The d3dx9_40.dll file
According to our database, the d3dx9_40.dll file is part of the Microsoft DirectX for Windows product, so the d3dx9_40.dll file may get onto your computer through the installation of Microsoft DirectX for Windows.
Table of contents:
- The d3dx9_40.dll file's details
- The DLL files related to the d3dx9_40.dll file
- The links related to the d3dx9_40.dll file
- The d3dx9_40.dll's possible errors
- Downloading the d3dx9_40.dll file
- Use the System File Checker tool
- Register the d3dx9_40.dll file in Windows
The d3dx9_40.dll file's details
Below, we summarized the details of the d3dx9_40.dll file that has been registered by us. Of course, the d3dx9_40.dll may exist in versions differing from these.
- 4.18 MB (4379984 B)
- Internal name:
- Original filename:
- Direct3D 9 Extensions
- © Microsoft Corporation. All rights reserved.
- Microsoft Corporation
- Microsoft DirectX for Windows
- Product version:
- Self registration:
The DLL files related to the d3dx9_40.dll file
Beside the d3dx9_40.dll file, Microsoft DirectX for Windows may install other DLL files as well. Of course, the installed files might be different by version.
The links related to the d3dx9_40.dll file
We try to collect the websites where you can find further information about the d3dx9_40.dll file.
The d3dx9_40.dll's possible errors
If the d3dx9_40.dll file isn't correctly installed in your system, then you may receive the following error message:
The causes of the error could be the following:
- Due to an error that may lead to losing data, the d3dx9_40.dll file is inaccessible or damaged. Try reinstalling the application.
- The antivirus software may have blocked the d3dx9_40.dll file's access. Check the files quarantined by the antivirus software.
- The Windows registry’s database is damaged. With the help of Windows System Restore, you can return to a previous state with system settings that still work.
Downloading the d3dx9_40.dll file
We don't advise to download the d3dx9_40.dll file and copy it to the Windows system directory. The software's creators almost never circulate the DLL files, they are always part of an installation set. It's the installation set's task to perform the sufficient verifications before the installation. An incorrectly installed DLL file may cause the system's complete inability to function.
If you need a DLL file in spite of the above for the sake of restoring a system, then download it from a reliable source, possibly from the manufacturer's site.
Use the System File Checker tool
To solve the d3dx9_40.dll file's problems, check if the system files are intact as a first step.
System File Checker (SFC.exe) is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files. If a Windows Resource Protection (WRP) file is missing or is corrupted, Windows may not behave as expected. For example, some Windows functions may not work, or Windows may crash.
To scan all system files, open a command prompt as an administrator and type:
This command will scan all protected system files, and replace corrupted files with a cached copy that is located in a compressed folder at System32\dllcache.
Register the d3dx9_40.dll file in Windows
The Regsvr32 tool is a command-line utility that can be used for registering and un-registering OLE controls like DLL and ActiveX (OCX) controls in the Windows operating system. If you find that some of your Windows functions are not working properly, you may need to register your dll files.
To register the d3dx9_40.dll file, open a command prompt as an administrator and type:
To un-register the d3dx9_40.dll file, open a command prompt as an administrator and type:
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Supported operating systems
Windows Server 2003/2008/2012, Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10
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