刷新通知区域中的图标(Windows CE)

时间:2017-05-30 14:47:31

标签: c# compact-framework windows-ce

网络搜索找到几篇文章,其中包含示例代码,显示如何在应用程序被终止时清除Windows托盘通知区域中遗留的杂散图标(例如,通过Task Manager或更新程序应用程序)。例如this CodeProject examplethis blog post

上述两个示例都使用了类似的技术,据报道可以在Windows XP,7,8.1和10上使用。

但是如何让他们使用.NET Compact Framework在Windows CE上工作?一个问题是FindWindowEx是必需的......但在coredll.dll中无法使用。

1 个答案:

答案 0 :(得分:1)

基于与问题相关的问题,我终于找到了一个有效的解决方案。我希望将来在Windows CE / Mobile上遇到类似的问题可以帮助其他人。

[DllImport("coredll.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

[DllImport("coredll.dll")]
public static extern IntPtr SendMessage(IntPtr hWnd, int nMsg, IntPtr wParam, IntPtr lParam);

private const int WM_MOUSEMOVE = 0x0200;

public static void RefreshTrayArea()
{
    // The client rectangle can be determined using "GetClientRect" (from coredll.dll) but
    // does require the taskbar to be visible. The values used in the loop below were
    // determined empirically.
    IntPtr hTrayWnd = FindWindow("HHTaskBar", null);
    if (hTrayWnd != IntPtr.Zero)
    {
        int nStartX = (Screen.PrimaryScreen.Bounds.Width / 2);
        int nStopX = Screen.PrimaryScreen.Bounds.Width;
        int nStartY = 0;
        int nStopY = 26;    // From experimentation...
        for (int nX = nStartX; nX < nStopX; nX += 10)
            for (int nY = nStartY; nY < nStopY; nY += 5)
                SendMessage(hTrayWnd,
                    WM_MOUSEMOVE, IntPtr.Zero, (IntPtr)((nY << 16) + nX));
    }
}