Ola, Rudolf wrote: > Are you sure DisableUpdates() is not just preventing the drawing to > occur at all? (blocking aquiring of some system internal semaphore or > something..) > Then, after Updates are enabled again all threads are executed asap? > (I of course don't know what I'm talking about from your perspective. > The only way extra buffers are created currently is in main mem: that I > can tell you for sure.) Nope. I can tell for sure that it suppresses _UPDATE_ messages to BWindow objects, and thus BView::Draw() won't be executed anymore and no drawing is done for that window. Adi.