The MCI_INFO_PARMS structure contains parameters for the MCI_INFO message. When assigning data to the fields in this data structure, set the corresponding MCI flags in the lParam1 parameter of mciSendCommand to validate the fields.
typedef struct {
DWORD dwCallback;
LPSTR lpstrReturn;
DWORD dwRetSize;
} MCI_INFO_PARMS;
The MCI_INFO_PARMS structure has the following fields:
dwCallback
The low-order word specifies a window handle used for the MCI_NOTIFY flag.
lpstrReturn
Specifies a long pointer to a user-supplied buffer for the return string.
dwRetSize
Specifies the size in bytes of the buffer for the return string.