如何将 AltGr 键全局映射到 Alt 键？

I want my AltGr key to behave exactly like left Alt.
Usually, I do this kind of stuff with Autohotkey http://www.autohotkey.com/, but I'm open to different solutions.

我试过这个：

LControl & RAlt::Alt

并且 Autohotkey 显示有关的错误Alt不被认可的行动。
然后我尝试了以下代码：

LControl & RAlt::
  Send {Alt down}
  KeyWait LCtrl
  KeyWait Ralt
  Send {Alt up}
return

which sort of works - I'm able to use the AltGr key for accessing hotkeys, but it still behaves differently:
When I press and release the left Alt, the first menu item in the current program receives focus.
Pressing and releasing AltGr with this script does nothing.

Any ideas? Is this even possible with Autohotkey? (remapping right Ctrl and Shift to their left siblings was piece of cake)

Thank you all for answers. I was unable to solve this using AutoHotkey -- PhilLho's answer was close, but I really needed exatly the same behaviour as with left Alt key.

但是，那注册表的东西 https://stackoverflow.com/questions/229633/how-to-globally-map-altgr-key-to-alt-key#396859实际上按照我的需要工作了。

将此另存为AltGR_to_LeftAlt.reg文件并运行它：

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout]
"Scancode Map"=hex:00,00,00,00,00,00,00,00,02,00,00,00,38,00,38,e0,00,00,00,00

Or, there is a GUI tool that does this for you -- it's called SharpKeys https://github.com/randyrants/sharpkeys and works peachy:

哦，别忘了重新启动或注销——直到那时它才起作用！