SetTitleMatchMode, 2
GroupAdd, Gui_Blank, ahk_class AutoHotkeyGUI
GroupAdd, Gui_Blank, BlankScr.ahk

!^9::
count++
global m := mod(count,2)
mvmouse(m)
return

^F12::
Run, C:\Users\Suhas\Desktop\BlankScr.ahk
SystemCursor("Off")
mbak := m
SoundBeep
WinWaitActive, ahk_group Gui_Blank
mvmouse(1)
SoundBeep
WinWaitNotActive, ahk_group Gui_Blank
SoundBeep
mvmouse(mbak)
SystemCursor("On")
return

SystemCursor(OnOff=1)   ; INIT = "I","Init"; OFF = 0,"Off"; TOGGLE = -1,"T","Toggle"; ON = others
{
    static AndMask, XorMask, $, h_cursor
        ,c0,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13 ; system cursors
        , b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13   ; blank cursors
        , h1,h2,h3,h4,h5,h6,h7,h8,h9,h10,h11,h12,h13   ; handles of default cursors
    if (OnOff = "Init" or OnOff = "I" or $ = "")       ; init when requested or at first call
    {
        $ := "h"                                       ; active default cursors
        VarSetCapacity( h_cursor,4444, 1 )
        VarSetCapacity( AndMask, 32*4, 0xFF )
        VarSetCapacity( XorMask, 32*4, 0 )
        system_cursors := "32512,32513,32514,32515,32516,32642,32643,32644,32645,32646,32648,32649,32650"
        StringSplit c, system_cursors, `,
        Loop %c0%
        {
            h_cursor   := DllCall( "LoadCursor", "Ptr",0, "Ptr",c%A_Index% )
            h%A_Index% := DllCall( "CopyImage", "Ptr",h_cursor, "UInt",2, "Int",0, "Int",0, "UInt",0 )
            b%A_Index% := DllCall( "CreateCursor", "Ptr",0, "Int",0, "Int",0
                , "Int",32, "Int",32, "Ptr",&AndMask, "Ptr",&XorMask )
        }
    }
    if (OnOff = 0 or OnOff = "Off" or $ = "h" and (OnOff < 0 or OnOff = "Toggle" or OnOff = "T"))
        $ := "b"  ; use blank cursors
    else
        $ := "h"  ; use the saved cursors

    Loop %c0%
    {
        h_cursor := DllCall( "CopyImage", "Ptr",%$%%A_Index%, "UInt",2, "Int",0, "Int",0, "UInt",0 )
        DllCall( "SetSystemCursor", "Ptr",h_cursor, "UInt",c%A_Index% )
    }
}

mvmouse(val)
{
	valm := mod(val, 2)
	if(valm = 1)
	{
	SetTimer, MoveMouse,
	MoveMouse:
	If ( A_TimeIdle > 59000 )
	{
		MouseMove, 1, 0,, R
		MouseMove, -1, 0,, R
	}
	return
	}
	Return
}


C:\Users\Suhas\Desktop\BlankScr.ahk is a separate script whose contents are pasted below.


Gui, Color, black
Gui +AlwaysOnTop
Gui -Caption
Gui, Show, x0 y0 w%A_ScreenWidth% h%A_ScreenHeight%
return
esc::exitapp