MATLAB: How to use a toolbox on a C MEX s-function

toolbox on c mex s-function

Hi,
I want to do a C MEX s-function, but I need to use a toolbox that I downloaded. How can I include this toolbox on my function? (I don't have a .h this is a toolbox to matlab) If I don't want to include it. Can I send a datum from C MEX s-function to Matlab them run the toolbox on matlab and come back the datum to C MEX s-function?.
Thank.
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