C# 调用SendMessage刷新任务栏图标(强制结束时图标未消失)

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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);
}
}
}