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Part IV: Communicating with Your Users
❑ Is the tab order set correctly? The user should be able to tab through
the dialog box and access the controls sequentially.
❑ If you plan to store the dialog box in an add-in, did you test it thoroughly
after creating the add-in?
❑ Will your VBA code take appropriate action if the user cancels the dialog
box or presses Esc or uses the close button?
❑ Does the text contain any misspellings? Unfortunately, the Excel spell
checker doesn’t work with UserForms, so you’re on your own when it
comes to spelling.
❑ Will your dialog box fit on the screen in the lowest resolution to be used
(usually 800×600 mode)? In other words, if you develop your dialog box
by using a high-resolution video mode, your dialog box may be too big
to fit on a screen in lower resolution.
❑ Do all TextBox controls have the appropriate validation setting? If you
intend to use the WordWrap property, is the MultiLine property also set
to True?
❑ Do all ScrollBars and SpinButtons allow valid values only?
❑ Do all ListBoxes have their MultiSelect property set properly?
The best way to master custom dialog boxes is by creating dialog boxes —
lots of them. Start simply and experiment with the controls and their properties.
And don’t forget about the Help system; it’s your best source for details
about every control and property.