#include <graphics.h>
int getdisplaycolor( int color );
 

The getdisplaycolor function is available in the winbgim implementation
of BGI graphics. getdisplaycolor is used to get an color that the current
actual display device can display.

/* getdisplaycolor example */
 
#include <graphics.h>
#include <iostream>
using namespace std;
 
int main(void)
{
   int r, g, b; // Components of r, g and b for a color.
   int color_request, color_actual;
 
   /* initialize graphics window */
   initwindow(300, 300);
 
   /* Get a user-defined color */
   cout << "Please enter amounts of red, green and blue: ";
   cin >> r >> g >> b;
 
   /* Compute what this color will display as. */
   color_request = COLOR(r, g, b);
   color_actual = getdisplaycolor(color_request);
   if (IS_BGI_COLOR(color_actual))
   {
cout << "That will display as BGI color number " << color_actual <<
endl;
   }
   else
   {
 cout << "That color will display on this machine with components:
\n"
	    << "Red:   " << RED_VALUE(color_actual)   << '\n'
<< "Green: " << GREEN_VALUE(color_actual) << '\n'
<< "Blue:  " << BLUE_VALUE(color_actual)  << '\n';
   }
}

getpixel putpixel wincolor

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