The MMIOM_OPEN message is sent to an I/O procedure by the mmioOpen function to request that a file be opened or deleted.
MMIOM_OPEN lParam1 = (LPARAM) lpszFileName lParam2 = reserved
Null-terminated string containing the name of the file to open.
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following:
|MMIOM_CANNOTOPEN||The file could not be opened.|
|MMIOM_OUTOFMEMORY||Not enough memory to perform the operation.|
The lDiskOffset member of the MMIOINFO structure is initialized to zero. If this value is incorrect, the I/O procedure must correct it.
|Minimum supported client
||Windows 2000 Professional [desktop apps only]
|Minimum supported server
||Windows 2000 Server [desktop apps only]