MMIOM_SEEK message

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 

Parameters

lNewFilePos

New file position. The meaning of this value is dependent on the flag specified inlChangeFlag.

lChangeFlag

Flag specifying how the file position is changed. The following values are defined:

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.

Return Value

Returns the new file position. If there is an error, the return value is 1.

Remarks

The I/O procedure is responsible for maintaining the current file position in the lDiskOffset member of the MMIOINFO structure.

Requirements

Minimum supported client
Windows 2000 Professional [desktop apps only]
Minimum supported server
Windows 2000 Server [desktop apps only]
Header
Mmsystem.h (include Windows.h)