如何检测我的应用程序最小化？ [英] How could I detect when my application is minimized?

问题描述

我有一个程序具有启用最小化任务栏的通知区域的选项。为了这个工作，我需要一个可靠的方法来检测用户何时最小化应用程序。

I have a program with an option to enable minimizing to the taskbar's notification area. In order for this to work, I need a reliable way of detecting when the user has minimized the application.

如何在C ++应用程序中使用Windows API

How can I do that using the Windows API in a C++ application?

推荐答案

当用户最小化窗口时（使用标题栏上的框或通过选择最小化从系统菜单），您的应用程序将收到 WM_SYSCOMMAND 消息。该消息的 wParam 参数将包含值 SC_MINIMIZE ，其指示正在请求的系统命令的特定类型。在这种情况下，你不关心 lParam 。

When the user minimizes the window (either using the box on the title bar, or by selecting the "Minimize" option from the system menu), your application will receive a WM_SYSCOMMAND message. The wParam parameter of that message will contain the value SC_MINIMIZE, which indicates the particular type of system command that is being requested. In this case, you don't care about the lParam.

所以你需要设置一个消息映射侦听 WM_SYSCOMMAND 消息，并将 wParam 设置为 SC_MINIMIZE 。收到此类邮件后，您应该执行代码以最小化对任务栏通知区域的应用，并返回0（表示您已处理邮件）。

So you need to set up a message map that listens for a WM_SYSCOMMAND message with the wParam set to SC_MINIMIZE. Upon receipt of such a message, you should execute your code to minimize your application to the taskbar notification area, and return 0 (indicating that you've processed the message).

我不知道你使用的是什么GUI框架。示例代码对于不同的工具包可能看起来非常不同。这里是你可能在一个直接的Win32 C应用程序中使用：

I'm not sure what GUI framework you're using. The sample code could potentially look very different for different toolkits. Here's what you might use in a straight Win32 C application:

switch (message)
{
case WM_SYSCOMMAND:
    if ((wParam & 0xFFF0) == SC_MINIMIZE)
    {
        // shrink the application to the notification area
        // ...

        return 0;
    }
    break;
}

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