ZMODEM is not directly support in the LabVIEW environment. There are several third party utilities or code that may allow for interaction with LabVIEW. If you are able to find code, then you can build a DLL from it and reference it from a Call Library Function. If the ZMODEM utility can server as an ActiveX server then you can use ActiveX calls from LabVIEW to reference the standard. I might suggesting searchin Google or one of the other search engines for a ZMODEM utility.
