>What lines of code do I use so that my users can Ctrl+C and Ctrl+V text into and out of my program? Textbox and editbox subclass? If so, where? And what lines of code would I use?
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>I am reasonably experienced with Clipper and Fox, but have not been able to get this working. Thanks in advance for any tips.

Actually, you don't need in any code. It's enough to include appropriate 'Edit' system menu bars into your application menu.