MaRine

Thank you very much. It's the one I want.

I want to create a tree control which looks like windows resource explorer. Is there anybody can give me some idea? Many thanks in advance.

QUOTE (tcplomp @ Jun 30 2008, 05:07 PM) Sorry for my English. Maybe I have not descriped the problem easy to understand. The problem seems like some steps of enum run twice but not the printer problem. I just want to ensure if the 'print' step run twice by trying to change time string at label.

I am using LV7.1. I customize a type def enum control and use it as a queue element. There are several steps in this enum control such as initial, scan label, print, write database and so forth. I think it is a common use in LV. Now I have a problem with 'print step'. I am using Zebra printer(model ZM400). It will print out two same labels some time. At first I suspect that I send the print command twice.So I increase the time delay to 500ms every step Because there is time string at label( format as 20080630143856). If I sent two commands, the time will be defferent after several steps. I have try print label using other application. There is no such problem. So I think the Printer is OK. I aslo search help from this forum and this address: I have disconnect enum constant from type def control but there is no use. Is there anybody who can help me? Thank you in advance.