Unable to get the window handle for the 'AxToolbarControl' control

JackAllread — Wed, 19 May 2010 16:05:07 GMT

I have an ArcGIS 10 application I am coding in VB.NET 2008. I have added a MapControl and a AxToolbarControl to the form with the MapControl being a buddy of the toolbar. The form is instantiated as a MDIChild of the main form. I have a feature that removes the MDIChild from the main form and moves it to a second monitor. This function worked fine when I had the MapControl alone, but when I added the toolbar control I get the error shown at the bottom of this message. This error occurs when the following line is executed:

Me.MdiParent = Nothing

The error shows up as the MDIChild form not showing up in the second monitor with no error being thrown. I had to click on Debug|Exceptions menus items then chck "Thrown" for all exception types to capture the error.

I have been able to find that similar errors occurred in an earlier version of ArcObjects and I was wondering if that may have cropped up again?

I tried placing the control in a panel, but that didn't help.

Thanks,
Jack

-----------------------------------------------------------------
ArcGIS 10 ArcObjects

ERROR
{"Unable to get the window handle for the 'AxToolbarControl' control. Windowless ActiveX controls are not supported."}

STACK TRACE
at System.Windows.Forms.AxHost.InPlaceActivate()
   at System.Windows.Forms.AxHost.TransitionUpTo(Int32 state)
   at System.Windows.Forms.AxHost.CreateHandle()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)
   at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Form.set_MdiParentInternal(Form value)
   at System.Windows.Forms.Form.set_MdiParent(Form value)
   at V5UI.MapWindow.MoveToSecondMonitor() in P:\Projects\VS.NET 2008\V5UI\V5UI\Windows\MapWindow.vb:line 190

InnerException.Message
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Re: Unable to get the window handle for the 'AxToolbarControl' control

JackAllread — Fri, 03 Dec 2010 20:12:11 GMT

This problem was handled with the release version of ArcGIS 10 Engine.

topic Unable to get the window handle for the 'AxToolbarControl' control in ArcObjects SDK Questions

Unable to get the window handle for the 'AxToolbarControl' control

Re: Unable to get the window handle for the 'AxToolbarControl' control