typedef struct {
    DWORD  dwCallback;
    DWORD  dwReturn;
    DWORD  dwItem;
} MCI_GETDEVCAPS_PARMS;
 The MCI_GETDEVCAPS_PARMS structure contains parameters for the MCI_GETDEVCAPS message. When assigning data to the members in this structure, set the corresponding MCI flags in the lParam1 parameter of mciSendCommand to validate the members.
MCI_GETDEVCAPS