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FRONTEND.TXT
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1998-01-13
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This file is only useful for people who are writing frontends for Winamp.
Actually, it's useful for plugin authors too.
There are some useful notes for VB programmers at the end of this file.
Psuedo IPC for frontends for Winamp v1.55+ (< 2.0)
This document is horribly [de]organized, and is pretty much just hacked
together for people to use.
Winamp's window is found using:
hwnd_winamp = FindWindow("Winamp v1.x",NULL);
#define WM_WA_IPC WM_USER
// messages are sent to the winamp window using:
result = SendMessage(hwnd_winamp,WM_WA_IPC,command_data,command);
/* Messages available to send */
#define IPC_GETVERSION 0
/*
IPC_GETVERSION is sent to the window, and the return value is the version
Version 1.55 = 0x1551
Version 1.6b = 0x16A0
Version 1.60 = 0x16AF
Version 1.61 = 0x16B0
Version 1.62 = 0x16B1
Version 1.64 = 0x16B3
Version 1.666 = 0x16B4
Version 1.69 = 0x16B5
Version 1.70 = 0x1700
Version 1.72 = 0x1702
Version 1.73 = 0x1703
Version 1.80 = 0x1800
Version 1.81 = 0x1801
Version 1.82 = 0x1802
Version 1.90 = 0x1900
the command_data parameter is 0.
so,
if (SendMessage(hwnd_winamp,WM_WA_IPC,0,IPC_GETVERSION) != 0x1551)
MessageBox(NULL,"Error, Winamp 1.55 not found","Warning",MB_OK);
*/
#define IPC_PLAYFILE 100
/*
IPC_PLAYFILE is sent to the window for each char of a null terminated string of a file to ADD
to the playlist (it doesn't change the playing status). Note, if you pass a file with the extension
".m3u" it will be treated as a playlist.
for example:
char *file = "C:\\download\\booga.mp3";
int x;
for (x = 0; x <= strlen(file); x ++)
PostMessage(hwnd_winamp,WM_WA_IPC,(LPARAM)file[x],IPC_PLAYFILE);
will add "C:\download\booga.mp3" to the end of the playlist
*/
#define IPC_DELETE 101
/*
IPC_DELETE deletes the internal Winamp playlist.
SendMessage(hwnd_winamp,WM_WA_IPC,0,IPC_DELETE);
*/
#define IPC_STARTPLAY 102
/*
IPC_STARTPLAY starts the playing.
SendMessage(hwnd_winamp,WM_WA_IPC,0,IPC_STARTPLAY);
*/
#define IPC_CHDIR 103
/*
IPC_CHDIR is sent to the window for each char of a null terminated string of a directory to change to
for example:
char *dir = "C:\\Download";
int x;
for (x = 0; x <= strlen(file); x ++)
PostMessage(hwnd_winamp,WM_WA_IPC,(LPARAM)dir[x],IPC_PLAYFILE);
will change the winamp process to "C:\download" (useful for relative pathnames and loading playlists)
*/
#define IPC_ISPLAYING 104
/*
IPC_ISPLAYING returns the status of playback.
If it returns 1, it is playing. if it returns 3, it is paused, if it returns 0, it is not playing.
If it returns something other than 1,3,or 0, something is screwed.
isplaying = SendMessage(hwnd_winamp,WM_WA_IPC,0,IPC_ISPLAYING);
*/
#define IPC_GETOUTPUTTIME 105
/*
IPC_GETOUTPUTTIME returns the position in milliseconds of the
current song (lParam = 0), or the song length, in seconds (lParam = 1).
Returns -1 if not playing or error.
song_pos = SendMessage(hwnd_winamp,WM_WA_IPC,0,IPC_GETOUTPUTTIME);
song_len = SendMessage(hwnd_winamp,WM_WA_IPC,1,IPC_GETOUTPUTTIME);
*/
#define IPC_JUMPTOTIME 106
/*
*ONLY AVAILABLE IN v1.60+*
IPC_JUMPTOTIME sets the position in milliseconds of the current song (approximately)
Returns -1 if not playing, 1 on eof, or 0 if successful
SendMessage(hwnd_winamp,WM_WA_IPC,new_song_pos,IPC_JUMPTOTIME);
*/
#define IPC_WRITEPLAYLIST 120
/*
*ONLY AVAILABLE IN v1.666+*
IPC_WRITEPLAYLIST writes the current playlist to <winampdir>\\Winamp.pl
int cursong = SendMessage(hwnd_winamp,WM_WA_IPC,0,IPC_WRITEPLAYLIST);
(cursong is the index of the current song in the playlist)
*/
// THESE MIGHT CHANGE in the future :)
//Also, you can send standard WM_COMMAND messages to the Winamp window (for other controls), including
// Send using SendMessage(hwnd_winamp,WM_COMMAND,WINAMP_OPTIONS_EQ/*orwhatever*/,0);
// toggles the EQ window
#define WINAMP_OPTIONS_EQ 40036
// toggles the playlist window
#define WINAMP_OPTIONS_PLEDIT 40040
// turns the volume up a little
#define WINAMP_VOLUMEUP 40058
// turns the volume down a little
#define WINAMP_VOLUMEDOWN 40059
// fast forwards 5 seconds
#define WINAMP_FFWD5S 40060
// rewinds 5 seconds
#define WINAMP_REW5S 40061
// the following are the five main control buttons, with optionally shift or control pressed
// (for the exact functions of each, just try it out)
#define WINAMP_BUTTON1 40044
#define WINAMP_BUTTON2 40045
#define WINAMP_BUTTON3 40046
#define WINAMP_BUTTON4 40047
#define WINAMP_BUTTON5 40048
#define WINAMP_BUTTON1_SHIFT 40144
#define WINAMP_BUTTON2_SHIFT 40145
#define WINAMP_BUTTON3_SHIFT 40146
#define WINAMP_BUTTON4_SHIFT 40147
#define WINAMP_BUTTON5_SHIFT 40148
#define WINAMP_BUTTON1_CTRL 40154
#define WINAMP_BUTTON2_CTRL 40155
#define WINAMP_BUTTON3_CTRL 40156
#define WINAMP_BUTTON4_CTRL 40157
#define WINAMP_BUTTON5_CTRL 40158
// always goes to the previous song (unlike button 1), 1.666+
#define WINAMP_PREVSONG 40198
// pops up the load file(s) box
#define WINAMP_FILE_PLAY 40029
// pops up the preferences
#define WINAMP_OPTIONS_PREFS 40012
// toggles always on top
#define WINAMP_OPTIONS_AOT 40019
// pops up the about box :)
#define WINAMP_HELP_ABOUT 40041
/* A little about Visual Basic
In VB, the SendMessage function does not work, you must use the SendMessageTimeout.
Otherwise, VB will not wait for WinAmp to return a value. Here's an example...
Dim Success as Long
Dim ReturnValue As Long
Success = SendMessageTimeout(WinampHandle, WM_USER, 0, 104, SMTO_BLOCK, 1000, ReturnValue)
MsgBox (ReturnValue)
If you are sending commands, use this format;
Dim Success as Long
Success = PostMessage(WinampHandle, WM_COMMAND, 40022, 0)
// -VB notes by Amal G.
*/
// hope this helps,
// -Justin [justin@nullsoft.com]