Compensation a text control

Hello, first let me say that I am new to Labview, but worked with it for a little while now and starting to get the hang of it.  The project that I am working on is one GOES for a test system for a bunch of cables, each serialized.  The idea is that the user selects a directory, and then for each test between a serial number while the VI enters data (from a network Analyzer) and written in a text file in the directory selected with the name being the serial number with the .txt extension.

I have this works pretty well, but we would like to integrate a code scanner barcode.  We have a bunch of scanners that emulate USB keyboards, so it is easy to create a user click in the text for the serial number control and scan cable.  However, we would also be able to have so that the user does not need to do anything other that connect the cable and the scanner.  Have the scanners are set up to add a newline at the end of the number it just scanned, basically simulating hitting the Enter key.  I put the button that I use to trigger the test to fail over to the entrance, so just scan bar code will begin to try and save the data.  However, it will not erase the text control; on the contrary, the previous serial number is in there while the new one is appended to the end.  How can I clear this field programmatically?

Write an empty string to the local variable of the control.

Tags: NI Software

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