Creating dialog boxes for macros

All dialog boxes should abide by the following guidelines:

• They should have a meaningful title.

• They should provide an obvious functionality for cancelling or closing them.

• Their layout should make them easy to use, but they should also provide a Help button from which users can access how-to documentation.

• Their every control should feature a ControlTipText string, so that users can receive information about each control by passing the pointer over it.

However, there are two kinds dialog boxes: modal and modeless.

Modal dialog boxes must be acted upon before the user can resume the macro. The application is locked until the dialog box is dismissed (either by submitting it or by cancelling it). Built-in dialog boxes that you can control with VBA are almost always modal.

Modeless dialog boxes do not lock the application, so they can be left open while the user continues working in the application. In this way, they behave like dockers.

Before you can code and design dialog box, you must decide whether to make it modal or modeless. Choosing between modal and modeless dialog boxes

The kind of dialog box you should provide depends on what you want to achieve.

For example, if you are creating a solution that allows an effect or action to be applied to one or more shapes, and if you think that the user will want to apply the same effect or action subsequently to a different selection of shapes, then you should provide a modeless dialog box so that the user can set up the effect in the dialog box once and then apply it many times.

If, on the other hand, if you are creating a solution that is a "one-shot" end-to-end solution (such as a replacement Print or Save dialog box), then a modal dialog box would be more appropriate; in a case such as this, it is unlikely that a user would want to apply the same settings repeatedly, so having to re-opening the dialog box would be less convenient for them than having to manually close it.

Modal dialog boxes usually have the following features:

• an OK button — performs the dialog box's ultimate action and then hides the dialog box. It is the default button.

• a Cancel button — dismisses the dialog box without performing the dialog box's action. The Close button in the upper-right corner of the dialog box provides the same functionality.

Some modal dialog boxes require an Apply button that performs the dialog box's action without making it permanent, such that cancelling the dialog box undoes the action.

If the dialog box is in the style of a wizard, it should have a Previous button and a Next button, as well as a Cancel button. On the first page of the sequence, the Previous button should be disabled (that is, have its Enabled property set to False), while on the last page, the Next button should become the Finish button to indicate that the final page has been reached.

Modeless dialog boxes usually have the following features:

• an Apply or Create button — performs the dialog box's action and can, in fact, be specially labelled to described the dialog box's action. This button should be the default.

• a Close button — closes the dialog box. This button is used after the user has applied the desired action.

After you have chosen whether your dialog box should be modal or modeless, you are ready to start setting it up. Setting up dialog boxes

To set up a customized dialog box for use in your VBA solution, you use the Form Designer in the VB Editor. The Form Designer provides easy access to the tools for coding and designing a form.

Corel Vba Guide
A blank form in the Form Designer You can access the Form Designer by creating a new, blank form.

W \ For information on accessing the User Form toolbar, which you can use when designing a form, see "Using the toolbars" on page 22.

You can test a form at any time by running it.

To create a new, blank form

• In the Project Explorer, right-click the project to which you want to add a dialog box, and then click Insert \ UserForm.

W V To change the title of the form, click the form to select it, and then in the Properties window, change the Caption property.

It is highly recommended that you give each form a unique, descriptive name. You can do this from the Properties window, but remember to follow the rules for naming variables in VBA.

To test a form by running it

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