Hi,

First I don't know how much you know about C++,if you use C++ rarely, I suggest you to learn C++ first.C++ primer is a good book to choose.

then you must learn how to programing in windows mobile use C++.I think if you have programed in windows, it is not difficult to change to window mobile.but if you rarely program in windows ,I suggest you to read programming in windows(if you want to develop app in windows mobile,not driver).then read windows mobile develop doc is more helpful.