Running the following code (within EXCEL 2000) I get a
Application Error.
Code:

Public Declare Function GetCommandLineA Lib "Kernel32" ()
As String

Sub probe()
Dim s As String
s = GetCommandLineA
MsgBox s
End Sub

Error:
The instruction at "0x77e87af2" referenced memory
at "0x00190000". The memory could not be "read".

The strange thing is that using this code within Word 2000
it works perfectly well. And to carry this to extremes, I
have a Excel file containing such code which works. But if
I save this program via Excel under a new name, the copy
produces the same error as described above.