DVM_SRC_RECT

Notifies a video capture driver to set and retrieve the source rectangle used by a video device channel.

• Returns DV_ERR_OK if successful or an error code otherwise. The DV_ERR_NOTSUPPORTED error code indicates the message is not supported.

lpSrcRect

Address of a RECT structure.

dwFlags

Flags that indicate the type of transfer requested. The following flags are defined:

VIDEO_CONFIGURE_SET	Sends a source rectangle to the device driver.
VIDEO_CONFIGURE_GET	Gets the current source rectangle from the device driver.
VIDEO_CONFIGURE_MIN	Gets the minimum source rectangle from the device driver.
VIDEO_CONFIGURE_MAX	Gets the maximum source rectangle from the device driver.
VIDEO_CONFIGURE_CURRENT	Gets or sets the current source rectangle.
VIDEO_CONFIGURE_QUERY	Interrogates the driver to determine if it supports the message.

Either the VIDEO_CONFIGURE_SET or the VIDEO_CONFIGURE_GET flag must be set, specifying the direction of the transfer.

The use of the source rectangle for a channel depends on the channel type. For the VIDEO_EXTERNALOUT channel, the source rectangle specifies the portion of the frame buffer displayed in the overlay window, in pixel coordinates. For the VIDEO_IN, VIDEO_EXTERNALIN, and VIDEO_OUT channels, the source rectangle is currently undefined.