I want to copy code from notepad and want to paste it in heroku VIM.I tried many methods and done alot of googling . How to achieve this ??
If you want random strangers to help you, you should be a little more helpful yourself. What methods did you try? What was the outcome? What worked? What didn't?
Assuming you are connected to a remote server via SSH, the usual method is to paste with a click on your mousewheel or use your terminal emulator's "paste" function. The result is often horrible and you must issue :set paste in Vim before pasting, and :set nopaste after pasting.
See :h pastetoggle for a more convenient solution.
I share others' confusion about what you are asking, but a common complaint about Vim is that by default it does not share the system clipboard. By default yanking and putting uses the unnamed register, but you can specify a different register if you wish.
The system clipboard is accessed via the + or * registers (depending on the system). On Windows (as far as I know) they are equivalent. For a one-off pasting operation you can specify one of these registers to paste from using "+p or "*p instead of the usual p. (Note that the "+ or "* specifiers can also be used for yanking, and several other Normal mode operations.)
If you ALWAYS want to use the system clipboard, you can set the option
set clipboard=unnamed
However, this may not have anything to do with your question.