Little suggestion

I’m suggest this changes to make possible emulate keypad events on win32 platform.

Shift+F1 emulates Back key pressing and Shift+F2 emulates Menu key pressing.

Ok, I will test it tomorrow. If it works, I will merge it.
Thank you.

This feature rocks!
Ming, if code review passed, please don’t forget to create an issue to trace this feature, otherwise we possibly forget to add this item in our changelog.

Ok, I will do it.