device->SetFVF(D3DFVF_XYZ | D3DFVF_DIFFUSE);
device->SetFVF(D3DFVF_XYZ | D3DFVF_TEX1 | D3DFVF_NORMAL);In this example, we use three FVF flags: D3DFVF_XYZ for position data, D3DFVF_TEX1 for texture coordinate data, and D3DFVF_NORMAL for normal vector data. This tells the device driver to expect vertices with position (X, Y, Z), texture coordinates (u, v), and normal vector (nx, ny, nz), where u and v are floating-point values between 0 and 1 and nx, ny, and nz are floating-point values that represent the direction of the vertex normal. Package library: DirectX 9 Both examples demonstrate how to use LPDIRECT3DDEVICE9 SetFVF to specify the vertex format for rendering. This method is part of the DirectX 9 library in C++.