在C#中向windows窗体发送消息示例

最新推荐文章于 2022-08-30 22:39:39 发布

转载最新推荐文章于 2022-08-30 22:39:39 发布 · 833 阅读

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#c#

本文提供了一个使用C#模拟鼠标点击的示例代码。通过调用User32.dll中的FindWindow和FindWindowEx函数定位目标窗口及按钮，再利用SendMessage函数发送鼠标左键按下与释放的消息来实现模拟点击操作。

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// define
[DllImport("User32.dll")]
public static extern IntPtr FindWindow(String lpClassName, String lpWindowName);

[DllImport("User32.dll")]
static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);

        const int WM_LBUTTONDOWN = 0x201;
        const int WM_LBUTTONUP = 0x0202;

  // sample, u should use spy++ to find windows class name and control class name

        IntPtr hwndWin = FindWindow("TfrmMain", "window title");
            if (hwndWin.Equals(IntPtr.Zero) == false)
            {
                IntPtr hwndBtn = FindWindowEx(hwndWin, IntPtr.Zero, "TButton", "control text");
                if (hwndBtn.Equals(IntPtr.Zero) == false)
                {
                    SendMessage(hwndBtn, WM_LBUTTONDOWN, IntPtr.Zero, IntPtr.Zero);
                    SendMessage(hwndBtn, WM_LBUTTONUP, IntPtr.Zero, IntPtr.Zero);
                }
            }