This command creates a working copy of the current dialog so that the various controls can be tested and operated.
·To enter test mode:
Toggle Test Mode on.
List boxes and combo boxes will have sample lines inserted into them.
Certain styles of some controls will not be allowed in test mode. For instance, a dialog with the System Modal style set can be tested, but it will not behave exactly as a system modal dialog would.
·To exit test mode:
Toggle Test Mode off. If the dialog has a system menu, select the dialog's Close command.