This is a small C++ .net program that demonstrates simple 2D collision (very simple) and demonstrates the dbPrint function as well as some other simple db functions via the darkSDK

                                    ` This code was downloaded from The Game Creators
                                    ` It is reproduced here with full permission
                                    ` http://www.thegamecreators.com
                                    
                                    #include "iostream"
#include "stdio.h"
#include "string"
#include "DarkSDK.h" 

using namespace std;

class sphere_dude 
{
public:
	
    int X, Y;
    char drawCursor;
    const static int R = 10;

    const static int iUpperXLimit = 400;
    const static int iLowerXLimit = 10;
    const static int iUpperYLimit = 400;
    const static int iLowerYLimit = 10;

    
    // Create a string to hold coords that will be printed to the screen.
    string X_string;
	 

    sphere_dude ()
    {
	// dummy constructor
    }

    void setStartingPoint (int XAdj, int YAdj)
    {
	Y = YAdj;
	X = XAdj;
	this->draw(X, Y);
    }
    void moveRight (int XAdj)
    {
	X = X + XAdj;
	this->draw(X, Y);
    }
    void moveLeft (int XAdj)
    {
	X = X - XAdj;
	this->draw(X, Y);
    }

    void moveDown (int YAdj)
    {
	Y = Y + YAdj;
	this->draw(X, Y);
    }
    void moveUp (int YAdj)
    {
	Y = Y - YAdj;
	this->draw(X, Y);
    }

    void draw (int X, int Y)
    {
        this->collisionCheck();
        dbCircle (X, Y, R);
    }

    void drawLastKnown ()
    {
        dbCircle (X, Y, R);
    }

    void collisionCheck ()
    {
        if ((X - R) <= iLowerXLimit)
	{
	    drawCursor = 'R';
	    X = iLowerXLimit + R;
	}
	if ((X + R) >= iUpperXLimit)
	{
     	    drawCursor = 'L';
	    X = iUpperXLimit - R;
	}
	if ((Y - R) <= iLowerYLimit)
	{
	    drawCursor = 'B';
	    Y = iLowerYLimit + R;
	}
	if ((Y + R) >= iUpperYLimit)
	{
   	    drawCursor = 'T';
	    Y = iUpperYLimit - R;
	}
    }

    void returnPos (void)
    {
    	X_string.append ( "X: " );
	X_string.append ( dbStr(X) );
	X_string.append ( " | Y: " );
	X_string.append ( dbStr(Y) );

	//dbPrint ( iX_string  );
	switch (drawCursor)
	{
	    case 'T':
                dbSetCursor (X - (R * 6), (Y - (R * 5)));
		break;
	    case 'B':
                dbSetCursor (X - (R * 6), (Y + (R * 5)));
		break;
	    case 'R':
                dbSetCursor (X + (R * 6), Y - (R * 5));
		break;
	    case 'L':
                dbSetCursor (X - (R * 6), Y - (R * 5));
		break;
	    default:
                dbSetCursor (X - (R * 6), (Y - R * 5));
		break;
	}



	dbPrint ( const_cast<char*>(X_string.c_str()) );
	X_string = " ";
    }

};

void DarkSDK ( void )
{

    
    // define and initialize the counter and switches
    int iCounter, iX_reverse, iY_reverse, iLeft, iUp, iRandom;
    iCounter = 0;
    iX_reverse = 0;
    iY_reverse = 0;
    iLeft = 0;
    iUp = 0;
    iRandom = 0;

    // Define our object sphereDude of type sphere_dude
    sphere_dude sphereDude;


    // define and initialize the coord variables and set movement speed.
    int iXSpeed, iYSpeed, iUpperXLimit, iLowerXLimit, iUpperYLimit, iLowerYLimit;
    int iX, iY;

    iXSpeed = 5;
    iYSpeed = 5;

    sphereDude.setStartingPoint (200, 200);

    // Create a string to hold coords and initialize cursor.
    string iX_string; 
    dbSetCursor (50, 50);

    // set sync on and sync rate to 60 frames per second
    dbSyncOn   ( );
    dbSyncRate ( 60 );

    // loop until the escape key is pressed
    while ( !dbEscapeKey ( ) )
    {
	if (dbUpKey()==1)
	{
	    sphereDude.moveUp(iXSpeed);
	}
	else
	{
 	    if (dbDownKey()==1)
	    {
	        sphereDude.moveDown(iXSpeed);
	    }
	    else
	    {
	        if (dbRightKey()==1)
		{
		    sphereDude.moveRight(iYSpeed);
		}
		else
		{
		    if (dbLeftKey()==1)
		    {
		        sphereDude.moveLeft(iYSpeed);
		    }
		    else
		    {
		        sphereDude.drawLastKnown();
		    }
		}
	    }
	}
        sphereDude.returnPos();
        
        //iX_string = sphereDude.returnPos();
        

        iCounter = 0;
	dbSync ( );
	dbCLS();
    }
}