Getting screen coordinate of a window

[Michael Grunditz]

Hello!

Can I get screen coordinates of a window? I would like to be able to 
caputure absolute mouse events and convert them to the window coordinate 
system. I don't want to have relative mouse movement like I see in many 
examples. In my context it doesn't work very well.

BTW the handle_relative_motion never seems to return anything. Is there a 
configuration that I need? Would be terific if I could by some function 
get window internal coordinates, but handle_relative_motion might not be 
something for that?

I also want to know if there are routines better suited  than memcpy for 
ploting large buffers? I have noticed that if I put something in a loop 
without a little delay the system crawls. Is the Gui not preemptive? As 
little as 10ns is enough.

I plot 640x480x4. It acts a bit strange. Each second a frame takes less 
than 1/60 seconds. There are 3 frames that runs slower and back to quick.

I have nano sleep that is based on that timing.

/Michael