AutoHotkey Community

Run, notepad.exe
sleep 2000
WinGet, id, ID, Untitled - Notepad
FileAppend, hwnd: %id%`n, *
WinGet, t1, Transparent, ahk_id %id%
FileAppend, Initial transparency: %t1%`n, *
FileAppend, Setting transparency to 100...`n, *
WinSet, Transparent, 100, ahk_id %id%
WinGet, t2, Transparent, ahk_id %id%
FileAppend, Current Transparency: %t2%`n, *
FileAppend, Minimizing...`n, *
WinMinimize, ahk_id %id%
sleep 2000
WinGet, t3, Transparent, ahk_id %id%
FileAppend, Transparency while minimized: %t3%`n, *
FileAppend, Restoring...`n, *
WinRestore, ahk_id %id%
WinGet, t4, Transparent, ahk_id %id%
FileAppend, Current Transparency: %t4%`n, *

WinGet, xs, ExStyle, ahk_id %id%

if (xs & 0x00080000) ; 0x00080000 is WS_EX_LAYERED
{
  WinSet, ExStyle, -0x00080000, ahk_id %id%
  WinSet, ExStyle, +0x00080000, ahk_id %id%
}