DetourUndetected

LPVOID DetourCreate(BYTE *src, CONST BYTE *dst, CONST INT len)
{
	BYTE *jmp = (BYTE*)malloc(len + 5);
	DWORD dwBack;
	VirtualProtect(src, len, PAGE_READWRITE, &dwBack);
	memcpy(jmp, src, len);
	jmp += len;
	jmp[0] = '\xE9';
	*(DWORD*)(jmp + 1) = (DWORD)(src + len - jmp) - 5;
	
	src[0] = '\xB8';
	src[5] = '\x83';
	src[6] = '\xC0';
	src[7] = '\x01';
	src[8] = '\xFF';
	src[9] = '\xE0';
	
	*(DWORD*)(&src[1]) = (DWORD)(dst - 1);
	for (INT i = 10; i < len; i++) src[i] = 0x90;
	VirtualProtect(src, len, dwBack, &dwBack);
    
	return (jmp - len);
}

oPresent = (tPresent)DetourCreate((PBYTE) vTable[17], (PBYTE) &Present, 10);