I have been trying to learn to use d3d im. I made a quick sample, that should render a square on the screen, but I can''t seem to get it to work. Could someone tell me if there is something I am not doing right, or not doing at all? The following is the most important parts of the program: D3DVERTEX Square[12]; Square[0].dvX = 0.0; Square[0].dvY = 0.0; Square[0].dvZ = 0.0; Square[0].dvNX = 0.0; Square[0].dvNY = 0.0; Square[0].dvNZ = 0.0; Square[1].dvX = 0.0; Square[1].dvY = 1.0; Square[1].dvZ = 0.0; Square[1].dvNX = 0.0; Square[1].dvNY = 0.0; Square[1].dvNZ = 0.0; Square[2].dvX = 1.0; Square[2].dvY = 1.0; Square[2].dvZ = 0.0; Square[2].dvNX = 0.0; Square[2].dvNY = 0.0; Square[2].dvNZ = 0.0; Square[3].dvX = 0.0; Square[3].dvY = 0.0; Square[3].dvZ = 0.0; Square[3].dvNX = 0.0; Square[3].dvNY = 0.0; Square[3].dvNZ = 0.0; Square[4].dvX = 1.0; Square[4].dvY = 0.0; Square[4].dvZ = 0.0; Square[4].dvNX = 0.0; Square[4].dvNY = 0.0; Square[4].dvNZ = 0.0; Square[5].dvX = 1.0; Square[5].dvY = 1.0; Square[5].dvZ = 0.0; Square[5].dvNX = 0.0; Square[5].dvNY = 0.0; Square[5].dvNZ = 0.0; Square[6].dvX = 0.0; Square[6].dvY = 0.0; Square[6].dvZ = 0.0; Square[6].dvNX = 0.0; Square[6].dvNY = 0.0; Square[6].dvNZ = 0.0; Square[8].dvX = 0.0; Square[8].dvY = 1.0; Square[8].dvZ = 0.0; Square[8].dvNX = 0.0; Square[8].dvNY = 0.0; Square[8].dvNZ = 0.0; Square[7].dvX = 1.0; Square[7].dvY = 1.0; Square[7].dvZ = 0.0; Square[7].dvNX = 0.0; Square[7].dvNY = 0.0; Square[7].dvNZ = 0.0; Square[9].dvX = 0.0; Square[9].dvY = 0.0; Square[9].dvZ = 0.0; Square[9].dvNX = 0.0; Square[9].dvNY = 0.0; Square[9].dvNZ = 0.0; Square[11].dvX = 1.0; Square[11].dvY = 0.0; Square[11].dvZ = 0.0; Square[11].dvNX = 0.0; Square[11].dvNY = 0.0; Square[11].dvNZ = 0.0; Square[10].dvX = 1.0; Square[10].dvY = 1.0; Square[10].dvZ = 0.0; Square[10].dvNX = 0.0; Square[10].dvNY = 0.0; Square[10].dvNZ = 0.0; D3DMATRIX matWorld, matView, matProjection; matWorld._11 = matWorld._22 = matWorld._33 = matWorld._44 = 1.0; D3DDevice->SetTransform(D3DTRANSFORMSTATE_WORLD, &matWorld); matView = matWorld; matView._42 = 10.0; D3DDevice->SetTransform(D3DTRANSFORMSTATE_VIEW, &matView); float w, h, q; w = 0.75 * (cosf(0.375) * sinf(0.375)); h = 1.0 * (cosf(0.375) * sinf(0.375)); q = 1000.0 / (999.0); matProjection._11 = w; matProjection._22 = h; matProjection._33 = q; matProjection._34 = 1.0; matProjection._43 = -q * 1.0; D3DDevice->SetTransform(D3DTRANSFORMSTATE_PROJECTION, &matProjection); D3DDevice->SetRenderState(D3DRENDERSTATE_LIGHTING, false); HRESULT hRet; RECT copyrect; copyrect.left = 0; copyrect.top = 0; copyrect.right = 640; copyrect.bottom = 480; while (!(KeyboardBuffer[DIK_ESCAPE] & 0x80)) { hRet = DIDKeyboard->GetDeviceState(sizeof(KeyboardBuffer), (LPVOID)&KeyboardBuffer); if (hRet != DI_OK) DIDKeyboard->Acquire(); D3DDevice->Clear(0, NULL, D3DCLEAR_TARGET, 0x00000000, 1.0, 0); hRet = D3DDevice->BeginScene(); if (hRet == D3D_OK) { D3DDevice->DrawPrimitive(D3DPT_TRIANGLELIST, D3DFVF_VERTEX, &Square, 12, 0); D3DDevice->EndScene(); } hRet = DDSBack->BltFast(0, 0, DDSRender, &copyrect, 0); if (hRet != DD_OK) { DDSBack->Restore(); DDSPrimary->Restore(); DDSRender->Restore(); } hRet = DDSPrimary->Flip(NULL, 0); if (hRet != DD_OK) { DDSBack->Restore(); DDSPrimary->Restore(); DDSRender->Restore(); } } Thanks for any help!

You must use non zero normals for correct shading and your triangle vertexes must follow in clockwise order.