How to Check File Exists or not Using Batch File

set var=%cd%
set buildexePath="C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319"
If Exist "C:\Program Files (x86)\MSBuild\12.0\Bin" set buildexePath="C:\Program Files (x86)\MSBuild\12.0\Bin"
If Exist "C:\Program Files\MSBuild\12.0\Bin" set buildexePath="C:\Program Files\MSBuild\12.0\Bin"
ECHO Process completed
pause