MMIOM_WRITE  1F.XBO 

The MMIOM_WRITE message is sent to an I/O procedure by the mmioWrite1MNLDQQ function to request that data be written to an open file.

MMIOM_WRITE

lParam1 = (LPARAM) lpBuffer

lParam2 = (LPARAM) cbWrite

Parameters

lpBuffer

Address of a buffer containing the data to write to the file.

cbWrite

Number of bytes to write to file.

Return Values

Returns the number of bytes actually written to the file. If there is an error, the return value is - 1.

Remarks

The I/O procedure is responsible for updating the lDiskOffset member of the MMIOINFO structure to reflect the new file position after the write operation.

See Also