如何添加自定义项目到C ++中的系统菜单？ [英] How to add custom item to system menu in C++?

问题描述

我需要枚举所有正在运行的应用程序。特别是，所有的顶级窗口。

I need to enumerate all running applications. In particular, all top windows. And for every window I need to add my custom item to the system menu of that window.

如何在C ++中实现这一目标？

How can I accomplish that in C++?

更新。

我将非常乐意为Windows，MacOS和Ubuntu ，我不知道是否MacOS和Ubuntu有这样的东西作为系统菜单）。

I would be more than happy to have a solution for Windows, MacOS, and Ubuntu (though, I'm not sure if MacOS and Ubuntu have such thing as 'system menu').

推荐答案

获取顶级窗口（除了EnumWindows，它使用回调）是获取桌面的第一个孩子，然后检索所有的兄弟姐妹：

For Windows, another way to get the top-level windows (besides EnumWindows, which uses a callback) is to get the first child of the desktop and then retrieve all its siblings:

HWND wnd = GetWindow(GetDesktopWindow(), GW_CHILD);
while (wnd) {
    // handle 'wnd' here
    // ...
    wnd = GetNextWindow(wnd, GW_HWNDNEXT);
}

至于获取系统菜单， GetSystemMenu 函数，以FALSE作为第二个参数。 GetMenu

As for getting the system menu, use the GetSystemMenu function, with FALSE as the second argument. The GetMenu mentioned in the other answers returns the normal window menu.

请注意，虽然添加了自定义菜单项到外部进程的窗口很容易，响应选择的项目是有点棘手。你必须在进程中注入一些代码，以便能够子窗口，或者安装一个全局钩子（可能是一个 WH_GETMESSAGE 或 WH_CBT type）来监视 WM_SYSCOMMAND 消息。

Note, however, that while adding a custom menu item to a foreign process's window is easy, responding to the selection of that item is a bit tricky. You'll either have to inject some code to the process in order to be able to subclass the window, or install a global hook (probably a WH_GETMESSAGE or WH_CBT type) to monitor WM_SYSCOMMAND messages.

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