如何禁用Alt键的正常行为？ [英] How to disable normal behaviour of Alt key?

问题描述

通常Alt键打开的菜单在Windows中。

Normally the Alt key opens the menu in Windows.

我需要这个被禁用，因为我需要为我的应用程序Alt键。 （这是旧电脑的模拟器，所以我要模仿它的行为。）我把它写在纯粹的Windows API，所以我希望，必须有一些消息被发送，需要被禁止，丢弃或忽略。

I need this to be disabled, because I need Alt key for my application. (It is an emulator of old computer, so I need to mimic its behaviour.) I write it in pure Windows API, so I expect there must be some message which is sent and needs to be disabled, discarded or ignored.

Alt + Tab是没有问题的，以及其他系统键和组合键，我只需要当它打开的菜单忽略Alt键。

Alt+Tab is no problem, as well as other system keys and key combinations, I just need to ignore Alt when it opens the menu.

（我的应用程序使用DirectInput的读取钥匙，所以效果很好。我只需要禁用它打开与Alt键菜单的功能。我会用鼠标打开菜单。）

(My application uses DirectInput to read the keys, so it works well. I just need to disable the functionality which opens the menu with Alt key. I will open the menu using mouse.)

推荐答案

如何检查 WM_SYSCOMMAND ，当wParam为 SC_KEYMENU ，返回0？

How about checking for WM_SYSCOMMAND, and when wParam is SC_KEYMENU, return 0?

更新/精确解：

if(wParam==SC_KEYMENU && (lParam>>16)<=0) return 0;
return DefWindowProc(hwnd, message, wParam, lParam);

描述：如果 lParam的＆GT;＆GT; 16 是正的，那么菜单被鼠标激活，当它是零或负数，菜单由Alt键或Alt +东西激活。

Description: If lParam>>16 is positive then menu is activated by mouse, when it is zero or negative then menu is activated by Alt or Alt+something.

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