Visual studio ships with a utility that allows you to see the windows
messages that flow from the OS to the controls. For the life of me I cannot
remember what it is, but that's what you need to follow the mouse click from
the screen to your application.

I think I have cracked it! and it seems to be working fine for now atleast.

The solution is quite simple really, so I can't believe that its fixed, but
anyways this is what I had to:
The solution was provided by the book 'Visual Studio Tools for Office' by
Eric Carter and Eric Lippert. In the method ThisDocument_StartUp() in VSTO
solution, I had to set this.Application.ScreenUpdating to 'false' to stop
Word screen from update while my code runs.

Here it is,

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

{

//ScreenUpdate is set to false to prevent Word Screen corruption when
editing documents.

bool l_oldScreenUpdateSetting = this.Application.ScreenUpdating;

try

{

this.Application.ScreenUpdating = false;

this.ProcessMyCode();

this.Application.ScreenRefresh();

}

finally

{

this.Application.ScreenUpdating = l_oldScreenUpdateSetting;

}

}

Thanks once again for you help.

regards,

Wamiq Ansari

wamiq@msn.com