| Microsoft DirectX 9.0 SDK Update (October 2004) |
The Invalidate method flushes all queued messages from the specified time forward and causes all tracks of all segments to resend their data.
Syntax
HRESULT Invalidate(
MUSIC_TIME mtTime,
DWORD dwFlags
);
Parameters
mtTime
Time from which to invalidate, adjusted by dwFlags. Setting this value to 0 causes immediate invalidation.
dwFlags
Flag that aligns mtTime to the next measure, beat, or grid. This value can be 0 or one of the following members of the DMUS_SEGF_FLAGS enumeration:
DMUS_SEGF_MEASURE
DMUS_SEGF_BEAT
DMUS_SEGF_GRID
Return Values
If the method succeeds, the return value is S_OK.
If it fails, the method can return DMUS_E_NO_MASTER_CLOCK.
Remarks
If mtTime is so long ago that it is impossible to invalidate that time, the earliest possible time is used.
Notes that have already been sent to the port are normally cut off by invalidation; that is, any pending note-off message is immediately sent. However, this behavior can be overridden by using one of the DMUS_NOTEF_FLAGS flags in the message structure.
Requirements
Header: Dmusici.h
Library: Dmime.dll, Dmimed.dll
See Also