[racket] How to pass <(box unsigned-int)> to com-invoke?

My try:(com-invoke fsc "Connect" "" (box +0))exact error:Connect: expected argument of type <(box unsigned-int)>; given: '#&0How to pass <(box unsigned-int)> to com-invoke?
stackoverflow: http://stackoverflow.com/questions/21038482/how-to-pass-box-unsigned-int-to-com-invoke 		 	   		  
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