[MSDN Library April 2000] Overlay Z-Orders (100%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > DirectX > DirectDraw > DirectDraw Essentials > Surfaces > Overlay Surfaces

[MSDN Library April 2000] Overlay Color Keys (90.2777777777778%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > DirectX > DirectDraw > DirectDraw Essentials > Surfaces > Overlay Surfaces

[MSDN Library April 2000] Overlay Surface Overview (85.4166666666667%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > DirectX > DirectDraw > DirectDraw Essentials > Surfaces > Overlay Surfaces

[MSDN Library April 2000] Overlay Surfaces (43.2291666666667%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > DirectX > DirectDraw > DirectDraw Essentials > Surfaces

[MSDN Library April 2000] Overlay Mixer (33.3881578947368%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > DirectX > DirectX Media SDK > DirectAnimation > Glossary > DirectShow > Filters and Samples > DirectShow Filters