[MSDN Library April 2000] Overlay, Underlay, and Main Planes (91.5094339622642%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > OpenGL > Win32 Extensions to OpenGL > OpenGL on Windows NT, Windows 2000, and Windows 95/98

[MSDN Library April 2000] Overlay Mixer (20.8904330963154%)

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

[MSDN Library April 2000] Overlay Surface Overview (17.4342814048696%)

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

[MSDN Library April 2000] Overlay Z-Orders (15.9636931695755%)

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

[MSDN Library April 2000] Overlay Color Keys (15.9636931695755%)

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