How to set path for VS-2012 Express

Hi,

I want to use Aspnet_regiis.exe command tool to learn about Encrypt ConnectionStrings in ASP.NET.

But, since I am using VS-2012 Express edition, I don't have Visula studio command prompt.

I know that we can set path to Windows 7 Command prompt to make work with Visual Studio 2012, but I don't know how to do the same.

Can anybody please suggest me how to do this so that I can use windows 7 command prompt.

Thanks in advance,