pass parameter to functions called from dll

[paly_Andrew]

Hi All, 

I am interfacing a PMC-100 motor controller via Performax protocol using labwindows. 

I need to link PerformaxCom.dll explicitly and call some functions from it. I am trying to call this function

BOOL fnPerformaxComOpen(IN DWORD dwDeviceNum, OUT HANDLE* pHandle);

- This function is used to open communication with the Performax USB module and to get communication handle. Index number starts from 0.

I tried this way to call another function which just have output and it worked. http://digital.ni.com/public.nsf/websearch/8AE57BDA995ACCB486256AEA0062B3C6?

But the problem is that I don't know how to pass parameter to it. 

Thanks a lot!

Tianchi

[Al_S · Accepted solution]

Tianchi:

If you want to explicitly link, you can look at this article: http://zone.ni.com/devzone/cda/tut/p/id/8503

It has a snippet of code which shows passing two parameters to a DLL function.

But regarding your statement that "I don't know how to pass parameter to it", in the example you reference, you are passing a parameter: it's just a string constant rather than a variable.

[Tina2402]

Hi,

Thank you, that link was helpful. I turned out that i didn't typedef the function right. So I could not pass two parameters to the function.