http://www.autohotke...pic.php?t=86414
Two Similar Texts (with transparent background) can be overlapped (superimposed)
one over the another (with a slight offset) to create an effect of shadowed text.
These texts have to be colored in contrast with each other.
The following example code displays a "Shadowed Text" in a GUI
Text= Shadowed Gui, -Caption Gui, Color, 5E43FF Gui,Font, s36 Bold, Verdana Gui, Add,Text,x4 y4 w384 h80 Center vText1 c000000 BackgroundTrans, % Text Gui, Add,Text,x0 y0 w384 h80 Center vText2 cFFFFFF BackgroundTrans, % Text Gui,Show,w400 h80 Return GuiClose: GuiEscape: ExitApp Return
The result of the above code:

Seen in the above snapshot - The White colored text is vertically and
horizontally offset from the Black colored text by 4 pixels.
This might be a good technique for large sized texts only.
I use this technique when scripting an Installer with AHK.
Compare these 2 snapshots taken from a working demo.

Want to try the Demo? You may download it : ST_Demo.ahk
How to Display OSD with Shadowed Text : Example code is here