| Microsoft DirectX 8.1 (Visual Basic) | 
Defines the supported blend mode.
Enum CONST_D3DBLEND
    D3DBLEND_ZERO            =  1
    D3DBLEND_ONE             =  2
    D3DBLEND_SRCCOLOR        =  3
    D3DBLEND_INVSRCCOLOR     =  4
    D3DBLEND_SRCALPHA        =  5
    D3DBLEND_INVSRCALPHA     =  6
    D3DBLEND_DESTALPHA       =  7
    D3DBLEND_INVDESTALPHA    =  8
    D3DBLEND_DESTCOLOR       =  9
    D3DBLEND_INVDESTCOLOR    = 10
    D3DBLEND_SRCALPHASAT     = 11
    D3DBLEND_BOTHSRCALPHA    = 12
    D3DBLEND_BOTHINVSRCALPHA = 13
End Enum
In the member descriptions above, the RGBA values of the source and destination are indicated by the subscripts s and d.
These flags are used to set the value of the D3DRS_SRCBLEND and D3DRS_DESTBLEND render states for the CONST_D3DRENDERSTATETYPE enumeration.