abWindows 5.5 recognizes the controls and I can use them (methods and properties). LabVIEW 6i doesn't recognize it at all. When this same application was released to be only an ActiveX control, LabWindows and LabVIEW could both work with it. What happened?What do you mean by doesn't work with LabVIEW 6? Are you able to create an automation refnum for it? Is it in the list of registered servers? Do the methods and properties show up in the nodes? Do you get any error messages from the Automation Open or from the nodes? You might want to make sure you have the 6.0.2 patch before you do too much digging into this.