Code:
///////////////////////////////
#include <acknex.h>
#include <default.c>
///////////////////////////////

int xx=20;//<-your int value inside structure

var yy;//<-temp var that will be displayed inside panel

PANEL* my_panel =
{
	pos_x = 100;
	pos_y = 50;

	digits(0,0,"%.0f",*,1,yy);//<-- seems to only take a variable 
	 
 	flags = SHOW | OUTLINE;
}

function main()
{
  vec_set(screen_size,vector(800,400,0));
  vec_set(screen_color,vector(50,1,1)); // dark blue
  vec_set(sky_color,vector(50,1,1)); // dark blue
  video_window(NULL,NULL,0,"My New Game");
  d3d_antialias = 1;
  shadow_stencil = 3;
  
  level_load("");
  vec_set(camera.x,vector(-250,0,50));
  vec_set(camera.pan,vector(0,-15,0));

	while(1)
	{
		xx+=1;
 		yy=(int)xx;//<-converted into var just for displaying purpose
 					  //but xx is stil int value 
 		wait(1);
	}

}


Only global var variables or global predefined STRING* pointers
can be displayed (no int, float, char, or other types of variables).
The var can be part of a global struct or of an array, but not of a multidimensional array.

Compulsive compiler