How To Make GroupBox Show PictureBox Image Behind It

This is for my really advanced game maker. Which is really working well. But when I went to remake the game player and speed it up, I quit painting the map on the form and the char. So my idea now is the make a picturebox on the form contain the map image and then make another picturebox on top of that one. Now the first pictreubox contrains controls the user created, very useful thats why I switched to a picturebox. And the second one contains the char,anyway, The one that contains the char needs to be able to show the controls behind it, or my game maker wont work. The char image its self is transparent but I need to make that picturebox show all the controls behind it so that if that picturebox moves onto a user control they can still see it beneath the char.