I had a form (frmMain) with the following:

 

Public A As Pane, B As Pane

 

Both are set up as follows:

Set A = DockingPaneManager.CreatePane(1, 250, 120, DockLeftOf, Nothing)
A.Handle = frmTreeViewPane.hWnd

Set B = DockingPaneManager.CreatePane(2, 800, 400, DockRightOf, A)
B.Handle = frmSelections.hWnd

frmTreeViewPane contains a shortcutbar with the following Forms that get displayed:

 

    Set ItemSelections = wndShortcutBar.AddItem(1, "Selections", frmSelectionsPane.hWnd)
    Set Item = wndShortcutBar.AddItem(2, "User Tables", frmUserTablesPane.hWnd)
    Set Item = wndShortcutBar.AddItem(3, "Reports", frmReportsPane.hWnd)
    Set Item = wndShortcutBar.AddItem(4, "Schedules", 0)
    Set Item = wndShortcutBar.AddItem(5, "Export Tables", frmExportTablesPane.hWnd)

 

When one of the shortcuts is selected, the following runs which displays the selected form on the B pane:

 

Select Case Item.Id
Case 1

    frmMain.B.Handle = frmSelections.hWnd
Case 2

    frmMain.B.Handle = frmUserTables.hWnd
Case 3

    frmMain.B.Handle = frmReports.hWnd
Case 5
    frmMain.B.Handle = frmExpDataSetup.hWnd

 

My Point......

 

While this works fine as a stand alone Exe project, if I try and convert it to an OCX, thus making frmMain a User Control it stops working.

 

Setting the handles in the user control and the handle changes in frmTreeViewPane work fine, but these ones don't work:

    frmMain.B.Handle = frmExpDataSetup.hWnd

    etc

 

I assume it's because I'm referencing the User Control from the outside.  A and B Panes were declared as public but still it returns

 

Object variable or With block variable not set

 

Does anyone have any idea where i'm going wrong?

 

Hopefully i've described that well enough but if anything is unclear please let me know.

 

Regards,

Phil