.NET 1.1 で COM ポイントに接続

private struct WindowData {
    public System.Windows.Forms.HtmlDocument document;
    public IConnectionPoint icpWin;
    public int cookieWin;
    public IConnectionPoint icpDoc;
    public int cookieDoc;
}

private WindowData setWindowComConnect(object pDisp){
    WindowData data = new WindowData();
    // UCOM Connect
    Guid guid;
    data.document = (HTMLDocument)((SHDocVw.IWebBrowser2)pDisp).Document;
    // Document
    IConnectionPointContainer pConPtCon = (IConnectionPointContainer)data.document;
    guid = typeof(HTMLDocumentEvents2).GUID;
    pConPtCon.FindConnectionPoint(ref guid, out data.icpDoc);
    data.icpDoc.Advise(this, out data.cookieDoc);
    // Window
    IConnectionPointContainer pCpcWin = (IConnectionPointContainer)data.document.parentWindow;
    guid = typeof(HTMLWindowEvents2).GUID;
    pCpcWin.FindConnectionPoint(ref guid, out data.icpWin);
    data.icpWin.Advise(this, out data.cookieWin);
    return data;
    }
    private void unsetWindowComConnect(WindowData data){
    if (data.icpWin != null) {
    try {
    data.icpWin.Unadvise(data.cookieWin);
    Marshal.ReleaseComObject(data.icpWin);
    } catch (Exception ex) {
    }
    }
    if (data.icpDoc != null) {
        data.icpDoc.Unadvise(data.cookieDoc);
        Marshal.ReleaseComObject(data.icpDoc);
    }
    if (data.document != null) {
        Marshal.ReleaseComObject(data.document);
    }
}