View source for MM MCIPLAYLISTMESSAGE

{{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.

;''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.

[[Category:Notification Messages]]