Where is the command line for qmake commands?

I am using Qt 4.6.2 on Windows Vista and have completed my first project which I want to install on Symbian devices. I am using qmake for the first time. I see this statement in the documentation: 'You can now use qmake to generate a Makefile for your application. On the command line, in your project's directory, type the following:

qmake -o Makefile hello.pro'.

Please tell me how to get to this command line. Is it part of Qt or part of Windows.

Ehm, Start -> Run -> cmd (return)?