Simple Pause Game

This code has been declared by its author to be Public Domain code.

Simple Pause Game by _PJ_

2010

Using the User32.dll library, GetKeyState(), the Pause/Break key acts like a switch. the switch can then be checked repetitiously in a loop for changes.

The only complication, is that the Pause/Break key 'switch' may already be turned ON prior to running the program, or as a result of exiting a 'paused' game.

This entails an initial setting to reflect the state of the key, and store it as adefault non-paused value.

The code requires a .decls file with the following declaration:

.Lib "user32.dll"
GetKeyState% (nVirtKey%) : "GetKeyState"

Place these lines into a text file, and save it as "user32.decls" in the userlibs folder.

;INITIALISATION
Global b_gam_PAUSESTATE_PAUSED=(Not(GetKeyState(19)))

; FUNCTIONS
Function b_cnt_Paused() ;Allows Pause/Break key to toggle Pause mode and returns True if Paused.
	; Ensure v_cnt_InitialisePause() is called at program initialisation if you use this function!
	Return (GetKeyState(19)=b_gam_PAUSESTATE_PAUSED)	;$13 = VK_PAUSE
End Function

; EXAMPLE:
While Not KeyDown(1)
	Cls
	FlushKeys()
	If (b_cnt_Paused())
		Text 0,0,("Game is paused")
		Else Text 0,0, ("Game is not paused")
	End If
	Flip
Wend

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