### IDirectDrawVideoPort::GetFieldPolarity

The IDirectDrawVideoPort::GetFieldPolarity method retrieves the status of the video field.

HRESULT GetVideoField(

LPBOOL lpbVideoField

);

##### Parameters

lpbVideoField
  Address of a variable that will be set to indicate the current field polarity. This value is set to true if the current video field is the even field of an interlaced video signal and false otherwise.

##### 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_VIDEONOTACTIVE