Ok, As an alternative to talking directly to .dll files in MATLAB, i have also managed to get MATLAB to work with DDE in the exact same way as the excel example dde_piclog_multi_chn_927.xls provided by PICO tech. The requirements to collect data by DDE in MATLAB is that piclog is open and all of you...

oh i forgot to log in, thats why i couldn't upload a file. Oh well.

Just as a side note to the above, i also tried importing the USBACD11Api.h as the header file used by matlab, but it also gave the same results.