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我的意思是，例如，我现在正在观看 Visual Studio 窗口，然后单击 Chrome 图标的底部，现在我在 Chrome 窗口中。

我希望它检测到我现在所在的窗口已更改。如果我单击 chrome 图标或 Visual Studio 图标，则不会，而是以某种方式检测到我更改了我现在正在观看/活动/使用的窗口。

例如这段代码：

在我的 Form1 顶部，我添加了：

public delegate void ActiveWindowChangedHandler(object sender, String windowHeader, IntPtr hwnd);
        public event ActiveWindowChangedHandler ActiveWindowChanged;
        [DllImport("user32.dll")]
        static extern IntPtr GetForegroundWindow();
        [DllImport("user32.dll")]
        static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);

        delegate void WinEventDelegate(IntPtr hWinEventHook, uint eventType,
            IntPtr hwnd, int idObject, int idChild, uint dwEventThread,
            uint dwmsEventTime);

        const uint WINEVENT_OUTOFCONTEXT = 0;
        const uint EVENT_SYSTEM_FOREGROUND = 3;

        [DllImport("user32.dll")]
        static extern bool UnhookWinEvent(IntPtr hWinEventHook);

        [DllImport("user32.dll")]
        static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax,
            IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc,
            uint idProcess, uint idThread, uint dwFlags);

        IntPtr m_hhook;
        private WinEventDelegate _winEventProc;

然后在构造函数中：

_winEventProc = new WinEventDelegate(WinEventProc);
            m_hhook = SetWinEventHook(EVENT_SYSTEM_FOREGROUND,
                EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, _winEventProc,
                0, 0, WINEVENT_OUTOFCONTEXT);

然后添加事件和功能：

void WinEventProc(IntPtr hWinEventHook, uint eventType, IntPtr hwnd,
            int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
       {
            if (eventType == EVENT_SYSTEM_FOREGROUND)
            {
               if (ActiveWindowChanged != null)
                  ActiveWindowChanged(this,GetActiveWindowTitle(hwnd),hwnd);
            }
       }

       private string GetActiveWindowTitle(IntPtr hwnd)
       {
          StringBuilder Buff = new StringBuilder(500);
          GetWindowText(hwnd, Buff, Buff.Capacity);
          return Buff.ToString();
       }

       ~Form1()
       { 
        UnhookWinEvent(m_hhook);
       }

但我不确定如何让它工作以及如何使用它以及它是否是正确的代码。

你能告诉我一个如何做的代码示例吗？

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1 回答 1

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是的，您可以使用 SetWinEventHook 函数。

hEvent = SetWinEventHook(EVENT_SYSTEM_FOREGROUND , 
    EVENT_SYSTEM_FOREGROUND , NULL, 
    WinEventProcCallback, 0, 0, 
    WINEVENT_OUTOFCONTEXT | WINEVENT_SKIPOWNPROCESS);

.......

VOID CALLBACK WinEventProcCallback ( HWINEVENTHOOK hWinEventHook, DWORD dwEvent, HWND hwnd, LONG idObject, LONG idChild, DWORD dwEventThread, DWORD dwmsEventTime)
{
    /* your code here */
}

从这里引用 DReJ 。

于 2013-05-29T22:15:51.310 回答