Title Box Rotation

No. The best Igor can do is either a drawing text item, or put a graph subwindow in the panel with a rotated annotation:

Window Panel0() : Panel
	PauseUpdate; Silent 1		// building window...
	NewPanel /W=(150,77,450,277)
	Display/W=(90,36,137,86)/HOST=# 
	TextBox/C/N=text0/O=90/A=MC "Text"
	RenameWindow #,G0
	SetActiveSubwindow ##
EndMacro

I think a DrawText command will be simpler:

Window Panel0() : Panel
	PauseUpdate; Silent 1		// building window...
	NewPanel /W=(150,77,450,277)
	SetDrawLayer UserBack
	SetDrawEnv textrot= 90
	DrawText 51,45,"Text"
EndMacro