How to Determine the Active & Previously Active Forms

• Microsoft Visual FoxPro for Windows, versions 3.0 and 3.0b

SUMMARY

The command _SCREEN.ACTIVEFORM.NAME tells you the name of the active form. There is another way to determine the currently active form and to determine which form was active before the current form.

MORE INFORMATION

1. Create three forms (Form1, Form2, and Form3).

2. Open the debug window and type the following:

   _SCREEN.FORMS(1).NAME _SCREEN.FORMS(2).NAME _SCREEN.FORMS(3).NAME _SCREEN.ACTIVEFORM.NAME _SCREEN.FORMCOUNT

3. Inside the Command window, type the following:

   DO FORM FORM1 DO FORM FORM2 DO FORM FORM3

   Note the following from the debug window:

      _SCREEN.FORMS(1).NAME         FORM1
      _SCREEN.FORMS(2).NAME         FORM2
      _SCREEN.FORMS(3).NAME         FORM3
      _SCREEN.ACTIVEFORM.NAME       FORM3
      _SCREEN.FORMCOUNT             3
   
      Note that _SCREEN.FORMS(3)= _SCREEN.ACTIVEFORM
   
   

4. Select Form1, and note the following changes from the debug window:

      _SCREEN.FORMS(1).NAME         FORM2
      _SCREEN.FORMS(2).NAME         FORM3
      _SCREEN.FORMS(3).NAME         FORM1
      _SCREEN.ACTIVEFORM.NAME       FORM1
      _SCREEN.FORMCOUNT             3
   
   

Notes

_SCREEN.FORMS(_SCREEN.FORMCOUNT) always references the active form object.

_SCREEN.FORMS(_SCREEN.FORMCOUNT).NAME references the name of the active form.

_SCREEN.FORMS(_SCREEN.FORMCOUNT).CAPTION references the caption of the active form.

_SCREEN.FORMS(_SCREEN.FORMCOUNT -1) always references the previously active form object.

_SCREEN.FORMS(_SCREEN.FORMCOUNT-1).NAME references the name of the previously active form.

_SCREEN.FORMS(_SCREEN.FORMCOUNT -1).CAPTION references the caption of the previously active form.