''' <summary>
''' Finds the bookmark.
''' </summary>
''' <param name="document">The document.</param>
''' <param name="bookmarkTitle">The title of bookmark.</param>
Public Function FindBookmark(document As Vintasoft.Imaging.Pdf.PdfDocument, bookmarkTitle As String) As Vintasoft.Imaging.Pdf.Tree.PdfBookmark
    Return FindBookmark(document.Bookmarks, bookmarkTitle)
End Function

''' <summary>
''' Finds the bookmark.
''' </summary>
''' <param name="bookmarks">The bookmarks.</param>
''' <param name="bookmarkTitle">The title of bookmark.</param>
Private Function FindBookmark(bookmarks As Vintasoft.Imaging.Pdf.Tree.PdfBookmarkCollection, bookmarkTitle As String) As Vintasoft.Imaging.Pdf.Tree.PdfBookmark
    If bookmarks Is Nothing Then
        Return Nothing
    End If

    For i As Integer = 0 To bookmarks.Count - 1
        If bookmarks(i).Title = bookmarkTitle Then
            Return bookmarks(i)
        End If

        Dim result As Vintasoft.Imaging.Pdf.Tree.PdfBookmark = FindBookmark(bookmarks(i).ChildBookmarks, bookmarkTitle)
        If result IsNot Nothing Then
            Return result
        End If
    Next

    Return Nothing
End Function

/// <summary>
/// Finds the bookmark.
/// </summary>
/// <param name="document">The document.</param>
/// <param name="bookmarkTitle">The title of bookmark.</param>
public Vintasoft.Imaging.Pdf.Tree.PdfBookmark FindBookmark(
    Vintasoft.Imaging.Pdf.PdfDocument document, string bookmarkTitle)
{
    return FindBookmark(document.Bookmarks, bookmarkTitle);
}

/// <summary>
/// Finds the bookmark.
/// </summary>
/// <param name="bookmarks">The bookmarks.</param>
/// <param name="bookmarkTitle">The title of bookmark.</param>
private Vintasoft.Imaging.Pdf.Tree.PdfBookmark FindBookmark(
    Vintasoft.Imaging.Pdf.Tree.PdfBookmarkCollection bookmarks, string bookmarkTitle)
{
    if (bookmarks == null)
        return null;

    for (int i = 0; i < bookmarks.Count; i++)
    {
        if (bookmarks[i].Title == bookmarkTitle)
            return bookmarks[i];

        Vintasoft.Imaging.Pdf.Tree.PdfBookmark result = 
            FindBookmark(bookmarks[i].ChildBookmarks, bookmarkTitle);
        if (result != null)
            return result;
    }

    return null;
}