The MCI_SET_PARMS structure contains parameters for the MCI_SET 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;
DWORD dwTimeFormat;
DWORD dwAudio;
} MCI_SET_PARMS;
The MCI_SET_PARMS structure has the following fields:
dwCallback
The low-order word specifies a window handle used for the MCI_NOTIFY flag.
dwTimeFormat
Specifies the time format used by the device.
dwAudio
Specifies the audio output channel.