Window Menu - active documents

Hello,

I have a strange problem. Whenever I open the first document in my MDI application, it is listed as #2 on the Window menu list of open documents. The next one appears as #3 and so on.

#1 shows blank.

I have looked at all the MDIChildWindows I have created in my application and could not figure out what is causing this empty #1 in the list.

I assume that the list is updated each time OpenDocument is executed. Am I right?

I do have a child window with an OpenDocumentFile(NULL, 0) because there is no view class associated with it. Would this be the cause?

I have tried to CloseAllDocuments for this document template but I can't get rid of the empty #1.

Is there an MFC function that I can set a break point at to indicate where this list is created in the first place?

I am using Visual Studio 2008.

Many thanks