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.
Windows Vista. DirectX is an API, not a program, and as such it has no specific requirements. To use DirectX 10 hardware features, you need a capable video card.
DirectX 10.1 supports all DirectX 10.0 card, including the GMA X3100. However, DX 10.1 introduces new features that are not supported in the GMA X3100. Even NVIDIA hasn't released a card that uses 10.1 features yet.
dont know
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.
Not exactly. It doesn't support 11 directly, but 11 is backwards compatible with directx 10 (which the card originally came out with). So, it'll work with directx 11, just won't use the features only on that and not on 10
First open RUN then type DXDIAG then Directx diagnostic tool will appear then go to display. Below display there is Directx Features click it. Then enable the Direct draw Acceleration. Then TADA! you can play your warcraft now.
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10.0 (initially included in Windows 7) did not include support for DirectX 9.0c, a decision that Microsoft ultimately repealed when DirectX 10.1 was released.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
Graphics cards typically support DirectX 10, have a number of pixel and vector shaders and also support OpenGL.