;
  INT_PTR param3;
} pluginMessage;
 
#define ML_IPC_ENSURE_VISIBLE 0x753 // ensures that the media library is visible
#define ML_IPC_IS_VISIBLE 0x754 // queries the current visibility status
 
#define ML_IPC_GET_PARENTAL_RATING 0x755 
 
#define ML_IPC_TOGGLE_VISIBLE 0x756
 
// this gets sent to any child windows of the library windows, and then (if not
// handled) the library window itself
 
#define WM_ML_CHILDIPC WM_APP+0x800 // avoids conflicts with any windows controls
#define ML_CHILDIPC_DROPITEM 0x100         // lParam = 100, wParam = &mlDropItemStruct
 
// current item ratings
#define ML_IPC_SETRATING 0x0900 // lParam = 0 to 5, rates current track -- inserts it in the db if it's not in it yet 
#define ML_IPC_GETRATING 0x0901 // return the current track's rating or 0 if not in db/no rating
 
// playlist entry rating
typedef struct {
  int plentry;
  int rating;
} pl_set_rating;
 
#define ML_IPC_PL_SETRATING 0x0902 // lParam = pointer to pl_set_rating struct
#define ML_IPC_PL_GETRATING 0x0903 // lParam = playlist entry, returns the rating or 0 if not in db/no rating
 
typedef struct {
  HWND dialog_parent;              // Use this window as a parent for the query editor dialog
  const char *query;               // The query to edit, or "" / null for new query
} ml_editquery;                 
 
#define ML_IPC_EDITQUERY    0x904  // lParam = pointer to ml_editquery struct, returns 0 if edition was canceled and 1 on success
                                   // After returning, and if ok was clicked, the struct contains a pointer to the edited query. this pointer is static : 
                                   // - do *not* free it
                                   // - if you need to keep it around, strdup it, as it may be changed later by other plugins calling ML_IPC_EDITQUERY.
 
typedef struct {                
  HWND dialog_parent;              // Use this window as a parent for the view editor dialog
  const char *query;               // The query to edit, or "" / null for new views
  const char *name;                // Name of the view (ignored for new views)
  int mode;                        // View mode (0=simple view, 1=artist/album view, -1=hide mode radio boxes)
} ml_editview;                 
 
#define ML_IPC_EDITVIEW     0x905  // lParam = pointer to ml_editview struct, returns 0 if edition was canceled and 1 on success
                                   // After returning, and if ok was clicked, the struct contains the edited values. String pointers are static: 
                                   // - do *not* free them 
                                   // - if you need to keep them around, strdup them, as they may be changed later by other plugins calling ML_IPC_EDITQUERY.
 
#define ML_IPC_SET_FILE_RATING 0x0906 // lParam = 0 to 5, rates current track -- inserts it in the db if it's not in it yet 
#define ML_IPC_GET_FILE_RATING 0x0907 // return the current track's rating or 0 if not in db/no rating
 
// playlist entry rating
typedef struct {
  const char* fileName;
  int newRating;
} file_set_rating;
 
#define ML_IPC_SMARTVIEW_COUNT 0x0908	// returns the number of smartviews. no parameter required
#define ML_IPC_SMARTVIEW_INFO 0x0909	// pass a mlSmartViewInfo*. returns 1 on success and 0 on failure
#define ML_IPC_SMARTVIEW_ADD 0x0910	// pass a mlSmartViewInfo* with filled in size, name, query, mode, iconImgIndex. treeitemid gets filled in. returns 1 on success and 0 on failure
 
typedef struct
{
	// you fill these in
	size_t size;  // set to sizeof(mlSmartViewInfo)
	size_t smartViewNum;
	// ml_local fills these in
	wchar_t smartViewName[128];
	wchar_t smartViewQuery[512];
	int mode;
	int iconImgIndex;
	int treeItemId;
} mlSmartViewInfo;
 
 
#define ML_IPC_SET_FILE_RATINGW 0x0911 // lParam = 0 to 5, rates current track -- inserts it in the db if it's not in it yet 
#define ML_IPC_GET_FILE_RATINGW 0x0912 // return the current track's rating or 0 if not in db/no rating
 
// playlist entry rating
typedef struct {
  const wchar_t *fileName;
  int newRating;
} file_set_ratingW;