How to call VSTEST.CONSOLE.EXE from batch file

I have unit test class library.

 ABC.dll

Now i have to execute it form .bat file..

 start %comspec% /k ""C:\Program Files\Microsoft Visual Studio 12.0\VC\vcvarsall.bat"" x86 

now i have to add my dll ... with it like

VSTEST.CONSOLE.EXE C:/ABC.dll /logger:trx

how can i acheive this .. Kindly guide me