Microsoft DirectX 9.0


The SetSourcePosition method sets a new source position for the video.


HRESULT SetSourcePosition(
    long Left,
    long Top,
    long Width,
    long Height



New left coordinate.


New top coordinate.


New width.


New height.

Return Value

Returns an HRESULT value that depends on the implementation; can be one of the following values, or other values not listed.

Value Description
E_FAIL Failure.
E_INVALIDARG Invalid argument.
E_POINTER Null pointer argument.
NOERROR Success.
VFW_E_NOT_CONNECTED The operation cannot be performed because the pins are not connected.


An application can change the source and destination rectangles for the video through the IBasicVideo interface. The source rectangle affects which section of the native video source will appear on the display; the destination rectangle affects where the video will appear when played. The destination rectangle is relative to the client area of the window in which it is playing. The upper-left corner of the window is coordinate (0,0).

See Also