Can't delete Registry key

I have been attempting to get a program to find certain keys in the 
registry and delete them.  I have very little experience of Registry 
programming, and I must have misunderstood something, because I 
cannot manage to do this.

I am using Delphi 7 on Windows XP.

I have a TRegistry object called Reg, and, in an attempt to track 
down my error, I have produced the following debugging version of my 
deletion code:

if Reg.OpenKey(SKey,False)
then
  begin
    if Reg.DeleteKey(SKey)
    then Memo9.Lines.Add('Key deleted')
    else Memo9.Lines.Add('Not deleted');
  end

The text 'Not deleted' is added.  Clearly the key was successfully 
opened, but not deleted.  I have searched in the Delphi Help and 
can't find any clue.  The example given in Delphi Help to illustrate 
DeleteKey uses:
  Reg.OpenKey(Edit1.Text,False)
followed by:
  Reg.DeleteKey(Edit1.Text),
which is essentially the same as what I am doing.

Any help?

 Michael Davis


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