i''ve tryed to initialize a 3d object with Direct3DCreate(). i defined : (in c#) -------------- kind ---- variable---------- ------------------------ ------------------ private static Direct3D8 g_D3D = null; private static DirectX8 g_DX = null; then when the form loaded i call the function that initialize that 3d object : ------------------------------------------------- public static void int3d() { g_D3D = g_DX.Direct3DCreate(); } ------------------------------------------------- & allways the compiler throw a null exeption ..... allways .... Want''s the problem ? Abe M., Israel, Jerusalem