FIX: Resuming from a Suspended Form Causes a GP Fault

The information in this article applies to:

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

SYMPTOMS

Using the RESUME command to resume from a suspended form in a Valid from a list box results in a general protection (GP) fault or an application error that causes Visual FoxPro to quit.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem has been fixed in Visual FoxPro 5.0 for Windows.

MORE INFORMATION

Steps to Reproduce Problem

1. Create and run this program:

   *Begin Program PUBLIC frm1 frm1 = CREATEOBJ('MyForm') frm1.Show

   DEFINE CLASS MyForm AS Form

          ADD OBJECT combo1 AS combobox WITH ;
          ControlSource = "x", RowSourceType = 1, RowSource = "aa,bb,cc"
          PROCEDURE combo1.valid
              WAIT WINDOW 'TRY TO CLOSE THE FORM'
              SUSPEND  && SUSPEND ADDED HERE
          ENDPROC
      ENDDEFINE
      *End program
   
   

2. Drop down the list by clicking the down arrow. Then release the mouse button, and select an item from the list. This will cause the combo box Valid code to fire and suspend the action.

   NOTE: The problem doesn't occur if the item is selected from the list by clicking the drop down list arrow and dragging down to the item by holding the mouse down.

3. When the Wait window shows up, try to close the form by double-clicking the control box in the upper left corner. On the Program menu, click Resume from the menu, or type resume in the Command window.