Notifies a video capture driver to display a dialog box for setting the video parameters of a channel.
DV_ERR_INVALHANDLE | Indicates the device handle is invalid. |
DV_ERR_NOTSUPPORTED | Indicates the message is not supported. |
dwParam1
Handle to the parent window.
dwFlags
Flags for the dialog box.
The VIDEO_DLG_QUERY flag indicates that the driver immediately returns DV_ERR_OK if it supplies a dialog box for the channel or DV_ERR_NOTSUPPORTED otherwise.
Typically, this dialog box lets the user configure a video channel. For example, a VIDEO_IN channel might supply a dialog box to let the user select image dimensions and bit depth. Each channel type (VIDEO_IN, VIDEO_OUT, VIDEO_EXTERNALIN, and VIDEO_EXTERNALOUT) can have a unique configuration dialog box.