How to input a data file on a disk with mouse in OpenGL or Glut program?

I use OpenGL and Glut to display large amount of seismic waveforms. Could you tell me how to input a disk file with mouse directly to the program that is running.
examples are greatly helpful.
Thanks in advance

Geological Survey of Canada

There isn’t anything in OpenGL or GLUT to do that.
I use the functions in <stdio.h> to do all my file loading and saving.