D3D-Hook Problem

 
#include <windows.h>
#include <cstdio>
#include <d3d9.h>
#include <d3dx9.h>
 
 
 
//LPDIRECT3DDEVICE9 pDevice;
const D3DCOLOR txtPink = D3DCOLOR_ARGB(255, 255, 0, 255); // Alpha, Rot, Grün, Blau
void InitHook();
void *DetourFunc(BYTE *src, const BYTE *dst, const int len);
typedef HRESULT(__stdcall* EndScene_t)(LPDIRECT3DDEVICE9);
void DrawRect (LPDIRECT3DDEVICE9 Device_t, int X, int Y, int L, int H, D3DCOLOR color);
EndScene_t pEndScene;
 
 
 
HRESULT __stdcall hkEndScene(LPDIRECT3DDEVICE9 pDevice)
{
DrawRect (pDevice, 10, 10, 200, 200, txtPink);
return pEndScene(pDevice);
}
 
 
int WINAPI DllMain(HINSTANCE hInst,DWORD reason,LPVOID reserved)
{
        switch(reason)
        {
        case DLL_PROCESS_ATTACH:
                // Hier kommt unser Code rein
			CreateThread(0, 0, (LPTHREAD_START_ROUTINE) InitHook, 0, 0, 0);
                break;
        }
        return true;
}
 
 
 
void InitHook()
{        HMODULE hModule = NULL;
        while( !hModule )
        {
                hModule = GetModuleHandleA( "d3d9.dll" ); // Handle zur DLL holen
                Sleep( 100 ); // 100ms warten
        }
 
 
		pEndScene = ( EndScene_t )DetourFunc((PBYTE)0x74A447AF,(PBYTE)hkEndScene, 5);
 
 
}
 
void DrawRect (LPDIRECT3DDEVICE9 Device_t, int X, int Y, int L, int H, D3DCOLOR color)
{
D3DRECT rect = {X, Y, X+L, Y+H};
Device_t->Clear(1, &rect, D3DCLEAR_TARGET, color, 0,  0); // bei Google gibt’s näheres
}
 
 
void *DetourFunc(BYTE *src, const BYTE *dst, const int len) // credits to gamedeception
{
BYTE *jmp = (BYTE*)malloc(len+5);
DWORD dwback;
VirtualProtect(src, len, PAGE_READWRITE, &dwback);
memcpy(jmp, src, len); jmp += len;
jmp[0] = 0xE9;
*(DWORD*)(jmp+1) = (DWORD)(src+len - jmp) - 5;
src[0] = 0xE9;
*(DWORD*)(src+1) = (DWORD)(dst - src) - 5;
VirtualProtect(src, len, dwback, &dwback);
return (jmp-len);
}