#include <WinAPIError.au3>

MsgBox (1, "You Are Running " & @OSVersion & "   Build " & @OSBuild, "The Firmware Type Is " & GetFirmwareType ())

Func GetFirmwareType ()
	$gftreturn = "UEFI"
	Select
		Case @OSBuild > 20000   ; Windows 11
		Case @OSBuild >  9000   ; Windows 10 or 8
			$gftarray = DllCall ("Kernel32.dll", "int", "GetFirmwareType", "int*", 0)
			If @error Or Ubound ($gftarray) < 2 Then Return "ERROR"
			If $gftarray [1] <> 2 Then $gftreturn = "BIOS"
		Case @OSBuild >  6000   ; Windows 7 or Vista
			DllCall ("kernel32.dll", "int", "GetFirmwareEnvironmentVariableA", "str", "",   "str", _
	                                 "{00000000-0000-0000-0000-000000000000}", "ptr", Null, "dword", 0)
			$gftcode    = _WinAPI_GetLastError ()
			If $gftcode = 1 Then $gftreturn = "BIOS"
		Case Else				; XP
			$gftreturn = "BIOS"
	EndSelect
	Return $gftreturn
EndFunc