RGBA_MAKE(r, g, b, a) \
((D3DCOLOR) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b)))
Creates an RGBA D3DCOLOR value from supplied red, green, blue, and alpha components.
·Returns the color.
r, g, b, and a
Red, green, blue, and alpha components of the RGBA color to be created.