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Problem with WriteProcessMemory

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Stok3r
Guest

Posted: Tue Dec 04, 2012 7:48 am Post subject: Problem with WriteProcessMemory

Hi, I have a problem to create a trainer, this is the code:

Code:

Var WindowName : integer;
ProcessId : integer;
ThreadId : integer;
buf : PChar;
HandleWindow : Integer;
write : cardinal;

Const WindowTitle = 'Spider Solitaire';
Address = $0011DAC4;
PokeValue = $1F4; //500
NumberOfBytes = 4;

procedure TForm1.Button1Click(Sender: TObject);
begin
WindowName := FindWindow(nil,WindowTitle);
If WindowName = 0 then
begin
MessageDlg('The game must be running in the background.Run it now, and then try again.', mtwarning,[mbOK],0);
end;

ThreadId := GetWindowThreadProcessId(WindowName,@ProcessId);
HandleWindow := OpenProcess(PROCESS_ALL_ACCESS,False,ProcessId);

GetMem(buf,1);
buf^ := Chr(PokeValue);
WriteProcessMemory(HandleWindow,ptr(Address),buf,NumberOfBytes,write);
FreeMem(buf);
closehandle(HandleWindow);
end;

I tried when spider solitaire, but the problem is that I can only put 255 in pokevalue, if I overcome the 255 starts to go backwards, I put NumberOfByte = 4, but the maximum is always 255, why? Thank you all.

Sorry for my bad English.

atom0s
Moderator

Reputation: 205

Joined: 25 Jan 2006
Posts: 8587
Location: 127.0.0.1

Posted: Tue Dec 04, 2012 9:45 am Post subject:

Your buffer type is PChar, use a type that can hold more data. _________________ - Retired.

Stok3r
Guest

Posted: Wed Dec 05, 2012 8:06 am Post subject:

Wiccaan wrote:

Your buffer type is PChar, use a type that can hold more data.

I solved when using this code:

Code:

var
value:dword

{...}

value:=100;

WriteProcessMemory(HandleWindow,ptr(Address),@value,NumberOfBytes,write);

I have another problem, I found the pointer, but now how do I read the pointer address? Thanks!

Stok3r
Guest

Posted: Thu Dec 06, 2012 6:42 pm Post subject:

up

Screitor
Cheater

Reputation: 1

Joined: 26 Nov 2012
Posts: 33
Location: Venezuela

Posted: Thu Dec 06, 2012 7:14 pm Post subject:

Stok3r wrote:

I have another problem, I found the pointer, but now how do I read the pointer address? Thanks!

C'mon...

ReadProcessMemory.
_________________

Everybody lies.

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