Open COM type libraries from VB6 dll on labview

[Joao_Luiz]

Hi All,

I have a third part DLL generated from VB6 and I am trying to access its functions using the "Call Library Function" Block.

When I select the Library Path, I cannot see the Function that I want on the "Function name" field but if I type the function name, it automatically generates

the parameters as defined on the VB6 file, but I keep seeing the broken arrow and the error "Function not found in library".

I Know that the function is defined as a COM type library because I tested on a Dll Viewer software called "DLL Export Viewer".

Do you guys Know a way to access this function? Thanks.

[Dennis_Knutson]

Using the Call Library Node for COM/ActiveX makes no sense. Why do that instead of doing the correct way with calling its ActiveX properties and methods. The Call Library Node is for c type dlls.

[Joao_Luiz · Accepted solution]

Hi Dennis,

I am new using the DLLs in LabView, thanks for your reply.

To solve my problem I created an "automation refnum control" on my front panel and then browsed for the DLL file. After that I just used the Invoke/Property nodes for ActiveX files as you mentioned to access my functions.

Thanks for your attention!