I suppose pressing K_ESC (chr(27)) during a READ will ends
the read WITHOUT firing the VALID functions of the GETs.
But lately, I found that wasn't the case in my screens,
notably those generated by GENSCREEN. The VALID functions
were fired even if I pressed K_ESC (during a READ CYCLE).

I couldn't reproduce the adnormal behaviour if I wrote
a simple program, like this one:

* main()
m.xx = 0
@05,05 get m.xx valid v_xx()
read cycle
return

function v_xx
wait window "haha"
return .t.

Have you ever heard of this adnormaly? For the meantime,
I need to insert codes to check for K_ESC in all VALID
functions.