a:=PicWaitAndClick("pic1.png")
MsgBox, % a
ExitApp

PicWaitAndClick(picture, click:=1,dx := 0,dy := 0, PreClickDelay := 0,break_index := 1,Loop_Sleep := 20)
{
	Loop
	{
		ImageSearch, x, y, 0, 0,% A_ScreenWidth,% A_ScreenHeight, % picture
		if errorlevel=0
			break
		if a_index=%break_index%
			return 0
		sleep % Loop_Sleep
	}
		if PreClickDelay!=0
			Sleep % PreClickDelay
		if click=1
			MouseClick,left,% x+dx,% y+dy
		else
			MouseMove, % x+dx,% y+dy
		return 1
}

#Include C:\Program Files\AutoHotkey\lib\Gdip.ahk

IniRead,indx,scrn_indx.ini,indx,indx,0
indx++

CoordMode,mouse,screen
If !pToken := Gdip_Startup()
{
	MsgBox, 48, gdiplus error!, Gdiplus failed to start. Please ensure you have gdiplus on your system
	ExitApp
}
w:=A_ScreenWidth
h:=A_ScreenHeight
pBrush:=Gdip_BrushCreateSolid("0x220000ff")
Gui, 1: -Caption +E0x80000 +LastFound +AlwaysOnTop +ToolWindow +OwnDialogs
Gui, 1: Show, NA
hwnd1 := WinExist()
hbm := CreateDIBSection(w, h)
hdc := CreateCompatibleDC()
obm := SelectObject(hdc, hbm)
G := Gdip_GraphicsFromHDC(hdc)
Gdip_SetSmoothingMode(G, 5)

pBitmap:=Gdip_BitmapFromScreen()
Gdip_DrawImage(G, pBitmap, 0, 0, w, h, 0, 0, w, h)
UpdateLayeredWindow(hwnd1, hdc, 0, 0, w, h)

Hotkey,LButton,return
KeyWait,LButton,d

MouseGetPos,M1X,M1Y
while GetKeyState("LButton","P")
{
MouseGetPos,M2X,M2Y
Gdip_DrawImage(G, pBitmap, 0, 0, w, h, 0, 0, w, h)
Gdip_FillRectangle(G, pBrush, min(M1X,M2X), min(M1Y,M2Y),	abs(M2X-M1X), abs(M2Y-M1Y))
UpdateLayeredWindow(hwnd1, hdc, 0, 0, w, h)
}
Gdip_DrawImage(G, pBitmap, 0, 0, w, h, 0, 0, w, h)
UpdateLayeredWindow(hwnd1, hdc, 0, 0, w, h)
pBitmap:=Gdip_BitmapFromScreen(min(M1X,M2X) "|" min(M1Y,M2Y) "|" abs(M2X-M1X) "|" abs(M2Y-M1Y) )
Gdip_SaveBitmapToFile(pBitmap, A_ScriptDir "\my_pic_" indx ".png", 100)

IniWrite,%indx%,scrn_indx.ini,indx,indx
 
ToolTip Done
sleep 100
Reload

max(a,b)
{
if a>%b%
	return a
return b
}

min(a,b)
{
if a<%b%
	return a
return b
}

return:
return
Esc::
Exit:
Gdip_Shutdown(pToken)
ExitApp