title: Wix-Installer-How can I get setup.exe's current directory?
body: <p>I'm using setup.exe and setupbld.exe (from %WixProramFolder%\bin)to make a
  bootstrapper for my installer. Everything is ok except:
  I want to get current directory of setup.exe but:</p>
  
  <ol>
  <li><p>When I use property "CURRENTDIRECTORY", I will get wrong value if I run
  command line in cmd.exe: "C:>"D:\setup.exe"". "CURRENTDIRECTORY" is "C:\"
  but "D:\" is true.</p></li>
  <li><p>When I use property "SOURCEDIR", setup.exe will extract setup.msi to
  "%Temp%{ProductID}\setup.msi" and "SOURCEDIR" is "%Temp%{ProductID}\" but
  expected is "D:\"</p></li>
  </ol>
  
  <p>Anybody can help me? It make me headache this time :-(
  Sorry about my English.</p>