Ken,

You are correct, the add-in is not loading multiple times, the CTP is.

With regard to the Window property, I do not want to interfere wth any other
outside CTPs, so unless I am misunderstanding your suggeston, not sure that
would work.

Any other ideas?

Thank you.

"Ken Slovak - [MVP - Outlook]" wrote:

So you don't have multiple instances of your addin loading as your subject
says?

Why not check each task pane that might exist and compare the Window
property to the Explorer? Outlook 2007 allows direct comparisons of that
property.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007.
Reminder Manager, Extended Reminders, Attachment Options.
http://www.slovaktech.com/products.htm


"Paulem0071" wrote in message
...
All,

I am using a CustomTaskPane (CTP) wth Outlook 2007 and VSTO. The CTP loads
as a sidebar on the right side of the screen.

My issue is that sometimes two of the CTPs load. Here is my
ThisAddIn_Startup
code (note the attempts at prevention of duplcate CTPS)

Outlook.Explorer explorer = this.Application.ActiveExplorer();
if (this.CustomTaskPanes.Count 0)
{
foreach (Microsoft.Office.Tools.CustomTaskPane ctp in
this.CustomTaskPanes)
{
//if already here, use it
if (ctp.Title == "MyTitle")
{
myCustomTaskPane = ctp;
}

}
}
else
{
//make a new one only if one does not exist
if (taskPane == null)
{
taskPane = new MyTaskPane();
myCustomTaskPane = this.CustomTaskPanes.Add(taskPane,
"MyTitle", explorer);
}

}

Thanks for any advice in advance!