BUG: Closing a Form with Control Box "X" Only Hides Form

• Windows CE Toolkit for Visual Basic 5.0, version 1.0

SYMPTOMS

Closing a form with the control box "X" only hides the form. When showing the form a second time, values that that may have been changed on the form are not reset as you would expect. Properties that may have changed (including the form caption, text in textboxes, window position, and the hwnd of the form) remain the same.

Although it can seem to be a related issue, it is important to note that in Visual Basic, it is expected behavior for form level variables to remain in memory when a form is closed using the control box "X."

RESOLUTION

The workaround is to include code to re-initialize the form in the form load event, which does fire when the form is re-shown after being closed via the control box "X."

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

1. Open a new Windows CE project in Visual Basic 5.0. Form1 is created by default.

2. Add another form (Form2) to the project.

3. Add a CommandButton (Command1) to Form1.

4. Add a CommandButton (Commend1) and a Textbox (Text1) to Form2.

5. Paste the following code into the General Declarations section of Form1:

         Private Sub Command1_Click()
            Form2.Show
         End Sub
   
   

6. Paste the following code into the General Declarations section of Form2:

         Private Sub Command1_Click()
            Form2.Caption = "changed"
            Text1.Text = "changed"
            Command1.Caption = "changed"
         End Sub
   
   

7. Press the F5 key to run the project. Click the CommandButton on Form1 and note that Form2 appears. Click the CommandButton on Form2 and note that various values change.

8. Move Form2 to another position. Click the Control box "X" on Form2 and note that Form2 disappears.

9. Click the "Show2" button on Form1 and note that the form reappears in the position where it last was, with the form caption, command button caption, and text box text values it had before being closed.

Keywords          : vb5all vbce
Version           : WINDOWS:1.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbpending