Performs a twirl effect on a GdPicture image or into an area of a GdPicture image defined by SetROI() function.

public GdPictureStatus FxTwirl(
    int ImageID, 
    Single Factor
);

Public Function FxTwirl(
    ByVal ImageID As Integer, 
    ByVal Factor As Single
) As GdPictureStatus

A member of the GdPictureStatus enumeration.