Question

I’m coding an Outlook Add-In for Outlook 2007/2010 with c#.
Is there any event or a possibility to code something, which will be executed when the actual viewed mail changes?

For example… on the right side should be a sidebar showing contact information about the sender and this have to be refreshed every time I view another mail.

Answer 1

You should use the Explorer.SelectionChanged event to notify your addin that the user has selected a new item.

Here is the MSDN documentation.

You would hook into this event on your addins startup method like this:

private void ThisApplication_Startup(object sender, System.EventArgs e)

{
    this.ActiveExplorer().SelectionChange += () => {    
        MessageBox.Show("Selection Changed")
    };
}