The Old New Thing

What is the purpose of the bmPlanes member of the BITMAP structure?

December 1, 2004 Dec 1, 2004 12/1/04

Raymond Chen

Many bitmap-related structures in Windows have a field called "planes". For example the structure has a member (which must be set to 1). The structure has a field called . What's the deal with that field? The EGA video adapter supported 16 simultaneous colors. This was an enormous improvement over the CGA, which supported only four ...