多项选择题
A. Add the OnClick event handler for the Login button to the code used in the custom user control.
B. Add the OnClick event handler for the Login button to the code used in the Web Form where the control is added.
C. In the Page_Load method of the Web Form, add a code segment to set the visibility of the TextBox and Button controls where the control is added.
D. In the Page_Load method of the custom user control, add a code segment to set the visibility of the TextBox and Button controls.
多项选择题 You are developing a Web application to display products. Products are displayed on different pages on your Web site. You want to create a user control to manage the display of products. You need a default visual implementation of the UI of the user control. In addition, you need to provide developers with the flexibility to change the layout and controls of the UI. Which three actions should you perform? （）
单项选择题 You develop a Web control. The Web control consists of labels and associated text boxes. You need to ensure that the Web control has both toolbox and visual designer support. What should you do? （）
多项选择题 You create a control named ContosoUI for a Web application. You need to add the control to the toolbox of Microsoft Visual Studio .NET. Which two actions should you perform?（）