This MCI command message loads a file. Support of this message by a device is optional. The parameters and flags for this message vary according to the selected device.
DWORD lParam1
The following flags apply to all devices supporting MCI_LOAD:
MCI_NOTIFY
Specifies that MCI should post the MM_MCINOTIFY message when this command completes. The window to receive this message is specified in the dwCallback field of the data structure identified by lpLoad.
MCI_WAIT
Specifies that the load operation should finish before MCI returns control to the application.
MCI_LOAD_FILE
Indicates the lpfilename field of the data structure identified by lpLoad contains a pointer to a buffer containing the file name.
LPMCI_LOAD_PARMS lParam2
Specifies a far pointer to the MCI_LOAD_PARMS data structure. (Devices with additional parameters might replace this data structure with a device-specific data structure.)
DWORD lParam1
The following additional flags apply to video overlay devices supporting MCI_LOAD:
MCI_OVLY_RECT
Specifies that the rc field of the data structure identified by lParam2 contains a valid display rectangle that identifies the area of the video buffer to update.
LPMCI_OVLY_LOAD_PARMS lParam2
Specifies a far pointer to a MCI_OVLY_LOAD_PARMS data structure.
Returns zero if successful. Otherwise, it returns an MCI error code.
This command applies to video overlay devices.