You take the value of the first, and take it away from the second, and depending on the signs that are similar (positive/negative) they can cancel and override each other.
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they can override a fillibuster
Unfortunately error codes returned by DirectX rarely mean anything. The developers show extreme laziness in this regard. The only way you are going to get any information about your problem is via running DirectX in Debug mode with diagnostics output turned on. The diagnostics text is actually very useful. D3DERR_DRIVERINVALIDCALL = MAKE_D3DHRESULT(2157) = 0x8876086c = -2005530516 is defined in "d3d9.h"
Uninstalling DirectX 10 from Vista is impossible to my knowledge. Uninstalling the non-official DirectX 10 from XP is not. To so do, you'll need a computer that has whatever version you want to switch to, an uninstaller for 9.0 called UnDx9.bat, and an XP installation disc. Copy all the DirectX files listed by dxdiag from a computer with an earlier installed. 9.0c is confirmed to work. Override all DirectX files while in safe mode. Run a 9.0 uninstaller that replaces all your DirectX files from the Windows CD. It should replace your files with 8.1. Then replace the 8.1 files with the files copied from the other computer. Find the version number of DirectX for those files and find the registry values that the uninstaller adds to the registry. They should be in dxvfix.ini. Change the value for the version to whatever the version you're adding is. 4.09.0000.0904 is the number for 9.0c. Then run the latest updater for DirectX 9.0c and it should update some files. This should leave you with 9.0c.
DirectX 10 is the newest standard.
DirectX 8.1 is old and unsupported. You would be better served by upgrading your directX.
There is no need to download DirectX for Vista. it already bundles the latest version of DirectX.
DirectX is not about your operating system but it's about video card you have. Video cards available today support DirectX 11 and as far as you have drivers for such video card your will support DirectX. Make sure that you update DirectX.
DirectX 9.0c is not available for Windows 7; to actually install DirectX 9.0c, you would have to downgrade to Windows XP (any edition). In order to play games which require DirectX 9.0c without downgrading your installation of Windows, you must upgrade to DirectX 10.1 or later. DirectX 10.0 (initially included in Windows 7) did not include support for DirectX 9.0c, a decision that Microsoft ultimately repealed when DirectX 10.1 was released.
gta4 needs directx 9,10,11
There is no need to download DirectX 3. Versions of DirectX up to DirectX 9 are backwards-compatible. So if you have one version, you can use games and programs that require a previous version. Besides, the DirectX 3 installerwasmeant to be used only on Windows 95, and would probably cause problems if installed on later versions.
just download the program called KMDXC(Just Google it). After downloading select directx 10 and click patch.
yes, directX 10 should be fine
DirectX 10 is included with Windows Vista. It does not work on Windows XP.
There is no version of DirectX 10 for Windows XP.