[vb6] RTS AI NEEDED

Im working on a "starcraft" type of game, and over the last week, ive gotten a lot of stuff done. But theres one thing i just cant program to work nicely. If anyone has played a rts, I need a function or something so i can give a unit a destination, and he will move to that destination (moving around anything in his way). All scenery and building are square to simplify things, anyone could whip something up would get a lot of credit in the game, i might even sell a few games and cut ya in the profit. If noone is intrested, id be more than glad to see a few snippets posted and see what i can do myself. This is my first time getting into complicated ai. All imagry is using BitBlt, thanks all,
___
Dan