Open_Form, Call_Form and New_Form

Multiple Forms can be invoked in an application through three built-in:

1)      OPEN_FORM

2)      CALL_FORM

3)      NEW_FORM

OPEN_FORM:

OPEN_FORM opens another form in a modeless window. The user can work on Multiple forms concurrently. The user can navigate within multiple forms.

With the OPEN_FORM the user can call another form in a different database session.

Syntax: OPEN_FORM (‘form_name’, active_mode, session_mode, data_mode, paramlist);   Default:   activate and no session mode.

OPEN_FORM is a restricted procedure and cannot be called in the Enter-Query mode.

CALL_FORM:

CALL_FORM calls another form in a Modal window. The user cannot navigate within different Forms. Requires to exit the called form before navigating back to the calling form. Forms are called in the same session.

NEW_FORM:

NEW_FORM exits the current form and opens the new form as a parent window.

NEW_FORM releases the memory by exiting the current form.

Benefits of Multiple form Applications are:

Easier to debug small form.

Flexibility between forms.

Easy to maintain.

Modularity.

Data can be exchanged between forms.