#NoEnv ; Recommended for performance and compatibility with future AutoHotkey releases.
SendMode Input ; Recommended for new scripts due to its superior speed and reliability.

CustomColor = EEAA99    ; Can be any RGB color (it will be made transparent below).
Gui +LastFound +AlwaysOnTop -Caption +ToolWindow   ; +ToolWindow avoids a taskbar button and an alt-tab menu item.
Gui, Color, %CustomColor%
Gui, Font, s32  ; Set a large font size (32-point).
Gui, Add, Text, vMyText cLime, XXXXX YYYYY  ; XX & YY serve to auto-size the window.
; Make all pixels of this color transparent and make the text itself translucent (150):
WinSet, TransColor, %CustomColor% 150


SetTimer, UpdateOSD, 200
Gosub, UpdateOSD  ; Make the first update immediate rather than waiting for the timer.
Gui, Show, x0 y400 NoActivate  ; NoActivate avoids deactivating the currently active window.
return

UpdateOSD:
MouseGetPos, MouseX, MouseY
GuiControl,, MyText, X%MouseX%, Y%MouseY%
return