#include <graphics.h>
int getwindowwidth(void);
 

The getwindowwidth function is available in the winbgim implementation of
BGI graphics. The function returns the total width of the window
including nondrawable border areas.

/* getwindowwidth example */
#include <graphics.h>
 
int main(void)
{
   int w_left, w_right;
   int width; // Total width of w_left;
 
   // Make two windows, side by side */
   w_left = initwindow(300, 200);
   width = getwindowwidth( );
   w_right = initwindow(300, 200, width, 0);
 
   /* clean up */
   getch();
   closegraph();
   return 0;
}

getmaxx getwindowheight getx

  no output of example at the moment
  do not hesitate and add it...