Does this not explain it for you?
Known Issues with Screensavers:
It’s impossible to display a preview of your Screensaver inside the Windows Display Box with native Blitz2D. – But there are ways to solve this issue in B+ and Blitz3D. Eikon managed to access the preview window in B+. You can download his example & source here. Eddie Blitzmaniac used userlibs to archive this in Blitz3D. Grab it here.
When making a Screensaver with Blitz3D or Blitz2D a small GFX Window is visible before the Screensaver is executed. – Just ignore it. :)
It’s impossible to display a preview of your Screensaver inside the Windows Display Box with native Blitz2D. – But there are ways to solve this issue in B+ and Blitz3D. Eikon managed to access the preview window in B+. You can download his example & source here. Eddie Blitzmaniac used userlibs to archive this in Blitz3D. Grab it here.
When making a Screensaver with Blitz3D or Blitz2D a small GFX Window is visible before the Screensaver is executed. – Just ignore it. :)