| MCI_NOTIFY | Specifies that MCI should post the MM_MCINOTIFY message when this command completes. The window that receives this message is specified in the dwCallback field of the data structure identified by lParam2. |
| MCI_TEST | Queries the device to determine if it can execute the command. The device returns an error if it is incapable of executing the command. It returns no error if it can handle the command. MCI returns control to the application without executing the command. |
| MCI_WAIT | Specifies that the operation should complete before MCI returns control to the application. |
| LPMCI_DGV_GENERIC_PARMS lParam2 | Specifies a far pointer to the MCI_DGV_GENERIC_PARMS data structure. (Devices with extended command sets might replace this data structure with a device-specific data structure.) |
| Return Value | Returns zero if successful. Otherwise, it returns an MCI error code. |
| Comments | The dialog box should not include parameters covered elsewhere in this specification. This ensures that applications provide only one way to modify statdard parameters. |