MMIOM_OPEN

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

Parameters

lpszFileName
Null-terminated string containing the name of the file to open.
lParam2
Reserved.

Return Values

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.

Remarks

The dwFlags member of the MMIOINFO structure contains flags passed to the mmioOpen function.

The lDiskOffset member of the MMIOINFO structure is initialized to zero. If this value is incorrect, the I/O procedure must correct it.

If the application passed an MMIOINFO structure to mmioOpen, the return value is returned in the wErrorRet member.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in mmsystem.h.

See Also

Multimedia File I/O Overview, Multimedia File I/O Messages, MMIOINFO, mmioOpen