How to Set Duplex Printing in Word VBA7 and 64-Bit Office
Question details
The user needs to configure a printer for duplex printing via Word automation using VBA7 in a 64-bit Office environment.
- Product
- Microsoft Word
- Device & OS
- Windows
- Scenario
- Automating document printing on both sides using VBA macros in a modern 64-bit Office setup.
- Observed behavior
- Classic 32-bit Windows API declarations fail in 64-bit environments, requiring updated pointer and printer structure data types to manipulate printer settings successfully.
Ensure you have developer access to modify VBA macros and verify that your physical printer hardware actually supports automatic two-sided (duplex) printing.
Update VBA Declarations for 64-Bit Compatibility
Update your Windows API declarations using PtrSafe and LongPtr to handle 64-bit memory addresses correctly when configuring printer settings.
In 64-bit Office environments, standard 32-bit API declarations will result in type mismatch or overflow errors. You must update your API calls to use VBA7 syntax, specifically implementing the PtrSafe keyword and the LongPtr data type to safely handle 64-bit memory pointers.
Open your VBA editor and add the 'PtrSafe' keyword to your Windows API 'Declare' statements (e.g., 'Declare PtrSafe Function OpenPrinter...') to indicate to the compiler that the function is safe for 64-bit execution.
Replace the standard 'Long' data type with 'LongPtr' for all printer handles (like hPrinter) and pointer fields within your structure definitions. This ensures variables are large enough to store 64-bit addresses without truncation.
Use the DocumentProperties API to fetch the current printer's DEVMODE structure. Locate the dmDuplex property within this structure and change its value to 2 (for short-edge binding) or 3 (for long-edge binding).
Write the modified DEVMODE structure back to the printer configuration using the DocumentProperties and SetPrinter API functions to finalize the duplex printing requirement.
Configure Duplex Printing via IT Group Policy
Network administrators can bypass complex VBA requirements by deploying a pre-configured duplex printer directly to all users.
Automate and Print Efficiently with WPS Writer
WPS Office provides robust support for VBA macros, allowing you to seamlessly execute advanced automation scripts like duplex printing. It offers a familiar interface and excellent compatibility with your existing Word macro projects.
- 1. Open WPS Writer: Launch WPS Writer and open the document you wish to print or automate.
- 2. Access the Developer Tab: Navigate to the Developer tab on the top ribbon to access the built-in VBA editor and macro tools.
- 3. Run Your Macro: Paste your updated 64-bit compatible VBA code into the module and execute it to automate your double-sided printing tasks.
Frequently Asked Questions
What does the PtrSafe keyword mean in VBA7?
PtrSafe is a keyword introduced in VBA7 that asserts a Declare statement is safe to run in 64-bit versions of Office. It is strictly required when calling external Windows API functions in a 64-bit environment to prevent compilation errors.
Why do I get a 'Type Mismatch' error with my old printer macros in 64-bit Word?
This error occurs because older 32-bit macros typically use the 'Long' data type for memory pointers. In 64-bit Office, a 'Long' is too small to hold a 64-bit memory address. You must replace 'Long' with 'LongPtr' for all handles and pointers.
What are the DEVMODE dmDuplex values for double-sided printing?
In the Windows API DEVMODE structure, setting dmDuplex to 1 means simplex (single-sided printing). Setting it to 2 enables duplex printing with short-edge binding (flip up), while 3 enables duplex with long-edge binding (flip over).
Can I force duplex printing without using VBA macros?
Yes. You can manually configure duplex printing by pressing Ctrl+P to open the Print menu, clicking on 'Printer Properties', and selecting the 2-sided printing option in your specific printer's driver settings.
