Hello, I'm working with LabVIEW 6.1 and I'm trying to let my Application communicate with my OPC DA 2.0x Server. I enhanced my Server with a custom name space feature. This means any time a foreign OPC Client (My LV App for example) tries to access an unknown OPC tag my server dynamically adds that tag to the servers adress space. LabVIEWs data soket funktions do take variant type inputs and out puts in order to pass any type of simple data. Unfortunately, it seems like LabVIEWs variant type is not actually the same like microsofts OLE automation variant. No matter how I do pass a float value to the server, both fired events "OnValidateTag" and "OnAddTag" are not able to receive the data type number (VT_I4 , VT_R4, VT_R8 ...) of the new tag to be added. Does anybody know how to pass type save variants between LabVIEW and DCOM component so that the DCOM component is able to aquire the type of the receved variant?
Thanks a lot, Sebastian
