The information in this article applies to:
- Microsoft Visual Basic Control Creation, Learning, Professional, and
Enterprise Editions for Windows, version 5.0
SYMPTOMS
When working in the Microsoft Visual Basic 5.0 IDE, you may receive the
following message:
"Application Error:
The instruction at "0x0f019262" references memory at "0x00000000".
The memory could not be "read."
This occurs when testing applications in the Visual Basic 5.0 IDE that pass
menus to custom ActiveX controls.
RESOLUTION
The error does not occur once the container application is compiled.
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
- In a new ActiveX Control project, add the following code to the
control:
Option Explicit
Dim oMnu As Object
Private Sub UserControl_MouseDown _
(Button As Integer, Shift As Integer, X As Single, Y As Single)
Select Case Button
Case vbRightButton
If Not oMnu Is Nothing Then
PopupMenu oMnu
End If
End Select
End Sub
Public Sub newMenu(mnu As Object)
Set oMnu = mnu
End Sub
- Name the control "PopupMenuCtl."
- Name the control project by clicking Project Properties from the
Project menu. Set the Project Name field to "TestControl" (without
the quotes).
- Save the project and compile the control.
- In a new Standard EXE project, add the control to the project by
clicking Component from the Project menu and turn on the option for
the new control called "TestControl."
- In Form1, draw an instance of TestControl.
- Add a menu to the form by displaying the form and selecting Menu
Editor from the Tools menu. Add the following menus:
Indent Caption Name
none "&File" "FileMenu"
1 "&Test" "FileMenuTest"
- Add the following code to Form1:
Option Explicit
Private Sub Form_Load()
PopupMenuCtl1.newMenu FileMenu
End Sub
- In the Visual Basic IDE, press the F5 key to bring up Form1.
- Right-click in the area occupied by the ActiveX control.
|