Using the File-System Controls (Directory List Box, Drive List Box, and File List Box) Use the drive list box, the directory list box, and the file list box controls to allow users of your applications to explore the file system. Doing so can cause your application or the operating system to stop responding.Insiders: Want to see new features as soon as possible?You can download the nightly Insiders build and try the latest updates as soon as they are available.
This means that as a programmer, you have the power to supply the exact pattern for the input you desire in any text input field. Again, certain special characters are obviously not allowed.
For more information, see the WM_KILLFOCUS topic in the "Keyboard Input Reference" section, and the "Message Deadlocks" section of the "About Messages and Message Queues" topic in the MSDN library at
The following code example uses the derived class Text Box and validates an e-mail address that the user enters.
Some of the controls you can use in your applications include text boxes, command buttons, and list boxes.
Other controls let you access other applications and process data as if the remote application was part of your code.