We are trying to open an XML file called "documentation.udcdoc" using the
DTE model. In Visual Studio we have also associated the ".udcdoc" file
extension to a custom tool (.exe).

When we try to open the text editor using the following code, it opens our
custom tools instead of the text editor.

EnvDTE.Window CurrentFile =
DTE.OpenFile(EnvDTE.Constants.vsViewKindTextView,
System.IO.Path.Combine(currentTemplatePath, source) );

Is there any way to force Visual Studio to open the ".udcdoc" extension
files with the text editor?

Thanks in advance

Xavier