i have some question for the hook code

[MULE2002]

The first figure is a physical machine test, the function address pointer before the selected line of unhook is 00000, and the output statement corresponds to line 12 of the source code



The third figure is a virtual machine, the hook is successful, and the unhook address value is normal.
0x2b3c90 is also not an offset from NtUserSetSysColors.


I was very confused by the piece of code, I wanted to know how 0x2b3c90 this offset was found and what it was for, I tried to change its value to 0x2b3c91, and not surprisingly, bosd

[MULE2002]

I would very much like to know, which has puzzled me for three days, and I would appreciate it if you could answer it.

[Oxygen1a1]

我很想知道，这个问题困扰了我三天，如果您能解答，我将不胜感激。

他用的data ptr通信 这个0x2b3c90 是win11 win32kbase.sys 的win32freepool的硬编码地址