need some help with function detouring

[Keinshen1]

Hi,
I new in this so sorry if I act silly...

I've tried to recall "addMessageToChatWindow" from s0beit(or d3d9.dll module)
[ SCREENSHOTS IN THE ATTACHMENTS ]

I wrote this on my blank CPP project:

Spoiler: code

#include <Windows.h>
#include <iostream>

void Main()
{
    DWORD dwS0b = (DWORD)GetModuleHandleA("d3d9.dll");

    while (true) {
        if (GetAsyncKeyState(VK_INSERT))
            ((void(__cdecl*)(const char* a1))(dwS0b + 0x83550))("Test 123");
    }
}

BOOL WINAPI DllMain(HMODULE hModule, DWORD dwReason, LPVOID lpReserved) {
    static HANDLE hThread;

    switch (dwReason)
    {
    case DLL_PROCESS_DETACH:
        if (hThread)
            TerminateThread(hThread, 0);
        break;

    case DLL_PROCESS_ATTACH:
        DisableThreadLibraryCalls(hModule);
        hThread = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)Main, 0, 0, 0);
        break;
    }
    return TRUE;
}

And seems like it's crashing...
Can someone tell me why or give me an example of how it should be ?

 

[Parazitas]

void SAMP::CChat::AddMessage(D3DCOLOR color, const char *szText) {    ((void(__thiscall *)(CChat *, D3DCOLOR, const char *))SAMP_ADDROF(0x645A0))(this, color, szText);
}

https://github.com/BlastHackNet/SAMP-API/blob/master/src/0.3.7-R1/CChat.cpp

 

[Keinshen1]

void SAMP::CChat::AddMessage(D3DCOLOR color, const char *szText) {    ((void(__thiscall *)(CChat *, D3DCOLOR, const char *))SAMP_ADDROF(0x645A0))(this, color, szText);
}

https://github.com/BlastHackNet/SAMP-API/blob/master/src/0.3.7-R1/CChat.cpp

My idea is to understand how functional calling works and I just want to make this specific function to work...

Again this function is in d3d9.dll module (s0beit dll) and its should be easy, yet not working...

 

[Keinshen1]

@0x688 @springfield

 

[Parazitas]

@RapidFireProjectAttack

 

[0x_]

Where do you get the THIS pointer? Your class? Or exactly the same as in your linked CChat.cpp?
Please post a crashlog.