>> directm('Matlab')
??? Invalid MEX-file 'C:\Program
Files\MATLAB\R2008a\toolbox\directm\directm\directm.dll': The specified module
could not be found.
The toolbox works fine it is just the documentation that is a little poor. You just need to pass the initialisation function an actual window name. The easiest way to do this is to call "figure" which creates a blank figure window before initialising the toolbox. The name of the newly created window will be "figure x" where is 1, 2, 3 etc depending on how many figure windows you have open. Once this is done you just create a new effect and start it. Very easy to control and gives you access to all the force feedback parameters.