Importing Visual C++ DLLs for use in Labview VI

[Francoisuk]

Hi all,

I try to write a little VI for the initialization of a camera. The manufacturer sent a DLL that work in Visual C++ but I'd like to use this in a Labview VI.I tried the Call Function in the advanced menu from Labview Diagram Windows, checked every parameters and it doesn't seems to work...

I found several discussion on this forum about importing DLLs from Labview to Visual C++, but nothing to answer my question?

Can anybody help?

Thanks

Francois

[RayFarmer]

Hi,

Have you tried looking at the example in the LabVIEW examples. under Help | Find Examples and Look under Communicating with External Applications | Using External Codes | Intergrating DLL's .

Also, look in the Resource Library and under LabVIEW, follow link, http://zone.ni.com/devzone/devzone.nsf/webcategories/E2A99E7E10D5725D862567AC004F0A53?opendocument&node=DZ52048_US .

Also, try the pdf help launch the labVIEW bookself and select Using External Code in LabVIEW.

Hope this provides some help to get you started.
Regards
Ray Farmer

[B_Kiddo]

Hallo Francoisuk, I have a general question. Have you managed to initialize your camera using Labview at the end? I have the same problems currently and was thinking maybe you you may share some experience how to do this

Best regards 

[Coq_Rouge]

Please be more spesific. Poste some exampels or screen shot. Need to know what kind of input the dll expect and output structure

[B_Kiddo]

I am trying to initialize my camera. pl_pvcam_init -to initialize pvcam library-works. I have problems with the pl_cam_get_name and pl_cam_open. First returns the name of the camera (string) that is used futher by the second to initialize the camera hardware.

In the header file first function is defined as rs_bool pl_cam_get_name(int16 cam_num, char_ptr cam_name).

The  Function propotype in the Call Library function(CLF) looks as  int32_t pl_cam_get_name(int16_t cam_num, CStr cam_name);

I tried to create a buffer for a string as was mentioned in the Manual. Did not work.  I tried to use instead of C string array of 8-bit integers-does not work. The strange thing is also that CLF for  return type puts always void -but I found that this is normal. For function type Bool it seems to be equivalent to int32.

I hope it's a bit more clear. I hope you may suggest me smth

Best regards 

[Coq_Rouge]

Some years since I worked with C now. But i remember that Cstr always is terminated with a zero byte(value==0). You could try insert this in your camera name string