检测应用程序是否固定在任务栏上

您可以通过检查%appdata%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar存储所有固定应用程序快捷方式的文件夹，来检测当前用户是否将应用程序固定到任务栏。例如（需要添加对Windows脚本宿主对象模型的COM引用）：

private static bool IsCurrentApplicationPinned() {
    // path to current executable
    var currentPath = Assembly.GetEntryAssembly().Location;            
    // folder with shortcuts
    string location = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar");
    if (!Directory.Exists(location))
        return false;

    foreach (var file in Directory.GetFiles(location, "*.lnk")) {
        IWshShell shell = new WshShell();
        var lnk = shell.CreateShortcut(file) as IWshShortcut;
        if (lnk != null) {  
            // if there is shortcut pointing to current executable - it's pinned                                    
            if (String.Equals(lnk.TargetPath, currentPath, StringComparison.InvariantCultureIgnoreCase)) {
                return true;
            }
        }
    }
    return false;
}

还有一种方法可以检测是否从固定的项目启动了应用程序。为此，您将需要GetStartupInfowin api函数。除其他信息外，它将为您提供开始当前进程的快捷方式（或仅文件）的完整路径。例：

[DllImport("kernel32.dll", SetLastError = true, EntryPoint = "GetStartupInfoA")]
public static extern void GetStartupInfo(out STARTUPINFO lpStartupInfo);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct STARTUPINFO
{
    public uint cb;
    public string lpReserved;
    public string lpDesktop;
    public string lpTitle;
    public uint dwX;
    public uint dwY;
    public uint dwXSize;
    public uint dwYSize;
    public uint dwXCountChars;
    public uint dwYCountChars;
    public uint dwFillAttribute;
    public uint dwFlags;
    public ushort wShowWindow;
    public ushort cbReserved2;
    public IntPtr lpReserved2;
    public IntPtr hStdInput;
    public IntPtr hStdOutput;
    public IntPtr hStdError;
}

用法：

STARTUPINFO startInfo;
GetStartupInfo(out startInfo);
var startupPath = startInfo.lpTitle;

现在，如果您已经从任务栏启动了应用程序，startupPath它将指向的快捷方式%appdata%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar，因此使用所有这些信息，很容易检查应用程序是否从任务栏启动。