uses Registry;
procedure TForm1.Button1Click(Sender: TObject);
var
reg: TRegistry;
begin
reg := TRegistry.Create;
with reg do
begin
RootKey := HKEY_LOCAL_MACHINE;
OpenKey("Software\Microsoft\Windows\CurrentVersion\SETUP", false);
ShowMessage(reg.ReadString("SourcePath"));
CloseKey;
free;
end;
end;
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