Читать книгу Excel 2019 Power Programming with VBA - Michael Alexander, Dick Kusleika - Страница 44

Anyone who has used a personal computer for any length of time is undoubtedly familiar with dialog boxes. Consequently, custom Excel dialog boxes can play a major role in the user interfaces that you design for your applications. Figure 1.2 shows an example of a custom dialog box.

FIGURE 1.2 A dialog box created with Excel's UserForm feature

A custom dialog box is known as a UserForm. A UserForm can solicit user input, get a user's options or preferences, and direct the flow of your entire application. The elements that make up a UserForm (buttons, drop-down lists, check boxes, and so on) are called controls—more specifically, ActiveX controls. Excel provides a standard assortment of ActiveX controls, and you can also incorporate third-party controls.

After adding a control to a dialog box, you can link it to a worksheet cell so that it doesn't require any macros (except a simple macro to display the dialog box). Linking a control to a cell is easy, but it's not always the best way to get user input from a dialog box. Most of the time, you want to develop VBA macros that work with your custom dialog boxes.

We cover UserForms in detail in Part III.