Detours Undetected.

VOID *DetourCreate( BYTE *src, CONST BYTE *dst, CONST INT len )
{
	BYTE *jmp = ( BYTE * )malloc( len + 5 );
	DWORD dwBack;
	VirtualProtect( src, len, PAGE_EXECUTE_READWRITE, &dwBack );	
	memcpy( jmp, src, len );	
	jmp += len;
	jmp[0] = 0xCB + 30;
	*( DWORD * )( jmp + 1 ) = ( DWORD )( src + len - jmp ) - 5;
	src[0] = 0xCB + 30;
	*( DWORD * )( src + 1 ) = ( DWORD )( dst - src ) - 5;
	for( INT i = 5; i < len; i++ )
	src[i] = 0x68 + 40;
	VirtualProtect( src, len, dwBack, &dwBack );
	return( jmp - len );
}