How can I use two ports in the same time?

My application need one pc use two ports the same time.But when I open one port and my systerm is running the other port can't be opened.
I use the frame API in VC++6.0.
My OS is win2000 server;
The functions I used are ncOpenObject();

Hi DickW
Thank you for your help!
I have tried the example.But the example shows how to connect one CAN network with two ports.
I want each port connect to the net can both read and write;
I want to apply the function like this:
1.config the port1 and port2
2,open port1 and port2
But after I open port1 or port2 the other port can't be opened;
After I open the second port it always returns negative.
In the codes I use CAN0 and CAN1 as the CAN objects.
Attachments:
twoport.zip ‏1184 KB

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