1. Modify the .sln/.vcxproj file yourself by text editor to allow $(Platform) == CHPE.
2. Download EWDK.
3. Open Visual Studio through SetupVSEnv in EWDK environment.
4. Open modified .sln or .vcxproj from SetupVSEnv-ed VS. (Don't open from explorer)
5. Make additional project settings.
   • [MUST] Remove odbccp32.lib from Linker -> Input -> Additional Dependencies. It's not exist.
   • [MUST] Set the General -> Windows SDK Version to $(Version_Number). The EWDK environment use discrete Windows SDK.
     • Can use the Condition element to share project in both EWDK and non-EWDK environments.
   • [MAY] Change General -> Platform Toolset.
   • [I Recommend] Change General -> Output Directory and Intermediate Directory. By default it mixes with x86.
   • [For DEBUG] Disable C/C++ -> Optimization -> Optimization. The default value is on.
   • [For DEBUG] Change C/C++ -> General -> Debug Information Format to other than Program Database for Edit And Continue. Control Flow Guard cannot be turned off.
   • [For DEBUG] Disable C/C++ -> General -> Support Just My Code Debugging. If do not turn it off, will get an internal compiler error.
   • [For DLL] Disable Advanced -> Whole Program Optimization or Add /NOIMPLIB to Linker -> Command Line -> Additional Options. If do not, will get LINK : fatal error LNK1376: /DLL and /WOWA64 are incompatible when producing an import library. Generate the import library separately.

CHPE is compiled twice. As x86, and as ARM64. X86 is used for parts that could not be compiled as ARM64 on a function-by-function (such as containg inline assembler or intrinsic function).