Character Based Windows

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We are currently in the design phase of a character based window interface.
We would prefer not to reinvent the wheel, but the curses libraries on 
the machines we need to support are not adequate. We are willing to pay
for 'C' source, but a product that requires royalties would be a hard sell 
to management. Thanx in advance.
	
	Requirements:

	1) Attribute control. ( Underscore, Bold, etc )
	2) Color control. ( 16 colors would be adequate )
	3) Boxes for the windows. ( Control of border required also ).
	4) Standard cursor positioning, clear screen, etc.
	5) Window selection, stacking, and hiding control.
	6) Capability to read a window internal map.
	7) Correct operation on terminals with magic cookie problem.