This version of the emulator provides a new
primitive, absent from CoreTools:

  int KeyDown() 

returns (immediately) the code of the key being
held down at the moment of the call. If no key
is held down, the function returns NO_KEY_PRESSED.
This and other constants are defined in ct_windows.h,
as follows:

    const  int  NO_KEY_PRESSED = 0;
    const  int  SHIFT_KEY   =  16;
    const  int  CTRL_KEY    =  17;
    const  int  SPACE_BAR   =  32;
    const  int  RIGHT_ARROW =  39;
    const  int  UP_ARROW    =  38;
    const  int  LEFT_ARROW  =  37;
    const  int  DOWN_ARROW  =  40;

(the integer values are the actual key codes)

int KeyDown() is defined in  ct_kbd.h .
ct_windows.h  and  ct_windows.cpp  have been changed
(look at WindowProc() in ct_windows.cpp to see
the events WM_KEYDOWN and WM_KEYUP added to Windows 
events processed by the graphics window.) 

See the demo programs for examples of usage. Since
all three of main_demo0.cpp, main_demo1.cpp and
mani_demo2.cpp  contain a  main(),  only one of these
files can be a member of your project at a time.

A single file  ct_emu.h  is provided
for including all emulator headers, as a convenience:

#include "ct_emu.h"   

will now bring in all the headers.