PRB: Error 371 or 404 Occurs When Using the Show Method

MORE INFORMATION

While you can specify the owner of a form as one of the parameters in the Show method, you cannot designate an MDI Child form as an owner of another form.

Steps to Reproduce Problem

1. Start a new Standard EXE project in Visual Basic. Form1 is created by default.
2. Add a CommandButton to Form1.
3. Add an MDI form and a second form to your project.
4. Set the MDIChild Property of Form1 to True.
   
   NOTE: To reproduce the error #5, set the MDIChild Property of Form2 to True as well.
5. Copy the following code to the Code window of Form1.

         Option Explicit
   
         Private Sub Command1_Click()
            Form2.Show vbModal, Me
         End Sub
   						

6. Press the F5 key to run the program. Click the CommandButton and the error occurs.

(c) Microsoft Corporation 1997, All Rights Reserved. Contributions by Arsenio Locsin, Microsoft Corporation