PRB: Modal Form in Form Set Behaves as a Modeless Form

• Microsoft Visual FoxPro for Windows, version 3.0

SYMPTOMS

A modal form contained in a form set does not behave as a modal form. In other words, it is possible to activate other windows when this form has the focus.

CAUSE

The form is contained in a non-modal form set. The modality of the form set takes precedence over the modality of a form it contains.

WORKAROUND

Forms that are to be modal cannot be in a form set that is modeless. Place modal forms in separate form sets, or do not add modal forms to form sets. Note that you can cycle through forms that are included in a modal form set, but cannot interact with any window that is not contained in the form set.

STATUS

This behavior is by design.

MORE INFORMATION

Use the Parent property of the form object to verify that it is contained in a form set. For example:

   IF TYPE('Thisform.parent')="O"
      ? "The form is contained in a Form set"
   ELSE
      ? "The form is not contained in a form set"
   ENDIF

Steps to Reproduce Behavior

1. Create a form.

2. From the Format menu, choose Create Formset.

3. From the Format menu, choose Add Form.

4. In the property sheet for Form1, change the WindowType property of Form1 to Modal.

5. Note that the WindowType property of FormSet1 and Form2 is Modeless.

6. Save and run the form.

REFERENCES

It is also possible to affect the modality of a form with the SHOW method. For more information about the SHOW method and modal forms, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q130308
   TITLE     : PRB: Using SHOW(1) Does Not Make a Form in a Formset Modal