'宣言 Public Overloads Function DrawScrollThumb( _ ByVal orientation As Orientation, _ ByRef drawParams As UIElementDrawParams, _ ByVal rect As Rectangle, _ ByVal clipRect As Rectangle, _ ByVal buttonState As UIElementButtonState, _ ByVal drawThumbGrip As Boolean _ ) As Boolean
public bool DrawScrollThumb( Orientation orientation, ref UIElementDrawParams drawParams, Rectangle rect, Rectangle clipRect, UIElementButtonState buttonState, bool drawThumbGrip )