One trick I've used is to use the current top-level form. The idea is to hide all current controls, make the form full-screen, run the report, put the form back to original size and show its controls.

WITH ThisForm
	.LockScreen = .T.
	.Closable = .F.
	.SetAll( "Visible", .F. )
	.WindowState = 2
	.LockScreen = .F.

ENDWITH

* Experiment with the following KEYBOARD commands to force full-screen report preview (may need 1, 2, or ?)
KEYBOARD "{CTRL+F10}"
KEYBOARD "{CTRL+F10}"
REPORT FORM ( tcReport ) TO PRINTER PROMPT PREVIEW

WITH ThisForm
	.LockScreen = .T.
	.Closable = .T.
	.SetAll( "Visible", .T. )
	.WindowState = 0
	.LockScreen = .F.

ENDWITH

I don't know if this gives you the toolbar you want. It's tricky to get it to work just the way you want, I won't be providing any further support for this code.