Edward,
Sorry, if I fail to reply immediately on your graceful assistance. I tried the code, but I still couldn't dock the print toolbar.

Maybe I'm missing out something. The print toolbar was at the top of the Preview Screen but did not actually docked. So its small close button still shows up.

The NOWAIT clause caused the remaining of my codes to execute, like making the system toolbar and the form, that launched the Preview Screen, to appear.

Maybe you could help me with another approach.