Use the Run Form command from the File menu to test a form that you are developing.
When testing a form, the following points apply.
You can use the Run Form command to run any form, whether that form was generated by you or generated by using the Form Wizard.
The form must be selected for edit in the Painter before you can run it.
The form runs as though in runtime mode; that is, it can be used to enter data. However, note the following restrictions.
The results are unpredictable if there is any dependency on another form or another process being run first.
An MDI child form is run inside an MDI test frame.
For details, see "Testing Your Form", earlier in this chapter.