How to check Mouse click timing?

Hi All,

I have recently started programming with Psychtoolbox. I have an RSVP program, in which i need to know the time of a mouse button click whenever a letter is displayed. I did try using GetMouse function, but was not able to get the timing everytime i clicked the mouse button. So i wanted to know what funcitons i should use to know the time of a mouse button click.

Thanks & Regards
Bharath