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AutoCAD 2025 Developer and ObjectARX
    • Customization and Administration Guides
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    • ObjectARX and Managed .NET
      • ObjectARX: Developer's Guide
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      • ObjectARX: Managed .NET Developer's Guide
      • ObjectARX: Managed .NET Reference Guide
      • ObjectARX: Interoperability Guide
      • ObjectARX: Migration Guide
        • General Development Compatibility (ObjectARX/.NET)
        • Migrate from AutoCAD 2024 and Earlier
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        • Migrate from AutoCAD 2018 and Earlier
          • Removal of Header Files (ObjectARX)
          • Graphics System Changes (ObjectARX)
          • Handling the New Tab Page (ObjectARX/.NET)
          • 64-bit Migration Guide
            • Overview of 64-bit Architecture
            • 64-Bit Project Setup with Microsoft Visual Studio
            • Porting ObjectARX Code to 64 Bits
              • Single Sourcing with Polymorphic Types
              • Porting Strategy: Use Compiler Warnings
              • ObjectARX API Porting Considerations
              • Visual C++ Changes
                • Name Mangling
                • In-line Assembly Code
                • Data Alignment
                • Compiler Tips
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      • ObjectARX: Release Notes
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    Visual C++ Changes

    This section briefly describes Visual C++ compiler changes that may affect your porting efforts. Consult the Visual C++ Help system and MSDN online for further information.

    Topics in this section
    • Name Mangling
    • In-line Assembly Code
    • Data Alignment
    • Compiler Tips
    Parent topic: Porting ObjectARX Code to 64 Bits

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