Hi

I Have a real strange problem here,
I create a ToolWindow of an UserControl like this

---------------------------------------------------------------
 else if (connectMode == ext_ConnectMode.ext_cm_AfterStartup)
           {
                try
               {
                     string guidString =
"{91EDB65F-4B6D-440E-8032-16FD874E0F6A}";
                   Windows2 windows2 = (Windows2)_applicationObject.
Windows;
                   Assembly asm = Assembly.GetExecutingAssembly();
                   toolWindow = (Window2)windows2.
CreateToolWindow2(_addInInstance, asm.Location,
                       "CommentAddin.IdlBrowser", "Idl Browser", guidString,
ref programmableObject);

                   // If tool window was created successfully, make it
visible
                   if (toolWindow != null)
                   {
                       toolWindow.Visible = true;
                   }

               
                   
                   //toolWindow.SetTabPicture( ((System.Drawing.Bitmap)
(resources.GetObject("icon"))).GetHbitmap());
                   idlBrowser = programmableObject as IdlBrowser;
                   if (idlBrowser == null)
                       MessageBox.Show("  null");
                   tv = idlBrowser.treeView1;
                   MessageBox.Show(tv.Nodes[0].Text);
               }
            catch (System.Exception ex)
           {
               MessageBox.Show(ex.Message);
           }
         
               
           }
-------------------------------------------------------------------
Well this works ! I have a treeView on my control ,
And the messageBox shows me the correct String.
Well I catch the WindowActivated event and
the idlBrowser object is null !!  as long as I am in this slope everything
is fine , but after it the reference object
is null , how can this happen ?

Regrets ,
Jazz

url:http://www.ureader.com/gp/1545-1.aspx