How to post games with diagram?

i saw in some forum and in my group forum that people usually            

post games that they have played or some games which they wanted to share, how they do it?

http://www.chess.com/forum/view/help-support/a-guide-to-posting-your-games-on-chesscom

It's this button.  From there follow the instructions.  You can post diagrams, games, and puzzles.  For a game select the 2nd option and click continue in the bottom right.

From there the default option is entering the moves one by one "start with a blank chessboard."  If you have the fen (fen is notation for a single position and is the 2nd option) or pgn (pgn is notation for all the moves of the game and is the 3rd option) you can paste them in and they'll automatically be added into the diagram.

In your chess.com games you have to option of downloading the pgn file.  There are many free programs to view these files.  I use winboard which you can download here if you want: http://www.chess.com/download/view/winboard-427

okay thanks all of you for your feedback, i will try now

successful

Good to hear.