Support for MS eMbedded C++ compiler

[DHearn]

Thanks, we are using EVC 4. It updates the following new registry keys instead of the ones used by EVC 3:

1) HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curr entVersion\App Paths\eVC4.exe\
2) HKEY_CLASSES_ROOT\vcpfile\shell\open EVC4\command\
3) HKEY_CLASSES_ROOT\vcwfile\shell\open EVC4\command\