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We are trying to build a Matlab GUI that interfaces with a custom instrument. We have a DLL that handles data acquisition for this instrument, and which posts a windows message to a user-defined Window handle when there is data available for retrieval.
Is it possible to catch this Windows message in Matlab and activate a callback that will communicate with the instrument DLL (using calllib) then store the data in one of the global variables in the main GUI code for display/processing/storage (the data display/processing/storage would be handled by timers or clicking other buttons on the main Matlab GUI).
Thank you, Stefan
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I think if the Windows message is a output of DLL, MATLAB sure can accept the output, but how to activate certain callback using this output will be more tricky.
To do this you will need a mex or loadable c function that creates a dummy window that can receive the messages and does the needed setup for the notifications. Doing this correctly is quite a bit of work I suggest using the Data Acquisition toolbox if it supports your hardware.