Hello,

I have C# add-in for VS2005. From this add-in I create tool
window (see code in my previous post).

I try to handle `Control.VisibleChanged' event:

// MyAddInCtrl.cs

public partial class MyAddInCtrl : UserControl
{
   public MyAddInCtrl()
   {
       InitializeComponent();
   }

   private void MyAddInCtrl_VisibleChanged(
       object sender, EventArgs e)
   {
       if (this.Visible)
       {
           // do something
       }
   }
}

// MyAddInCtrl.Designer.cs

partial class MyAddInCtrl
{
   private void InitializeComponent()
   {
       ...

       this.VisibleChanged +=
           new System.EventHandler(
               this.MyAddInCtrl_VisibleChanged);

       ...
   }
}

However, `MyAddInCtrl_VisibleChanged' handler called only
twice: when user select menu command for my add-in for the
fist time (and `_MyAddInWnd.Visible' set to `true' for the
fist time, respectively); and when IDE is closed and the
add-in is unloaded.

If I click the tool window's close button, then the window
disappears, but `MyAddInCtrl_VisibleChanged' is not called.
Subsequent calls "_MyAddInWnd.Visible = true;" from
`Connect.Exec' show the tool window back, but handler is not
called either.

How can I handle visibility changes for my tool window?

Thanks in advance
Alex