First thing you stumble upon on google would be this:
http://www.cplusplus.com/doc/tutorial/ And in general this website
Read through those tutorials, try writing some simpler algorithms using visual studio and windows console application setting, print some messages and numbers. Just to simplify everything and save yourself a headache of setting up window and starting up graphics.
Then when you feel like you tried everything in tutorial, set a new goal, like create a pong or arcanoid, or invaders game, or simple one-room platformer arcade, and ask here on this forum again. We'll help you picking a good graphic library, and tell you first steps to start with it.