inapp can been a bit complicered due various checking,but have tried to keep it simple in the end. For controllers, its just using command like that in a function:
IF GameControllers("Up", 0) THEN RETURN TRUE // 0 = Player 1, 1 = Player 2
And doing this line, before or after your SCREENSHOW command:
GameControllers("Update")
That asume of course you got the new SDK working, which can using the full SDK download from this link (this include a bit older ANDROIDEXTRAS throught):
http://www.glbasic.com/forum/index.php?topic=9341.0
Howover if its a unknown controller, the game might want to remap it.