c# - 钩子检测最小化窗口 C#

Question

大家好 我如何在 C# 中检测到用户单击了外部程序（例如记事本）的最小化按钮？谢谢

Answer 1

这应该有效：

    public class myClass
    {
    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);

    const UInt32 SW_HIDE =         0;
    const UInt32 SW_SHOWNORMAL =       1;
    const UInt32 SW_NORMAL =       1;
    const UInt32 SW_SHOWMINIMIZED =    2;
    const UInt32 SW_SHOWMAXIMIZED =    3;
    const UInt32 SW_MAXIMIZE =     3;
    const UInt32 SW_SHOWNOACTIVATE =   4;
    const UInt32 SW_SHOW =         5;
    const UInt32 SW_MINIMIZE =     6;
    const UInt32 SW_SHOWMINNOACTIVE =  7;
    const UInt32 SW_SHOWNA =       8;
    const UInt32 SW_RESTORE =      9;

    public myClass()
    {
        var proc = Process.GetProcessesByName("notepad");
        if (proc.Length > 0)
        {
            bool isNotepadMinimized = myClass.GetMinimized(proc[0].MainWindowHandle);

            if (isNotepadMinimized)
                Console.WriteLine("Notepad is Minimized!");
        }
    }

    private struct WINDOWPLACEMENT
    {
        public int length;
        public int flags;
        public int showCmd;
        public System.Drawing.Point ptMinPosition;
        public System.Drawing.Point ptMaxPosition;
        public System.Drawing.Rectangle rcNormalPosition;
    }

    public static bool GetMinimized(IntPtr handle)
    {
        WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
        placement.length = Marshal.SizeOf(placement);
        GetWindowPlacement(handle, ref placement);
        return placement.flags == SW_SHOWMINIMIZED;
    }
}

编辑：只需重新阅读您的问题，并注意到您希望在记事本最小化时收到通知。好吧，您可以在计时器中使用上面的代码来轮询状态更改。

Answer 2

正如 Hans Passant 所说，您无法将其最小化。

虽然，我相信您可以存储窗口的状态并查看它们是否在以后的时间间隔内最小化。通过使用GetWindowPlacement 函数。

Answer 3

上面的答案有错误。

你需要检查placement.showCMD，而不是placement.flags

WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
placement.length = Marshal.SizeOf(placement);
GetWindowPlacement(_hwnd, ref placement);
return placement.showCmd == SW_SHOWMINIMIZED;

请参阅https://msdn.microsoft.com/en-us/library/windows/desktop/ms632611(v=vs.85).aspx