PRB: Top-Level Form with Intellimouse May Cause Page Fault in Windows Explorer (254465)


The information in this article applies to:

  • Microsoft Visual FoxPro for Windows 6.0
This article was previously published under Q254465

SYMPTOMS

When you use the Microsoft Intellimouse with top-level forms, you may receive the following error message:
Explorer has caused an invalid page fault in module <unknown>0000:0c2c9d90

CAUSE

This occurs with versions of Point32.exe that shipped before IntelliPoint 3.0.

RESOLUTION

Download the latest versions of the Microsoft Mouse drivers at the following Microsoft Web site:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/hid_d/hh/HID_d/km-ovr_0c5a2dc4-26d0-4fb6-9c0e-e8f218d42553.xml.asp

NOTE: It appears that this problem can also be resolved by removing the Mswheel.exe file on systems with the older software.

MORE INFORMATION

Steps to Reproduce Behavior

To reproduce this behavior, you must have Microsoft Windows 98 installed, and a version of Point32.exe prior to 3.00.0307. (Note that version 14 is prior to 3.00.0307.)
  1. Create a new project (TopForm.pjx).
  2. Paste the following code in a .prg file (TopForm.prg) in TopForm.pjx:
    loForm = CREATEOBJECT("frmTopLevel")
loForm.Show()
READ EVENTS

DEFINE CLASS frmTopLevel AS form

   Height = 106
   Width = 264
   AutoCenter = .T.
   Caption = "Top-Level Form"
   Name = "frmTopLevel"
   ShowWindow = 2

   ADD OBJECT lblNote AS label WITH ;
      Caption = "Someone ought to open up a window!", ;
      Height = 17, ;
      Left = 36, ;
      Top = 24, ;
      Width = 209, ;
      Name = "lblNote"

   ADD OBJECT cmdExit AS commandbutton WITH ;
      Top = 60, ;
      Left = 156, ;
      Height = 27, ;
      Width = 84, ;
      Caption = "Exit", ;
      Name = "cmdExit"

   PROCEDURE QueryUnload
      CLEAR EVENTS
   ENDPROC

   PROCEDURE cmdExit.Click
      IF ThisForm.QueryUnload()
         ThisForm.Release()
      ENDif
   ENDPROC
ENDDEFINE
  3. Set TopForm.prg as the Main program, and build an EXE (TopForm.exe).
  4. Run TopForm.exe from the Start Menu or Windows Explorer.
You may see the error message mentioned above.
Modification Type:MinorLast Reviewed:9/29/2006
Keywords:kbCodeSnippet kbprb KB254465
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