windows - Setting and using an environment variable in the same command -

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i using windows 7 , want set environment variable , use in same command.
specifically, want execute following 2 commands simultaneously single command-: 

set mypath="c:\program files (x86)\microsoft visual studio 11.0" %mypath%\vc\vcvarsall.bat

in other words, want windows version of this.
i've tried far -:

set mypath="c:\program files (x86)\microsoft visual studio 11.0" && cmd.exe /c "%mypath%\vc\vcvarsall.bat"

but isn't working.
so, there way of doing in windows ?

this can done writing -: 

cmd.exe /x /v:on /c "set mypath="c:\program files (x86)\microsoft visual studio 11.0\vc\varsall.bat" && !mypath!"

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