Inventory Help

I have been really trying to get the Drag and Drop in my inventory system but all documentation doesn’t fit with my inventory system. I have looked everywhere and cant find anything that can help me for my problem. I would really appreciate it if someone could contact me and take a look at my problem. Unfortunately i dont know where the problem is so i wont post any screen shots here. My Steam is Steam Community :: Error and my Skype is harry812143.