Accessing User Input

The grread function returns raw user input, whether from the keyboard or from the pointing device (mouse or digitizer). If the call to grread enables tracking, the function returns a digitized coordinate that can be used for things such as dragging.

NoteThere is no guarantee that applications calling grread will be upward compatible. Because it depends on the current hardware configuration, applications that call grread are not likely to work in the same way on all configurations.