Start-> run-> dxdiag
DirectX 10 is the newest standard.
There is no need to download DirectX for Vista. it already bundles the latest version of DirectX.
DirectX 8.1 is old and unsupported. You would be better served by upgrading your 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10.0 (initially included in Windows 7) did not include support for DirectX 9.0c, a decision that Microsoft ultimately repealed when DirectX 10.1 was released.
DirectX is an integral component of the Windows operating system. If a newer version exists for your operating system, you will find via the Windows Update applet in Control Panel.
gta4 needs directx 9,10,11
it is difficult to give a precise answer in a couple of words: the directx libraries are huge. However, the idea is that these libraries expose an api (a set of instructions) that allow game programmers to easily develop software. For example they don't have to deal with the particular aspects of each video card: that is done by directX and by the drivers. What kind of functionality directX expose: for ex. you have an image and you need to move it. Passing appropriate parameters, directX will do that for you. Also there are implementations for sound, etc. This is what one can do with directX. It is the bread and butter for game programmers that target Microsoft platforms. Make no mistake though: you don't get to do something till you spend some time studying.
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.
DirectX Diagnostic Tool helps you troubleshoot issues with the DirectX suite of multimedia technologies that come with Windows. If you're having trouble getting game animation or a movie to run properly, you should run DirectX Diagnostic Tool to try to find the source of the problem. To run DirectX Diagnostic Tool: Open DirectX Diagnostic Tool by clicking the Start button , typing dxdiag in the Search box, and then pressing ENTER. and then troubleshoot as the dialog box says...
yes, directX 10 should be fine