CONST_DDOVERZFLAGS
The flags in the CONST_DDOVERZFLAGS enumeration are used by the flags member in the DirectDrawSurface7.UpdateOverlayZOrder type to set the z-order of an overlay.
Enum CONST_DDPALFLAGS
    DDOVERZ_INSERTINBACKOF  = 5
    DDOVERZ_INSERTINFRONTOF = 4
    DDOVERZ_MOVEBACKWARD    = 3
    DDOVERZ_MOVEFORWARD     = 2
    DDOVERZ_SENDTOBACK      = 1
    DDOVERZ_SENDTOFRONT     = 0
End Enum
- DDOVERZ_INSERTINBACKOF
- Inserts this overlay in the overlay chain behind the reference overlay. 
- DDOVERZ_INSERTINFRONTOF
- Inserts this overlay in the overlay chain in front of the reference overlay. 
- DDOVERZ_MOVEBACKWARD
- Moves this overlay one position backward in the overlay chain.
- DDOVERZ_MOVEFORWARD
- Moves this overlay one position forward in the overlay chain.
- DDOVERZ_SENDTOBACK
- Moves this overlay to the back of the overlay chain.
- DDOVERZ_SENDTOFRONT
- Moves this overlay to the front of the overlay chain.