#include "graphics.h"
bool ismouseclick(int kind);
 

The ismouseclick function is available in the winbgim implementation of
BGI graphics. This function returns true if there is an unprocessed mouse
event of the specified kind. The argument to ismouseclick is one of these
constants from the graphics.h file:
  WM_MOUSEMOVE
if you want to detect a mouse movement
  WM_LBUTTONDBLCLK
...detect when the left mouse button is double clicked
  WM_LBUTTONDOWN
...detect when the left mouse button is clicked down
  WM_LBUTTONUP
...detect when the left mouse button is released up
  WM_MBUTTONDBLCLK
...detect when the middle mouse button is double clicked
  WM_MBUTTONDOWN
...detect when the middle mouse button is clicked down
  WM_MBUTTONUP
...detect when the middle mouse button is released up
  WM_RBUTTONDBLCLK
...detect when the right mouse button is double clicked
  WM_RBUTTONDOWN
...detect when the right mouse button is clicked down
  WM_RBUTTONUP
...detect when the right mouse button is released up
The middle mouse button handlers aren't working on my machine. I haven't
yet tracked down the reason--it could be a broken mouse or it could be a
bug in my programming.
A mouse event can be processed by calling getmouseclick (which gets the
coordinates of the event), or by calling clearmouseclick (which processes
the event without providing its coordinates).

/* mouse example */
#include "graphics.h"
 
void main(void)
{
    int maxx, maxy;  // Maximum x and y pixel coordinates
    int x, y;  // Coordinates of the mouse click
    int divisor;     // Divisor for the length of a triangle side
 
    // Put the machine into graphics mode and get the maximum
coordinates:
    initwindow(450, 300);
    maxx = getmaxx( );
    maxy = getmaxy( );
 
    // Draw a white circle with red inside and a radius of 50 pixels:
    setfillstyle(SOLID_FILL, RED);
    setcolor(WHITE);
    fillellipse(maxx/2, maxy/2, 50, 50);
 
    // Print a message and wait for a red pixel to be double clicked:
    settextstyle(DEFAULT_FONT, HORIZ_DIR, 2);
    outtextxy(20, 20, "Left click in to end.");
    setcolor(BLUE);
    divisor = 2;
    while (!ismouseclick(WM_LBUTTONDOWN))
    {
  triangle(maxx/divisor, maxy/divisor);
  delay(500);
  divisor++;
    }
 
    getmouseclick(WM_LBUTTONDOWN, x, y);
    cout << "The mouse was clicked at: ";
    cout << "x=" << x;
    cout << " y=" << y << endl;
 
    // Switch back to text mode:
    closegraph( );
}

getmouseclick clearmouseclick

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