Calling C functions in Matlab for National Instruments

I'm trying to call C functions in Matlab from Installed National Instruments programs. I took a look at calling external C/C++ function but I'm still really confused with how to call these in Matlab.

I'm trying to call Serial Read and Serial Write so I can communicate with my frame grabber over Camera Link with Serial commands. I have the below functions in C to call:

rval imgSessionSerialWrite(SESSION_ID sid, const void* buffer, uInt32* bufSize, uInt32 timeout);

rval imgSessionSerialRead(SESSION_ID sid, void* buffer, uInt32* bufSize, uInt32 timeout);

rval imgSessionSerialReadBytes(SESSION_ID sid, void* buffer, uInt32* bufSize, uInt32 timeout);

rval imgSessionSerialFlush(SESSION_ID sid);

and I think I need to call imaq.dll somehow but I am really unsure. Can anyone help me with this?

Thank you in advance!