'宣言 Public Overloads Function DrawSpinButton( _ ByVal direction As ScrollButton, _ ByRef drawParams As UIElementDrawParams, _ ByVal rect As Rectangle, _ ByVal clipRect As Rectangle, _ ByVal buttonState As ButtonState _ ) As Boolean
public bool DrawSpinButton( ScrollButton direction, ref UIElementDrawParams drawParams, Rectangle rect, Rectangle clipRect, ButtonState buttonState )