void System.Drawing.Design.IToolboxService.AddCreator(System.Drawing.Design.ToolboxItemCreatorCallback creator, string format)
 {
 }
 void System.Drawing.Design.IToolboxService.AddCreator(System.Drawing.Design.ToolboxItemCreatorCallback creator, string format, System.ComponentModel.Design.IDesignerHost host)
 {
 }
 // Pas utiliser
 public void AddCreator(System.Drawing.Design.ToolboxItemCreatorCallback creator, string format)
 {
 }