Move image using bitmap

Working on a game and I made a separate class to handle the players enemies (Its a scrolling type 90s game). I know if I use picturebox and put it on form1 I can say for example....
enemy1.Left > 90;
My question is how would I do something like that with bitmap? I figured out how to put the image on form1, but I can't figure out how to make it move.