Build EDK2 on Window 7 and 8

1. Platform: Windows 7 or 8.
   Compiler: Visual Studio C++ 2008 Express. https://go.microsoft.com/?linkid=7729279
2. Download source frrom EDK2 web site. https://github.com/tianocore/edk2
3. Download EDK2 Basetools source. https://github.com/tianocore/edk2-BaseTools-win32
    
4. Unzip above 2 compress file.
5. Open Windows Command Line to build the EDK2.
6. Change to folder D:\edk2-master  (The EDK2 source location directory).
7. Windows Command Line:
   
   D:\edk2-master > set EDK_TOOLS_BIN=D:\edk2-BaseTools-win32-masterD:\edk2-master > edksetup.bat
8. After the "edksetup.bat" command, it will produce some files in Conf directory.
   
   build_rule.txt
   target.txt
   tools_def.txt
9. Modify the file "target.txt"
   TOOL_CHAIN_TAG = VS2008x86
   
10. Windows Command Line: (Change folder to D:\edk2-master > )
    D:\edk2-master > edksetup.bat --nt32
    D:\edk2-master > build

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[Note 1]
1. Error: can not find "windows.h".
   Go to the directory where the VS2008 was installed. 
   C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\ToolsC:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\Tools
   Modify "vsvars32.bat" in administrator mode at Line 35.
   set WindowsSdkDir=C:\Program Files\Microsoft SDKs\Windows\v6.0A\(Orginal WindowsSdkDir can not find "windows.h", no Windows SDKs installed)
2. Re-run step 7 to step 10 at the above section.
[Note 2]
    Windows Command Line:

    C:\ > set 
    (see all system variable setting)
    checking "VSCoMMONTOOLS"