Your question is very vague You don't specify what kind of effect you're trying to achieve, and you also don't say what API you're using, or if its 2D or 3D.
Got darn i havent used vb in awhile im back to usin it now and my game is almost done i'll post the site up here lata when the game is reafy for testing the game is called Destrction Online....
The combination of having troubles creating a warp effect and a game named "Destruction Online" kinda scares me =P I have one simple question: "ORE?" =D