can you help me which language i should stick to , and which one will be easy.
In general, if you're goal is to develop Windows Applications, you'll probably find many, many more simple examples to learn from in C# than in C++. There is a huge community around C# for Windows GUI development.
That being said, many of the concepts you'll need are the same in any language you learn. You can't really go wrong - at some point, you'll probably want to learn both langauges if you're going to program professionally (as well as others).
i think it's hard when i don't understand concept in ref books etc.
You should get a beginning programming book, not reference books, and go through it step-by-step. If your goal is just GUI development, I'd recommend a good, simple C# book, and just step through it form beginning to end, and do all of the examples. Learning from a "reference" book won't work - it's reference material, and not meant to teach concepts.