How do you port a emulator from the PC to the DS

What i need to learn this..?
Do i need to learn c++ or something..
Please help..?

*bump*

Please don't double post you will just end up with an infraction. To port you will need some knowledge of coding and it's an extremely difficult process.

I have downloaded Palib and devkitpro can i do it with that..?

It is a lot more complex than that!

also you need the source code of the emulator for porting it to a console or handheld.

You need to understand how that emulator works.. You can't just "convert" it to PSP.