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TechTalk: Dynamic Command Line

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Question: What is the name of the IBM-supplied program that you can call from a HLL to get a command entry line? It's like pressing F21 when you are in SEU.

Answer: It's called QUSCMDLN, and has no parameters. It will always present a command line window at the bottom of the screen. If your display file is set to 132x27, it shows a longer command line. I have no idea how SEU can display this window at the top or bottom of the screen depending on the cursor position; perhaps they're not using QUSCMDLN but something else they don't tell us about.

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