The MMIOM_SEEK message is sent to an I/O procedure by the mmioSeek function to request that the current file position be moved.
MMIOM_SEEK lParam1 = (LPARAM) lNewFilePos lParam2 = (LPARAM) lChangeFlag
New file position. The meaning of this value is dependent on the flag specified inlChangeFlag.
Flag specifying how the file position is changed. The following values are defined:
Requirement Value SEEK_CUR Move the file position to be lNewFilePos bytes from the current position. lNewFilePos can be positive or negative. SEEK_END Move the file position to be lNewFilePos bytes from the end of the file. SEEK_SET Move the file position to be lNewFilePos bytes from the beginning of the file.
Returns the new file position. If there is an error, the return value is 1.
The I/O procedure is responsible for maintaining the current file position in the lDiskOffset member of the MMIOINFO structure.
|Minimum supported client
||Windows 2000 Professional [desktop apps only]
|Minimum supported server
||Windows 2000 Server [desktop apps only]