public void CanExtendTest () { Control myControl = new Control (); Form myForm = new Form (); myForm.ShowInTaskbar = false; ToolBar myToolBar = new ToolBar (); ErrorProvider myErrorProvider = new ErrorProvider (); Assert.AreEqual (myErrorProvider.CanExtend (myControl), true, "#ext1"); Assert.AreEqual (myErrorProvider.CanExtend (myToolBar), false, "#ext2"); Assert.AreEqual (myErrorProvider.CanExtend (myForm), false, "#ext3"); myForm.Dispose (); }