This structure contains fields for the MCI_BUFFER message.
typedef struct _MCI_BUFFER_PARMS { HWND hwndCallback; /* Window handle. */ ULONG ulStructLength; /* Structure length. */ ULONG ulNumBuffers; /* Number of buffers. */ ULONG ulBufferSize; /* Suggested buffer size. */ ULONG ulMinToStart; /* Not used. */ ULONG ulSrcStart; /* Not used. */ ULONG ulTgtStart; /* Not used. */ PVOID pBufList; /* Pointer to list of buffers. */ } MCI_BUFFER_PARMS; typedef MCI _ BUFFER _ PARMS * PMCI _ BUFFER _ PARMS ;