Autocad 2015 Vba Module 64-bit -
Before diving into the 64-bit module, you must understand Autodesk’s rationale. VBA relies heavily on ActiveX and COM interfaces. As Autodesk moved towards a more secure, multi-threaded, and 64-bit native environment, embedding VBA became a liability. Old 32-bit VBA code could cause memory access violations and crashes in a 64-bit host process.
Consequently, starting with AutoCAD 2010, Autodesk made VBA a separate, optional download. AutoCAD 2015 continues this tradition. The 64-bit version of AutoCAD 2015 requires a specifically compiled 64-bit VBA module (often referred to as the "VBA Enabler") to interact with the 64-bit acad.exe process.
Without this module, menus like "Tools → Macros → VBA Manager" will be grayed out or missing entirely.
In 32-bit VBA, memory pointers and handles were stored in 32-bit integers (Long data type). In a 64-bit environment, pointers are 64-bit integers. Storing a 64-bit pointer in a 32-bit Long variable results in data truncation and overflow errors.
The Solution: AutoCAD 2015 VBA supports the LongPtr data type introduced in the VBA 7.1 update. autocad 2015 vba module 64-bit
Developers must use the PtrSafe keyword in API declarations and replace Long with LongPtr for any variable handling memory addresses or window handles.
If your VBA code uses Windows API functions (e.g., FindWindow, GetTickCount), you must update all Declare statements with the PtrSafe keyword. Example:
Incorrect for 64-bit:
Declare Function GetTickCount Lib "kernel32" () As Long
Correct for 64-bit:
Declare PtrSafe Function GetTickCount Lib "kernel32" () As Long
| Legacy 32-bit | 64-bit Replacement |
| :--- | :--- |
| Declare Function FindWindow | Add PtrSafe, change Long to LongPtr |
| Declare Sub CopyMemory (RtlMoveMemory) | Use LongPtr for source/dest pointers |
| Declare Function SendMessage | wParam and lParam become LongPtr |
Warning: If you do not use any Windows API calls and only use the AutoCAD Object Model (e.g., ThisDrawing.ModelSpace), you likely do not need to change your code at all—provided you recompile it.
Even after installation, issues arise. Here is a troubleshooting checklist.
| Technology | Language | 64-bit Support | Learning Curve |
| :--- | :--- | :--- | :--- |
| AutoLISP | Lisp | Native (via VLX) | Moderate |
| Visual LISP | Lisp | Native | Moderate |
| .NET (C#/VB.NET) | C#, VB | Full, using AcMgd.dll | Steep |
| ObjectARX | C++ | Full, max performance | Very Steep |
| ScriptPro | Script | Limited | Low | Before diving into the 64-bit module, you must
For most users migrating from 32-bit VBA, AutoLISP is the path of least resistance. You can call AutoLISP functions from VBA using ThisDrawing.SendCommand as a bridge, then gradually rewrite routines.
Unlike older versions of AutoCAD, VBA is not installed by default in AutoCAD 2015. It must be deployed separately.
Step-by-Step Installation: