VB Studio closes by itself!

[Avatarp]

If I exit my program VB Studio shuts down now. It will dfo this everytime Once I chose to close my application I developed. It never used to do that. If I run an older program and close it it works fine. Then I reopen my current application again and run things it is fine...until I try to debug anything it starts doing it again. Anybody seen that before?

[dglienna]

Sounds like a sub-classing issue. That happens if you close the app without running thru the exit code of your app, which releases the hook.

[Avatarp]

Yeah I have been removing my error handling so I can get right to the issue with any code right now. I have been doing that for years though.

[dglienna]

Post your project, or the sub-classing parts that hook and un-hook, and we'll see if there is anything that can be fixed. Does the IDE crash if you close the app correctly (rather than clicking on the X to close a form?)

[Avatarp]

Here is some of the Code that uses subclassing to allow the Mouse Wheel to work in my grids.

Private Sub Form_Activate()
    FIRST_CLICK = True
    Call WheelHook(frmMDIChild_Service_Area_Detail)
End Sub

Private Sub Form_Deactivate()
    Call WheelUnHook
End Sub

Public Sub WheelHook(PassedForm As Form)

    On Error Resume Next

    Set myForm = PassedForm
    LocalHwnd = PassedForm.hwnd
    LocalPrevWndProc = SetWindowLong(LocalHwnd, GWL_WNDPROC, AddressOf WindowProc)
End Sub

Public Sub WheelUnHook()
    Dim WorkFlag As Long

    On Error Resume Next
    WorkFlag = SetWindowLong(LocalHwnd, GWL_WNDPROC, LocalPrevWndProc)
    Set myForm = Nothing
End Sub

[dglienna]

Take the error trap out of the unload, and place a breakpoint, to see if it's getting called. You may also want to put some code in the query unload of your form.

[Avatarp]

You think I should have the UnHook function call in my Form_Unload Event instead?

[Avatarp]

I get an error "Object doesnt support this property or method" at this line:

myForm.MouseWheel MouseKeys, Rotation, Xpos, Ypos

Private Function WindowProc(ByVal Lwnd As Long, ByVal Lmsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    Dim MouseKeys As Long
    Dim Rotation As Long
    Dim Xpos As Long
    Dim Ypos As Long

    If Lmsg = WM_MOUSEWHEEL Then
        MouseKeys = wParam And 65535
        Rotation = wParam / 65536
        Xpos = lParam And 65535
        Ypos = lParam / 65536
        myForm.MouseWheel MouseKeys, Rotation, Xpos, Ypos
    End If
    WindowProc = CallWindowProc(LocalPrevWndProc, Lwnd, Lmsg, wParam, lParam)
End Function