Yeah it will be great to use xna or directX to draw the enemy and then to control it,but my project is inside form and there is picturebox I load the camera image and when the camera see a special marker, replace it with a tower just like the game here : http://www.ardefender.com/.
and in order to add enemy which attack the tower(marker) i need to draw all the enemies on camera image to create augmented reality game. (the point is that i dont want to create 50 picturebox on camera image and control them.)
Is there a way to implement my form code inside xna , I mean to implement the part with the camera image and then my code for recognizing special marker and replaced it again with a 2D model ?