i want to add boolean indicator

[gowthamggk]

i wan to add boolean indiactor please help me frnds

[RavensFan]

Those wires are arrays of strings.  A boolean indicator is either true or false, on or off.

So what is the boolean indicator supposed to mean to you here?

[gowthamggk]

i want the list box.. also i want boolean indiacator too.. jus to indicate on or off

[RavensFan]

What is on or off?  A string is a series of text characters.  They are neither on nor off.

[gowthamggk]

its continous run operation.. i want to indicate something wen data enters to the listbox

[RavensFan · Accepted solution]

Create a boolean indicator.  Put it in a single frame flat sequence structure with the List Names property node and wire a True constant to the indicator.  Now when that frame of the sequence structure executes, the boolean will be set true the same time the data is going into the property node.

Of course you need to have a way to reset the boolean indicator to false at the beginning of the program.  So wire a False constant into a local variable of the indicator and be sure that piece of code executes at the beginning your VI's execution.