I am trying to make a function that returns a vertex buffer when you pass an array full of vertex info. WHen i call trhe function and try to render the vb nothing happens. here is the code LPDIRECT3DVERTEXBUFFER8 POLY::CreateVertexBuffer( int numVerts, CUSTOMVERTEX * cstm) { LPDIRECT3DVERTEXBUFFER8 VtxB; if( FAILED( D3D_DEVICE->CreateVertexBuffer( numVerts*sizeof(CUSTOMVERTEX), 0, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &VtxB ) ) ) { MessageBox(hwnd,"Couldn''t create vb","Error",MB_OK | MB_ICONERROR); return NULL ; } // Fill the vertex buffer. VOID* pVertices; if( FAILED( VtxB->Lock( 0, sizeof(cstm), (BYTE**)&pVertices, 0 ) ) ) { MessageBox(hwnd,"Couldn''t create vb","Error",MB_OK | MB_ICONERROR); return NULL ; } memcpy( pVertices, cstm, sizeof(cstm) ); VtxB->Unlock(); //MessageBox(hwnd,"vb created successfully","Error",MB_OK | MB_ICONERROR); return VtxB ; } here is how i call the function fff=d3d_obj.poly_obj.CreateVertexBuffer(3,verts); does n e 1 see what the prob could be. "Computers are only as smart as their programers" My Site-> Still working on it.