'===========================================================================
' Subject: MOUSE AND KEY DEMO                Date: 05-27-96 (13:08)       
' Author:  Raymond Joh                       Code: QB, PDS                
' Origin:  dslayer@worldnet.att.net        Packet: KEYBOARD.ABC
'===========================================================================
'This demo is designed to integrate extended key(as well as normal key)
'functions into mouse routines. Be sure to load with the QB/L switch to
'make use of the Interrupt Calls.Though setup for QuickBasic, this code
'can easily be modified for QB.
'Author : Raymond Joh
'Status : Public Domain

'$INCLUDE: 'qb.bi'
DECLARE FUNCTION GetKeyBuf$ ()
DECLARE SUB KeyStroke (keyboard$)
DEFINT A-Z
'=========================== Demo code(Remove) ============================
COLOR 15, 9
CLS
LOCATE 1, 30: PRINT "Mouse and Key Demo"
LOCATE 3, 1: PRINT "DEFINED KEYS"
PRINT STRING$(12, "Í")
PRINT "<F1 KEY>"
PRINT "<F3><KEY>"
PRINT "<F5><KEY>"
PRINT "<TAB>"
PRINT "<ENTER>"
PRINT "<ALT><F>"
PRINT "<ALT><E>"
PRINT "<ALT><H>"
PRINT ""
PRINT "<ESCAPE> TO EXIT PROGRAM"
PRINT ""
PRINT ""
PRINT "To define your own <Hot> keys. Press any key"
PRINT "and note the ascii value below.That value will"
PRINT "need to be defined in the KeyStroke sub."
LOCATE 24, 14: PRINT "ASCII KEY VALUE";
COLOR 0, 7
LOCATE 25, 1: PRINT STRING$(80, " ");
'---------------------------- End of Demo Code ----------------------------
DO    'Remove - For demo use only
'============ Place the following two lines in your mouse loop ============
  keyboard$ = GetKeyBuf$
  IF keyboard$ <> "" THEN CALL KeyStroke(keyboard$)
LOOP  'Remove - For demo use only
END

FUNCTION GetKeyBuf$
DIM InRegs AS RegType, OutRegs AS RegType
InRegs.ax = &H600
InRegs.dx = &HFF
CALL INTERRUPT(&H21, InRegs, OutRegs)
				 ' No character ready if zero flag set
IF (OutRegs.flags AND 2 ^ 6) THEN
  GetKeyBuf$ = ""
ELSE
  IF (OutRegs.ax AND &HFF) <> 0 THEN
    GetKeyBuf$ = CHR$(OutRegs.ax AND &HFF)
  ELSEIF (OutRegs.ax AND &HFF) = 0 THEN
    InRegs.ax = &H600
    InRegs.dx = &HFF
    CALL INTERRUPT(&H21, InRegs, OutRegs)
    GetKeyBuf$ = CHR$(0) + CHR$(OutRegs.ax AND &HFF)
  END IF
END IF
END FUNCTION

SUB KeyStroke (keyboard$)
IF LEN(keyboard$) = 2 THEN
  Real.Key% = -ASC(RIGHT$(keyboard$, 1))
ELSE
  Real.Key% = ASC(keyboard$)
END IF
'============================== Demo Stuff =============================
LOCATE 25, 50: PRINT "UNDEFINED";        'Remove - For demo use only
LOCATE 25, 20: PRINT Real.Key%;          'Remove - For demo use only

'======================= USER DEFINED KEY AREA =========================
IF Real.Key% = -59 THEN LOCATE 25, 50: PRINT "<F1 KEY> ";    'F1
IF Real.Key% = -61 THEN LOCATE 25, 50: PRINT "<F3 KEY> ";    'F3
IF Real.Key% = -63 THEN LOCATE 25, 50: PRINT "<F5 KEY> ";    'F5
IF Real.Key% = 27 THEN SYSTEM                                'ESCAPE
IF Real.Key% = 13 THEN LOCATE 25, 50: PRINT "<ENTER>  ";     'ENTER
IF Real.Key% = 9 THEN LOCATE 25, 50: PRINT "<TAB KEY>";      'TAB
IF Real.Key% = -33 THEN LOCATE 25, 50: PRINT "<ALT><F> ";    '<ALT><F>
IF Real.Key% = -18 THEN LOCATE 25, 50: PRINT "<ALT><E> ";    '<ALT><E>
IF Real.Key% = -35 THEN LOCATE 25, 50: PRINT "<ALT><H> ";    '<ALT><H>
END SUB