#If VBA7 Then ' 64-bit compatible declaration Declare PtrSafe Function GetParent Lib "user32" (ByVal hWnd As LongPtr) As LongPtr #Else ' Legacy 32-bit declaration Declare Function GetParent Lib "user32" (ByVal hWnd As Long) As Long #End If Notice the keyword. This is mandatory for any Declare statement in 64-bit VBA. Without it, your module will throw a compile error. Common API Functions That Need Rewriting | 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 |
#If Win64 Then ' Specific 64-bit memory handling Dim ptr As LongLong #Else Dim ptr As Long #End If Click Debug → Compile VBA Project . This is the most revealing step. The compiler will flag every Long used as a pointer. Convert those to LongPtr . Do not blindly replace all Long with LongPtr —loop counters should stay Long for performance. Troubleshooting the AutoCAD 2015 64-Bit VBA Module Even after installation, issues arise. Here is a troubleshooting checklist. Issue: "VBA module failed to initialize" on startup Solution: This occurs when the acvba.arx file fails to load. Repair the VBA Enabler installation. Also, check for conflicting third-party ARX applications. Issue: "Compile error: The code in this project must be updated for use on 64-bit systems" Solution: This is a direct message from the VBA compiler. You have a Declare statement without PtrSafe . Review the Microsoft "64-Bit Visual Basic for Applications Overview" and add PtrSafe and LongPtr where appropriate. Issue: Running a macro does nothing or crashes AutoCAD Solution: This is likely a memory alignment issue. In 64-bit, structures (UDTs) passed to API calls must be aligned on 8-byte boundaries. Use Type...End Type with PtrSafe attributes. Alternatively, replace direct API calls with the native ThisDrawing.SendCommand or .NET interop. Issue: The VBA IDE shows "Out of Memory" when editing a large form Solution: This is a rare but known issue with the 64-bit VBA7 runtime. Workaround: Split your UserForm into multiple forms or move non-visual logic into standard modules. Alternatives to VBA in AutoCAD 2015 (64-Bit) Given the friction of migrating old VBA code, many organizations ask: Is VBA worth it on 64-bit? autocad 2015 vba module 64-bit
Introduction: The End of an Era and a New Beginning For decades, Visual Basic for Applications (VBA) was the backbone of automation in AutoCAD. It allowed millions of users to automate repetitive tasks, manipulate drawing databases, and create custom workflows. However, with the release of AutoCAD 2010 SP2, Autodesk made a pivotal shift: VBA was no longer included by default. By the time AutoCAD 2015 arrived, the landscape had changed entirely. The 64-bit environment was the standard, and the old 32-bit VBA modules were obsolete. #If VBA7 Then ' 64-bit compatible declaration Declare