public static ComboBox add_ComboBox(this DesignerCanvas designerCanvas, int top, int left) { return(designerCanvas.add_ComboBox(top, left, -1, -1)); }
// ComboBoc public static ComboBox add_ComboBox(this DesignerCanvas designerCanvas) { return(designerCanvas.add_ComboBox(-1, -1, -1, -1)); }