VB ActiveX DLL with user definde types

[nmoerchen]

Dear LVers,

I am seaching for a way to implement a ActiveX dll with structures in LabVIEW.

When I try to call a method with the Invoke Node functionality in LabVIEW the function name

is visible (grayed) but not selectable ...

I know, we could write a wrapper, but I hope there is any other solution.

Greetings from Germany

Norbert

[Rolf Kalbermatter]

Dear LVers,

I am seaching for a way to implement a ActiveX dll with structures in LabVIEW.

When I try to call a method with the Invoke Node functionality in LabVIEW the function name

is visible (grayed) but not selectable ...

I know, we could write a wrapper, but I hope there is any other solution.

I'm afraid not. ActiveX does not support marshalling arbitrary structure data. Since LabVIEW does completely rely on the COM infrastructure to setup and configure ActiveX nodes correctly according to the information in the type library it can't create the correct type mapping due to lack of support for defining structure types in the underlaying COM architecture. .Net seems to have support for structure definitions but that is of little help here.

Rolf Kalbermatter