/// <summary>
        /// Load pdf file
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        private bool LoadFile(string fileName)
        {
            bool isrmsProtect = true;

            byte[] license = null;

            try
            {
                //RMS化PDFファイルから、RMSライセンス情報と、暗号化された本文情報を分割する
                //RMS署名情報から、RMSサーバー情報を抽出する
                //RMSサーバーでの認証
                //RMSサーバーからRMSライセンスの取得
                license = SafeFileApiNativeMethods.IpcfGetSerializedLicenseFromFile(fileName);
            }
            catch (Exception ex)
            {
                isrmsProtect = false;
            }

            if (isrmsProtect)
            {
                try
                {
                    //SymmetricKeyCredential symmkey = new SymmetricKeyCredential();
                    //symmkey.AppPrincipalId = "0C5BDABD-CF4D-4FBB-BF4A-DD62BCF7E976";
                    //symmkey.Base64Key = "P@ssw0rd";
                    //symmkey.BposTenantId = "*****@*****.**";

                    SymmetricKeyCredential symmkey = null;

                    //RMSライセンスから、復号鍵の抽出
                    SafeInformationProtectionKeyHandle keyHandle = SafeNativeMethods.IpcGetKey(license, false, false, true, this);
                    //symmkey = (SymmetricKeyCredential)keyHandle;

                    //RMSライセンスから、権利リストの抽出
                    //Collection<UserRights> userRights = new Collection<UserRights>();
                    //userRights = SafeNativeMethods.IpcGetSerializedLicenseUserRightsList(license, keyHandle);

                    bool accessGranted = SafeNativeMethods.IpcAccessCheck(keyHandle, "VIEW");

                    if (accessGranted)
                    {
                        SafeFileApiNativeMethods.IpcfDecryptFile(fileName,
                                                                 SafeFileApiNativeMethods.DecryptFlags.IPCF_DF_FLAG_DEFAULT,
                                                                 false,
                                                                 false,
                                                                 true,
                                                                 this,
                                                                 symmkey);
                    }

                    //使用権限が正しく設定されていません
                    //ConnectionInfo connectionInfo = SafeNativeMethods.IpcGetSerializedLicenseConnectionInfo(license);
                    //System.Collections.ObjectModel.Collection<TemplateIssuer> templateIssuerList = SafeNativeMethods.IpcGetTemplateIssuerList(connectionInfo, false, false, false, false, this, symmkey);
                    //TemplateIssuer templateIssuer = templateIssuerList[0];
                    //SafeInformationProtectionLicenseHandle licenseHandle = SafeNativeMethods.IpcCreateLicenseFromScratch(templateIssuer);
                    //SafeFileApiNativeMethods.IpcfEncryptFile(fileName, licenseHandle, SafeFileApiNativeMethods.EncryptFlags.IPCF_EF_FLAG_DEFAULT, false, false, false, this, symmkey);

                    //テンプレートは管理者によって作成されていません
                    //TemplateInfo templateInfo = SafeNativeMethods.IpcGetSerializedLicenseDescriptor(license, keyHandle, System.Globalization.CultureInfo.CurrentCulture);
                    //SafeFileApiNativeMethods.IpcfEncryptFile(fileName, templateInfo.TemplateId, SafeFileApiNativeMethods.EncryptFlags.IPCF_EF_FLAG_DEFAULT, false, false, true, this, null);
                }
                catch (InformationProtectionException ex)
                {
                    isrmsProtect = false;
                    MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK);
                }
                catch (Exception ex)
                {
                    isrmsProtect = false;
                }
            }



            try
            {
                pdfDoc.LoadPDF(fileName);

                return(true);
            }
            catch (System.Security.SecurityException sex)
            {
                String password = Interaction.InputBox("Please enter the document password:"******"Document Password", "");
                if (password.Equals(string.Empty))
                {
                    return(false);
                }

                if (pdfDoc != null)
                {
                    pdfDoc.Dispose();
                    pdfDoc = null;
                }
                pdfDoc = new PDFWrapper();
                pdfDoc.UserPassword = password;
                return(LoadFile(fileName));
            }
            catch (Exception ex)
            {
                return(false);
            }
        }