What kind of Code?

Yes. And No.

- You can't code for Macs on a Windows machine.

- If you do get a Mac:
download Xcode from the Mac Apple Store
join Apple's Mac (or iOS) developer program
buy Cocoa Programming for the Mac - Hillgrass
run through the book
join a club or get a programming buddy

- when you make your first million dollars, don't forget your old friends (and maybe throw a few bucks my way)

 

Not entirely true. You can program for Macs using Python, Java or C++ or any number of other languages.

If you want to do cross platform programming I'd recommend using C++ and the Qt framework or using Java and the Swing framework. Both of those options will enable you to program for Windows, Mac OS X and Linux at the same time.

 

Of course one can write code for Macs on a windows machine. It's very easy using platform independent languages and libraries like python and java. But in principle it's also possible to write Objective C code that makes use of the Cocoa library... it's just highly inconvenient, since the interface builder can't be accessed and one still needs a OX machine to compile the code.