Turning a LabVIEW built DLL into an ActiveX server

[JamesRupp]

Does anyone have a list of the steps you must go thru
to convert a LabVIEW generated DLL into an ActiveX server. Do the functions become methods?

[waldemar.hersacher]

Hi James,

we have a library we deploy in three ways: as a LabVIEW library, as a DLL and as Active-X server.

In the build file for the DLL we have made each "function to call" a top level VI.

In the Active-X server each "function to call" is a dynamic VI. We created a new top level VI which will run when the server is started and stops after his window is hidden. In LV 6.x you need the winutil library to hide the window. If you close the window (through FP.Open set to FALSE) the server will stop. The window size is set to 1x1 in the VI Properties to minimize flickering on the screen during start of the Active-X server. You must check the "Enable Active-X Server" box on the "Application Settings" page in the app builder. In your client application yo
u open a reference to the server and then you can open a reference to the VI. You set/read the controls and run the VI. There is sample code for Visual Basic on the NI web site. I have also sample code for Visual C++ single and multi threaded clients.

If you are interested in the examples contact me at buero@hersacher.de and I will ask my customer to allow me to send it to you.

Waldemar