Aspose.Words  for C++

Encrypt DOTX Files via C++

Password-protect Word documents including DOTX format using .NET Library.

How to Secure DOTX File Using C++

In order to protect DOTX file, we’ll use

Aspose.Words for C++

API which is a feature-rich, powerful and easy to use document encryption API for C++ platform. You can download its latest version directly, just open


package manager, search for Aspose.Words.Cpp and install. You may also use the following command from the Package Manager Console.


PM> Install-Package Aspose.Words.Cpp

Steps to Protect DOTX Files via C++

Document protection using Aspose.Words APIs can be done with just few lines of code.

  1. Load DOTX file
  2. Use Protect() method with ProtectionType & password
  3. Save the protected file using Save() method

System Requirements

Aspose.Words for C++ supports on all major platforms and Operating Systems. Please make sure that you have the following prerequisites.

  • Microsoft Windows or a compatible OS with C++ Runtime Environment for Windows 32 bit, Windows 64 bit and Linux 64 bit.
  • Aspose.Words for C++ DLL referenced in your project.


// Load DOTX document
System::SharedPtr<Document> dotx = System::MakeObject<Document>(sourceFile);

// Protect the document
dotx->Protect(ProtectionType::AllowOnlyFormFields, u"password");

// Save the DOTX file
  • About Aspose.Words for C++ API

    Aspose.Words API can be used to load, view and convert Microsoft Word and OpenDocument Formats like DOC, DOCX, ODT to PDF, XPS, HTML and various other formats. You can also create new documents from scratch and save them in the supported formats. Aspose.Words is a standalone API that is suitable for server side and backend systems where high performance is required. It does not depend on any software like Microsoft or OpenOffice. ‎

    Free App to Protect DOTX

    DOTX What is DOTX File Format

    Files with DOTX extension are template files created by Microsoft Word to have pre-formatted settings for generation of further DOCX files. A template file is created in order to have specific user settings that should be applied to subsequent flies created from these. These settings include page margins, borders, headers, footers, and other page settings. Such templates are used in official documents such as company letterheads and standardized forms. The DOTX file format was introduced with the release of Microsoft Office 2007 to replace the binary DOT file format, but is supported by higher versions as well. Microsoft Word by default opens every new document based on file. If modified, all the new files created will result in same settings as from the template file. In Microsoft Word 2007, the DOT file format has been replaced with Office OpenXML based DOTX file format.

    Read More

    Other Supported Protection Documents

    Using C++, one can protect other files including.

    DOC (Microsoft Word Binary Format)
    DOCX (Office 2007+ Words Document)
    DOT (Microsoft Word Template Files)
    ODT (OpenDocument Text File Format)
    OTT (OpenDocument Standard Format)