PHP: 'Microsoft Build Tools'?

You'll need Visual studio to build PHP from source, but there are prebuilt
binaries available here: http://windows.php.net/

Hi Internals,
do you have some time to help me out?

Quoit the PHP readme
"
The Win32 Build System.
$Id: README.WIN32-BUILD-SYSTEM,v 1.4 2003/12/23 02:51:18 wez Exp $

• 1.* How to build PHP under windows

•  a.* Requirements
  
        - Microsoft Build Tools from:
          Microsoft Visual Studio (VC6) or later
  

"
Microsoft Build Tools? Is this a .exe file on the Microsoft site?
Do I need to Install all of Microsoft Visual Studio to use PHP?

I'm a bit lost here,
Thanks for your time.
Marcus