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How to make input parameter optional in script?<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

lb7 = Col List Box( max selected( 1 ), nlines( 1 ), onchange( b = 1 ) ),

Button Box("Ok",

specCon[7] = lb7 << Get Items;)

Lets say that I occasionally want to leave lb7 empty as it is an optional parameter, how do I do it without the script giving me an error everytime I run it?

Re: How to make input parameter optional in script?

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show( lb7 << Get Items, nitems(lb7 << Get Items));

lb7 << Get Items = {};

N Items(lb7 << Get Items) = 0;

lb7 << Get Items = {"height"};

N Items(lb7 << Get Items) = 1;