Rotates a GdPicture image from the center with a specific angle keeping the originals width and height of the picture.

public GdPictureStatus RotateAnglePreserveDimensionsCenter(
    int ImageID, 
    Single Angle
);

Public Function RotateAnglePreserveDimensionsCenter(
    ByVal ImageID As Integer, 
    ByVal Angle As Single
) As GdPictureStatus

A member of the GdPictureStatus enumeration.