The definition of the internal DirectX D3DPRIMCAPS object is as follows:

struct D3DPRIMCAPS {
DWORD dwSize;
DWORD dwMiscCaps;
DWORD dwRasterCaps;
DWORD dwZCmpCaps;
DWORD dwSrcBlendCaps;
DWORD dwDestBlendCaps;
DWORD dwAlphaCmpCaps;
DWORD dwShadeCaps;
DWORD dwTextureCaps;
DWORD dwTextureFilterCaps;
DWORD dwTextureBlendCaps;
DWORD dwTextureAddressCaps;
DWORD dwStippleWidth;
DWORD dwStippleHeight;
};