Cheat Engine

[tanjiajun_34]

I only have idea about creating a exe.
Do we still use read or writeprocessmemory like exe?

[Slugsnack]

no once your dll is in the target's memory space you have direct access to its memory

[tanjiajun_34]

How to code to make my dll read and write own memory then?

[Stylo]

use the asm keyword to execute assembler code that edits the memory of the current process
that's one way

[tanjiajun_34]

If you inject to dll to a gamguard game example sa or gb.
Then, will you be able to bypass the ring0 hooks thingy?

And also how to write to the pointed addresses using asm?
I tried a lot of methods........

Note:I used 00400000 as pointer address. 100 as offset. And the value I wanted it to change to is 1.

Method 1 (Got access violation error, no effect too)

[Hologram]

If you mean you can access your value this way:
[[00400000] + 100]
than try following:

[tanjiajun_34]

I changed to

[hcavolsdsadgadsg]

why don't you just call the delphi equivilent of memcpy?

or http://msdn.microsoft.com/en-us/library/aa366535%28VS.85%29.aspx

[Hologram]

...or the shorthand PBYTE(PDWORD($00400000)^ + 100)^ := 1;

if it doesn't work than it seems you don't have the right address-offset pair

[Dark Byte]

perhaps it's giving an access violation because the pointer you are giving is just wrong ?
00400000 contains a pointer to a valid address? I really doubt it

[tanjiajun_34]