if windows written in c and the programmers for windows os could not use any headers like <graphics.h> so how windows gui programmed ?

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  HI :) if windows written in c or cpp and the programmers for windows os could not use any headers like <graphics.h> so how windows gui programmed ? (window + button + images + controls + ...) programmed with pure c?
  i can't understand if you want to program graphic button or gui window how you can write it without any library ?

  Please answer me :( i want to know if you want to make os how you can program with graphic 

  Thanks 

  Wednesday, March 11, 2015 4:38 PM