The pages on this site contain documentation for very old MS-DOS software,
purely for historical purposes.
If you're looking for up-to-date documentation, particularly for programming,
you should not rely on the information found here, as it will be woefully
out of date.
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:nNew Main Module Dialog
All the loaded modules are shown in the list box. Choose
the one you want to be the main module.
When you start running a program, the first executable
statement in the main module is always the first statement
executed.