Visual studio 2013 and qt examples OCC 6.9.0

Here it says open cascade support vs2013: "http://www.opencascade.org/doc/occt-6.7.0/overview/html/dev_guides__building__msvc.html"
But if I call bottle tutorial example with genproj.bat vc12 under "\opencascade-6.9.0\samples\qt\tutorial" I am getting
echo Error: first argument ^(%1^) should specify supported version of Visual C++,
echo one of: vc8 ^(VS 2005 SP1^), vc9 ^(VS 2008 SP1^), vc10 ^(VS 2010^) or vc11 ^(VS 2012^)
And if I also change "VCVARS=%VS110COMNTOOLS%..\..\VC\vcvarsall.bat" to "VCVARS=%VS120COMNTOOLS%..\..\VC\vcvarsall.bat" in genproj.bat, than I am getting:
error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match value '1800' in Application.obj D:\OCC\opencascade-6.9.0\samples\qt\tutorial\qtmain.lib(qtmain_win.obj)
Do I have to use vs2012 for using qt samples? Is there any step by step guide for vs2013 ?