Finding a logical name for PXI5112 modules to be used in niScope_Init

Question

I need to dynamically allocate the number of PXI5112 modules on several PCs in a C++ program. After going through great length using VISA calls to obtain the VISA logical name ( PXI3::11::INSTR, etc.), I found out that niScope_Init is expecting an IVI or DAQ logical names. How does one go about to get the logical name for those PXI modules so niScope_Init can use? Hardcoding the name such as DAQ::1 is out of the question because the number of modules is different from test to test. Thanks.
Software:
niScope driver: 2.6
Microsoft Visual studio.net 2003
Measurement Studio 7.0
Windows XP SP2
Hardware:
Group1 : 5 PXI5112s
group2 : 3 PXI5112s
group3 : 7 PXI5112s

Answer 1

Here's a quick and dirty example of how to use the niModInst API in C:
ViSession sessionHandle = VI_NULL;
ViInt32 numberOfDevices = 0,
i = 0;
ViChar deviceNameBuffer[256] = "";
niModInst_OpenInstalledDevicesSession(
"niScope",
&sessionHandle,
&numberOfDevices);
for (i=0; i < numberOfDevices; i++) {
niModInst_GetInstalledDeviceAttributeViString(
sessionHandle,
i,
NIMODINST_ATTR_DEVICE_NAME,
256,
deviceNameBuffer);
printf("%s\n", deviceNameBuffer);
niModInst_CloseInstalledDevicesSession(sessionHandle);
The device names that you're printing out in this example can be used as the resourceName input to the niScope_init function.
In practice, though, be sure to check the status that is returned from each function. You can get further information about an error using the niModInst_GetExtendedErrorInfo function. All the functions I used above can be found in the niModInst.h file.
Hope that provides some more help.