Key codes can be found here:

http://www.appgamekit.com/documentation/guides/scancodes.htm

//by Qugurun

do
  if GetRawKeyPressed(27)  //Esc
     Exit                  //Close App
  endif
loop

// Exit when Escape key has been pressed
while GetRawKeyPressed(27) <> 1 

    Print( ScreenFPS() )
    Sync()

endwhile

//Combo Input
//agk v2.0.14b
//MR 28.06.2015

global joystick
joystick=1

myCombo as string[64]

myCombo[0] = "Up,Down,Up,"
myCombo[1] = "A,A,A,"
myCombo[2] = "A,B,X,Y,"
myCombo[3] = "B,B,"
myCombo[4] = "X,X,X,"
myCombo[5] = "Y,A,B,"
myCombo[6] = "A,A,B,"

timeout=timer()
local sequence as string

type byRef
	value as string
endtype

local UpLast as byRef
local DownLast as byRef
UpLast.value=""
DownLast.value=""

do

	print(sequence)

	l1=len(sequence)

	sequence = sequence + InputA() + InputB() + InputX() + InputY() + InputUp(UpLast) + InputDown(DownLast)

	l2=len(sequence)
	
	if l2>l1 //before after check
		//it grow up
		timeout=timer()
	endif

	if timer()-timeout>0.75
		//grow up timeout, clear sequence
		timeout=timer()
		//.. maybe here check current value before clear ...
		sequence=""
	endif

	index=-1
	for c=0 to 6 //max. combos
		if sequence=myCombo[c]
			index=c //found sequence
			sequence="" //clear sequence
			exit
		endif
	next 
	
	if index=>0
		lastcombo$=myCombo[index]
	endif
	
	print("Last Combo: " + lastcombo$)
	
	if GetPointerPressed() then exit
	
	sync()

loop
end

function InputA()

	ret$=""
	if GetRawKeyPressed(65)=1 then ret$="A,"
	if GetRawJoystickButtonPressed(joystick,1) then ret$="A,"
	
endfunction ret$

function InputB()

	ret$=""
	if GetRawKeyPressed(66) then ret$="B,"
	if GetRawJoystickButtonPressed(joystick,2) then ret$="B,"
	
endfunction ret$

function InputX()

	ret$=""
	if GetRawKeyPressed(88) then ret$="X,"
	if GetRawJoystickButtonPressed(joystick,3) then ret$="X,"
	
endfunction ret$

function InputY()

	ret$=""
	if GetRawKeyPressed(89) then ret$="Y,"
	if GetRawJoystickButtonPressed(joystick,4) then ret$="Y,"
	
endfunction ret$

function InputUp(Last ref as byRef)

	ret$=""
	if GetRawKeyPressed(38) then ret$="Up,"
	if Last.value <> "Up," and GetRawJoystickY(joystick) < -0.25 
		ret$="Up," 
		Last.value=ret$
	endif
	if GetRawJoystickY(joystick) > -0.25 then Last.value=""
	
endfunction ret$

function InputDown(Last ref as byRef)

	ret$=""
	if GetRawKeyPressed(40) then ret$="Down,"
	if Last.value <> "Down," and GetRawJoystickY(joystick) > 0.25 
		ret$="Down,"
		Last.value=ret$
	endif
	if GetRawJoystickY(joystick) < 0.25 then Last.value=""
	
endfunction ret$

#constant    KEY_BACK         8
#constant    KEY_TAB          9
#constant    KEY_ENTER        13
#constant    KEY_SHIFT        16
#constant    KEY_CONTROL      17
#constant    KEY_ESCAPE       27
#constant    KEY_SPACE        32
#constant    KEY_PAGEUP       33
#constant    KEY_PAGEDOWN     34
#constant    KEY_END          35
#constant    KEY_HOME         36
#constant    KEY_LEFT         37
#constant    KEY_UP           38
#constant    KEY_RIGHT        39
#constant    KEY_DOWN         40
#constant    KEY_INSERT       45
#constant    KEY_DELETE       46
#constant    KEY_0            48
#constant    KEY_1            49
#constant    KEY_2            50
#constant    KEY_3            51
#constant    KEY_4            52
#constant    KEY_5            53
#constant    KEY_6            54
#constant    KEY_7            55
#constant    KEY_8            56
#constant    KEY_9            57
#constant    KEY_A            65
#constant    KEY_B            66
#constant    KEY_C            67
#constant    KEY_D            68
#constant    KEY_E            69
#constant    KEY_F            70
#constant    KEY_G            71
#constant    KEY_H            72
#constant    KEY_I            73
#constant    KEY_J            74
#constant    KEY_K            75
#constant    KEY_L            76
#constant    KEY_M            77
#constant    KEY_N            78
#constant    KEY_O            79
#constant    KEY_P            80
#constant    KEY_Q            81
#constant    KEY_R            82
#constant    KEY_S            83
#constant    KEY_T            84
#constant    KEY_U            85
#constant    KEY_V            86
#constant    KEY_W            87
#constant    KEY_X            88
#constant    KEY_Y            89
#constant    KEY_Z            90
#constant    KEY_F1           112
#constant    KEY_F2           113
#constant    KEY_F3           114
#constant    KEY_F4           115
#constant    KEY_F5           116
#constant    KEY_F6           117
#constant    KEY_F7           118
#constant    KEY_F8           119
#constant    KEY_S1           186    
#constant    KEY_S2           187
#constant    KEY_S3           188
#constant    KEY_S4           189
#constant    KEY_S5           190
#constant    KEY_S6           191
#constant    KEY_S7           192
#constant    KEY_S8           219
#constant    KEY_S9           220
#constant    KEY_S10          221
#constant    KEY_S11          222
#constant    KEY_S12          223