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Text File  |  1996-06-13  |  424b  |  26 lines
  1. /*
  2. IsWindow.c
  3.  
  4. safely checks a suspect pointer, returning true if it points to a valid window.
  5.  
  6. HISTORY:
  7. 6/13/96 dgp wrote it.
  8. */
  9. #ifndef __LOWMEM__
  10.     #include <LowMem.h>
  11. #endif
  12. #ifndef __WINDOWS__
  13.     #include <Windows.h>
  14. #endif
  15. Boolean IsWindow(WindowPtr window);
  16.  
  17. Boolean IsWindow(WindowPtr window)
  18. {
  19.     WindowRef w=LMGetWindowList();
  20.     
  21.     while(w!=NULL){
  22.         if((WindowRef)window==w)return 1;
  23.         w=GetNextWindow(w);
  24.     }
  25.     return 0;
  26. }