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

         [DllImport("user32.dll", EntryPoint = "FindWindow")]
         private static extern int FindWindow(string lpszClass, string lpszWindow);
         [DllImport("user32.dll", EntryPoint = "FindWindowEx")]
         private static extern int FindWindowEx(int hwndParent, int hwndChildAfter, string lpszClass, string lpszWindow);

         [DllImport("user32.dll", EntryPoint = "GetWindowRect")]
         private static extern int GetWindowRect(int hwnd, ref System.Drawing.Rectangle lpRect);
         [DllImport("user32.dll", EntryPoint = "SendMessage")]
         private static extern int SendMessage(int hwnd, int wMsg, int wParam, int lParam);

         private static readonly int WM_MOUSEMOVE = ;

winapi

封装调用的流程方法

         /// <summary>
         /// 刷新任务栏图标
         /// </summary>
         public static void RefreshTaskbarIcon()
         {
             //任务栏窗口
             int one = FindWindow("Shell_TrayWnd", null);
             //任务栏右边托盘图标+时间区
             int two = FindWindowEx(one, , "TrayNotifyWnd", null);
             //不同系统可能有可能没有这层
             int three = FindWindowEx(two, , "SysPager", null);
             //托盘图标窗口
             int foor;
             if (three > )
             {
                 foor = FindWindowEx(three, , "ToolbarWindow32", null);
             }
             else
             {
                 foor = FindWindowEx(two, , "ToolbarWindow32", null);
             }
             if (foor > )
             {
                 System.Drawing.Rectangle r = new System.Drawing.Rectangle();
                 GetWindowRect(foor, ref r);
                 //从任务栏左上角从左到右 MOUSEMOVE一遍，所有图标状态会被更新
                 for (int x = ; x < (r.Right - r.Left) - r.X; x++)
                 {
                     SendMessage(foor, WM_MOUSEMOVE, , ( << ) | x);
                 }
             }
         }

方法