C# 调用SendMessage刷新任务栏图标(强制结束时图标未消失)

本文参考C++改写 https://blog.csdn.net/dpsying/article/details/20139651  (该文章的坐标理解的有误解,会导致功能无效)

SendMessage的移动鼠标里的坐标 是基于句柄内的 坐标，并不是屏幕坐标，任务栏宽度300 高度固定40，那么就应该从宽度0-300 坐标15之间 移动过去。

首先声明需要用到的 winapi 函数

 1   [DllImport("user32.dll", EntryPoint = "FindWindow")] 2   private static extern int FindWindow(string lpszClass, string lpszWindow); 3   [DllImport("user32.dll", EntryPoint = "FindWindowEx")] 4   private static extern int FindWindowEx(int hwndParent, int hwndChildAfter, string lpszClass, string lpszWindow); 5  6   [DllImport("user32.dll", EntryPoint = "GetWindowRect")] 7   private static extern int GetWindowRect(int hwnd, ref System.Drawing.Rectangle lpRect); 8   [DllImport("user32.dll", EntryPoint = "SendMessage")] 9   private static extern int SendMessage(int hwnd, int wMsg, int wParam, int lParam);10 11   private static readonly int WM_MOUSEMOVE = 512;

winapi

封装调用的流程方法

 1   /// <summary> 2   /// 刷新任务栏图标 3   /// </summary> 4   public static void RefreshTaskbarIcon() 5   { 6    //任务栏窗口 7    int one = FindWindow("Shell_TrayWnd", null); 8    //任务栏右边托盘图标+时间区 9    int two = FindWindowEx(one, 0, "TrayNotifyWnd", null);10    //不同系统可能有可能没有这层11    int three = FindWindowEx(two, 0, "SysPager", null);12    //托盘图标窗口13    int foor;14    if (three > 0)15    {16     foor = FindWindowEx(three, 0, "ToolbarWindow32", null);17    }18    else19    {20     foor = FindWindowEx(two, 0, "ToolbarWindow32", null);21    }22    if (foor > 0)23    {24     System.Drawing.Rectangle r = new System.Drawing.Rectangle();25     GetWindowRect(foor, ref r);26     //从任务栏左上角从左到右 MOUSEMOVE一遍，所有图标状态会被更新27     for (int x = 0; x < (r.Right - r.Left) - r.X; x++)28     {29      SendMessage(foor, WM_MOUSEMOVE, 0, (1 << 16) | x);30     }31    }32   }

方法

 

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