A form definition must be loaded before the form can be displayed. If you have stored the definition in a
.pmlfrmfile then loading will be automatic when the form is displayed for the first time. Normally, a form is displayed as a result of the operator making a menu selection or pressing a button on a form. This is achieved either by using the Form Directive in the menu or button definition (see next section) or by means of the command
show !!formnameused in the gadget’s callback.
However, to display forms when you are developing them, you may find it convenient to type the command:
Sometimes it is useful to force the loading of a form’s definition file before the form is actually displayed, so that you can edit the form or gadget attributes from another form’s callbacks before the form is actually displayed. Using the command
This post was taken from pdmsmacro