Includes

No. Take a look at the first few lines of Windows.h. It should be something like:

#ifndef _WINDOWS_H_
#define _WINDOWS_H_

and the last line should be a corresponding

#endif,

telling the compiler that this file shouldn''t be compiled if _WINDOWS_H_ is already defined (which is done when the compiler enters the file for the first time).

Note: I don''t have access to windows.h right now, so _WINDOWS_H_ may not be the #define that is actually used.

Crispt

It won''t slow down your program, but it''ll slow down compilation if it''s in more places than necessary.

A good rule of thumb is to only include things in a .cpp file if something in that file needs them, and only include something in a .h file if something including it won''t compile without it.

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