[C++] EndScene Hook Problems

[ejt]

Hello,

I would first like to say that I have checked the forum for some time and also google so don't give me "google is your friend" and stuff like that.

I'm trying to hook EndScene function so that I can continue with calling of FrameBuffer etc. The problem I have is that my endscene hook never gets fired, I have tried alot of different codes from all kinds of sources including alot from this forum. I now ask for your help to sort this out.
I am kind of a noob in ASM and my code will probably hurt your eyes, if you can't stand it, press the back button and read another thread.

Heres my code:

Getting EndScene function from VTable:

void Memory::GetDirectX9EndScene(HWND hWnd)
{ // hWnd is my window I create inside my DLL and is valid.
	D3DPRESENT_PARAMETERS d3dpp;
	LPDIRECT3DDEVICE9 d3dDevice;
	LPDIRECT3D9 d3d;

	ZeroMemory(&d3dpp, sizeof(d3dpp));

	d3d = Direct3DCreate9(D3D_SDK_VERSION);

	d3dpp.Windowed = TRUE;
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.hDeviceWindow = hWnd;

	d3d->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &d3dDevice);

	pVTable = (u32*)*((u32*)d3dDevice); // unsigned int*
	pEndScene = (void*)pVTable[42]; // void*

// I already know I don't clean up after myself but don't need you to tell me that :)
}

My hook function that never gets fired:

HRESULT WINAPI EndScene_Hook(IDirect3DDevice9 *pDevice)
{
	MessageBox(0, "", "", MB_OK);
	return EndScene_Orig(pDevice); // Yes, I know this isn't set to anything
}

How I try to install my hook:

bool Memory::InstallEndSceneHook()
{
	BYTE* bCode = new BYTE[5];
	memset(bCode, 0x90, 5);
	DWORD dwFunc = (DWORD)EndScene_Hook - ((DWORD)pEndScene + 5);

	bCode[0] = 0xE9; // JMP
	*(DWORD*)&bCode[1] = dwFunc;

	DWORD dwOld;

	if(!VirtualProtect((void*)pEndScene, 5, PAGE_READWRITE, &dwOld))
		return false;

	memcpy((void*)pEndScene, (void*)bCode, 5);

	VirtualProtect((void*)pEndScene, 5, dwOld, &dwOld);

	return true;
}

Any help is very much appreciated .

[DarthTon]

Have you checked pEndScene value? Is it correct and points to correct function? Are you sure you run DX 9 and not DX 11?
Simple debugging can tell you more about possible causes.

[ejt]

Have you checked pEndScene value? Is it correct and points to correct function? Are you sure you run DX 9 and not DX 11?
Simple debugging can tell you more about possible causes.

*hits face in desk*

Wow was reset to DX11 thats why it didnt work. Thank you for your help.