big problem with arch desktop educational banner

hi,

we have a big problem at my company.

someone here used a home copy of architectural desktop educational
version to create work drawings, then brought the files into work. when
these files are opened in architectural desktop, they display a warning
message stating they were created with the educational version.

since that time, in approximately may 2003, many DWG files on our server
have become contaminated with the "educational version" virus. the number
of files that are potentially contaminated, based on access times after
may 2003, is approximately 12,000.

we can make this problem go away by opening all 12,000 DWG files, saving
them as an older version DXF, then resaving as DWG. but, that will take
days and days even running automated all night.

so, I need vba code that will allow us to open each file in architectural
desktop, detect if the educational version warning dialog box is
displayed, act accordingly if it is, and close the file if it is not. the
problem is that the dialog box apparently pops up with a required yes or
no answer BEFORE an error is generated in VBA. the code is as follows:

Sub doit()

On Error Resume Next
Documents.Open "C:\temp\infected.dwg", True If Err Then
MsgBox Err.Number & " " & Err.Description Err.Clear
End If

End Sub

so, what I need is code that detects if a new window is displayed. I
guess I need a hook that will intercept a windows call to display the new
window. then if a new window is displayed I can use sendkeys to say
"yes" to the window.

can anybody help, or suggest another way to solve this problem?

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w'h'e'y'w'a'r'd'a't'b'e'l'l's'o'u't'h'd'o't'n'e't

thanks!