MM MCIPLAYLISTMESSAGE: Difference between revisions
Created page with "{{DISPLAYTITLE:MM_MCIPLAYLISTMESSAGE}} This message notifies an application that the playlist processor has encountered a **MESSAGE** instruction. ==Syntax== <PRE> MsgParam1 USHORT usInstruction; →Playlist instruction number.: USHORT usDeviceID; →Device ID.: MsgParam2 ULONG ulMessageParm; →Playlist parameter.: </PRE> ==Parameters== ;''usInstruction'' (USHORT) - input :Playlist instruction number. ;''usDeviceID'' (USHORT) - input :Device ID. ;..." |
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Latest revision as of 03:04, 26 November 2025
This message notifies an application that the playlist processor has encountered a **MESSAGE** instruction.
Syntax
MsgParam1 USHORT usInstruction; /* Playlist instruction number. */ USHORT usDeviceID; /* Device ID. */ MsgParam2 ULONG ulMessageParm; /* Playlist parameter. */
Parameters
- usInstruction (USHORT) - input
- Playlist instruction number.
- usDeviceID (USHORT) - input
- Device ID.
- ulMessageParm (ULONG) - input
- Parameter specified in playlist **MESSAGE** instruction (operand 2).
Returns
- rc (BOOL) - return
- Success indicator.
- TRUE: Successful completion.
- FALSE: Error occurred. (Note: The return value is typically ignored for this posted message.)
Remarks
This message allows an application to execute custom logic when a specific point (marked by a **MESSAGE** instruction) is reached during playlist playback.
Default Processing
The default window procedure does not expect to receive this message and therefore takes no action on it, other than to set rc to the default value of FALSE.