How to install DX9 in WinXP

Presumably many of my friends have used a Windows XP operating system called VLK (major account in Shanghai) version. The reason why we choose it is nothing more than integrated SP2 and DirectX 9.0b (DX 9.0b) this seemingly flawless XP version exposes a small problem because of Microsoft's release of DirectX 9.0c, the story has to be explained from the last time I helped my friend reinstall the system ......

On one occasion, a friend of the author had a problem with his computer. Let me see it. At that time, I saw some old software on the computer, I used the VLK WinXP version I have been using to help my friends reinstall the system. In the days that followed, I was always safe, but my friend who was naturally fond of cars suddenly bought a movie on that day, but he couldn't install it anyway, so he called me ......

Friend: "Hey, is it magnificent ?"

Me: "Oh, Lao Zhang? Is there anything ?"

Friend: "Well, I bought a movie yesterday, but I cannot install it. After I double-click it, the system prompts that XXX files are missing"

Me: "file missing? Is there a problem with the software ?"

Friend: "It should be okay. I was not sure at the time, so I asked my colleagues to install it on another computer. It is quite normal that the machine configuration is not as high as mine"

[Aside] I do not play games at ordinary times, so when I encounter a game problem, I am a little confused. I only want to think about it as a general idea. Please do not laugh at the top of the game players.

Me: "The configuration is not as high as that in the house. Should it be 98? What system is that machine ?"

[Next] In fact, it is not like the system does not support such a new game, the running platform certainly supports XP, and the components of this XP version are very high, and the machine configuration of friends is not low, however, all possible problems must be compared.

Friend: "like at home, it's also XP. In the past, our unit's computer was installed by him"

[Side] All 3D games require DirectX support. Which version of DirectX should this new game use? Will it be higher than the integrated 9.0b?

Me: "By the way, do you have any DirectX version requirements in the game installation instructions ?"

Friends: busy reading ...... "Yes, yes, it's DirectX 9.0c, but this is also installed ."

I: I thought, it seems that the phone call is wrong. Maybe it is a system fault. Let's take a look at it. Anyway, a Ghost backup was left at the time, so I said to my friend, "well, lao Zhang, tomorrow is Saturday. If you're fine in the morning, I'll check it out, or you can't tell me on the phone."

Friend: "Well, I will wait for you at home tomorrow ."