Windows 7 - Taskbar - Pin or Unpin Program Links

Question

As in title, is there any Win32 API to do that?

Answer 1

It works, but not for all OS, e.g. Windows 10:

    [DllImport("kernel32.dll")]
    private static extern IntPtr LoadLibrary(string dllName);
    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    static extern int LoadString(IntPtr hInstance, uint uID, StringBuilder lpBuffer, int nBufferMax);

    private static void PinUnpinTaskBar(string filePath, bool pin)
    {
        if (!File.Exists(filePath))
            throw new FileNotFoundException(filePath + " not exists!");

        int MAX_PATH = 255;
        var actionIndex = pin ? 5386 : 5387; // 5386 is the DLL index for"Pin to Tas&kbar", ref. http://www.win7dll.info/shell32_dll.html
        StringBuilder szPinToStartLocalized = new StringBuilder(MAX_PATH);
        IntPtr hShell32 = LoadLibrary("Shell32.dll");
        LoadString(hShell32, (uint)actionIndex, szPinToStartLocalized, MAX_PATH);
        string localizedVerb = szPinToStartLocalized.ToString();

        // create the shell application object
        dynamic shellApplication = Activator.CreateInstance(Type.GetTypeFromProgID("Shell.Application"));

        string path = Path.GetDirectoryName(filePath);
        string fileName = Path.GetFileName(filePath);

        dynamic directory = shellApplication.NameSpace(path);
        dynamic link = directory.ParseName(fileName);

        dynamic verbs = link.Verbs();
        for (int i = 0; i < verbs.Count(); i++)
        {
            dynamic verb = verbs.Item(i);

            if ((pin && verb.Name.Equals(localizedVerb)) || (!pin && verb.Name.Contains(localizedVerb)))
            {
                verb.DoIt();
                break;
            }
        }
    }