Found: C:\cygwin\usr\X11R6\bin\XWin.exe
C:/cygwin/usr/X11R6/bin/XWin.exe
  C:\cygwin\usr\X11R6\bin\cygX11-6.dll
    C:\cygwin\bin\cygcygipc-2.dll
      C:\WINDOWS\cygwin1.dll
        C:\WINDOWS\SYSTEM\ADVAPI32.DLL
          C:\WINDOWS\SYSTEM\KERNEL32.dll
  C:\cygwin\bin\cygfreetype-6.dll
    C:\cygwin\bin\cygz.dll
  C:\WINDOWS\SYSTEM\GDI32.dll
  C:\WINDOWS\SYSTEM\SHELL32.DLL
    C:\WINDOWS\SYSTEM\USER32.dll
    C:\WINDOWS\SYSTEM\COMCTL32.dll