Vb.net picturebox快速移动滞后

When I has pictureboxes that move relatively fast at different speeds through the form on a relatively good computer it runs alright, but when I go onto a slightly worse computer, it lags if there are more then three pictureboxes moving at fast speeds on the form.Im not sure if this has anything to do with doublebuffering, could someone explain to mewhat doublebuffering is? And how I could fix my problem? The picturebox isn't a picture, just has its backcolor set to blue/red/green.When I has pictureboxes that move relatively fa