[Samba] hide directories in samba

[himmat baldaniya]

hello 
how to hide directories in samba???
for example-
	 i have share "mrt" and mrt consists of mrt1 and mrt2 subfolders, so what i have to do is that i dont want the user (who logs into mrt) to view  mrt1 and mrt2..
so how to do that plzz help ???
thankyou 		 	   		  
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