Windows 10: DLL Registration Fails with Exit Code 5 After Upgrading Platform Toolset to v142 in Visual...

I'm upgrading a C++ project from Visual Studio 2012 to Visual Studio 2019, changing the Platform Toolset from v110 to v142. The project builds successfully, but during registration of a DLL, I encounter the following error:The command "regsvr32 /s /c "Path/dll"error MSB3075: :VCEnd" exited with code 5. Please verify that you have sufficient rights to run this command.When attempting to manually register the DLL via an elevated command prompt, I get this error:The DLL is loaded, but registration failed with exit code 0x80029C4A. What I’ve tried:Checked Dependencies: Ran Dependency Walker t

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unable to register the dll/ocx regsvr32 failed with exit code 0x5

Hi

Welcome to Microsoft community.

The error message "unable to register the dll/ocx: regsvr32 failed with exit code 0x5" usually indicates a permissions issue. The exit code 0x5 stands for "Access is denied". This means that the process trying to register the DLL/OCX file doesn't have sufficient permissions to modify the registry.

Here are some steps you can take to resolve this issue:

1. Run as Administrator: Try running the installer or command prompt as an administrator. You can do this by right-clicking on the installer or Command Prompt and selecting "Run as administrator".
   
2. Disable User Account Control (UAC): Sometimes, User Account Control (UAC) can prevent registration of DLLs.
   
   • Press Windows key + R, type Control Panel and hit Enter.
     
   • Go to User Accounts > Change User Account Control settings.
     
   • Move the slider down to Never notify and click OK.
     
     Disclaimer: Follow these steps to temporarily disable User Account Control (UAC). However, keep in mind that if you do so, your device may be vulnerable to threats. So please turn on it immediately once issue fixed.
     
3. Use System File Checker: System File Checker (SFC) is a utility in Windows that allows users to scan for corruptions in system files and restore them.
   
   • Open Command Prompt as an administrator.
     
   • Type sfc /scannow and press Enter.
     
4. Check Permissions: Make sure your user account has full control over the folder where DLL/OCX file resides & also over related entries in Registry Editor.
   

Please let me know if you need any further assistance. Thank you.

Best regards

Derrick Qian | Microsoft Community Support Specialist

 

Supporting JUnit 5 in Visual Studio Code

Source: Supporting JUnit 5 in Visual Studio Code | The Visual Studio Blog

 

MFC MBCS DLL for Visual Studio 2019

I have Visual Studio 2019 installed on my machine with

C++ v14.24 MFC for v142 build tools (x86 & x64)

C++ v14.24 ATL for v142 build tools (x86 & x64)

I am attempting to build a legacy application but I am getting the following error:

MSB8031 Building an MFC project for a non-Unicode character set is deprecated. You must change the project property to Unicode or download an additional library. See MFC MBCS DLL Add-on for more information.

When this error occurs it directs me to a help page which encourages me to get the MFC MBCS DLL Add-on, but this is only available for Visual Studio 2013, not Visual Studio 2019 and will not install.

Changing the Character set to Multibyte isn't working but I need to stay with multibyte character set. Please suggest.