### IDirectDrawVideoPort::GetVideoLine

The IDirectDrawVideoPort::GetVideoLine method retrieves the current line of video being written to the frame buffer.

HRESULT GetVideoLine(

LPDWORD lpdwLine

);

##### Parameters

lpdwLine
  Address of a variable that will be filled with a value indicating the video line currently being written to the frame buffer.

##### Return Values

If the method succeeds, the return value is DD_OK.

If the method fails, the return value may be one of the following error values:

DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_UNSUPPORTED
DDERR_VERTICALBLANKINPROGRESS
DDERR_VIDEONOTACTIVE

##### Remarks

The value this method retrieves reflects the true video line being written, relative to the field height, before any prescaling occurs.