I am a simple newbie at C++ but im eager to learn. I tried to use the sample code from a C++ book (windows game programming for dummies) and I compiled it on my Dev C++ compiler. After fixing some simple errors (usually spelling mistakes) I found 2 errors I can't figure out. Here are the errors:

[Warning] In function 'void Init_Graphics()";
'OL' undeclared (first use this function)
(Each undeclared identifier is reported only once for each)

And another error:

At global scope:
'main' must return 'int'
[Build Error] [main.o] Error 1

And here is the code:

Code:
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <conio.h>
#include <windows.h>
#include <time.h>
// DEFINES /////////////////
#define MAX_X   77     // Max X Pos for player
#define SCROLL_POS  24 // The point that scrolling occurs
// PROTOTYPES //////////////
void Init_Graphics(void);
inline void Set_Color(int fcolor, int bcolor);
inline void Draw_String(int x, int y, char *string);
// GLOBALS /////////////////
CONSOLE_SCREEN_BUFFER_INFO con_info; // Holds screen info
HANDLE hconsole;                     // Handle to Console
int game_running = 1;                // State of game 1=run 0=done
// FUNCTIONS ///////////////
void Init_Graphics(void)
{
    // This initializes the console graphics engine
    COORD console_size = {80,25}; // Size of Console
    // Seed the random number generator with time
    srand((unsigned)time(NULL));
    // Open i/o channel to console screen
    hconsole=CreateFile("CONOUT$",GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, OL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, OL);
    // Make sure we are in 80x25
    SetConsoleScreenBufferSize(hconsole,console_size);
    // Get details for console screen
    GetConsoleScreenBufferInfo(hconsole,&con_info);
} // end Init_Graphics
///////////////////////////
inline void Set_Color(int fcolor, int bcolor=0)
{
    // This function sets the color of the console output
    SetConsoleTextAttribute(hconsole,(WORD)((bcolor << 4) | fcolor));
} // End Set_Color
///////////////////////////
inline void Draw_String(int x, int y, char *string)
{
    // This function draws a string at the give x,y
    COORD cursor_pos; // used to pass coords
    // set printing position
    cursor_pos.X = x;
    cursor_pos.Y = y;
    SetConsoleCursorPosition(hconsole,cursor_pos);
    // Print the string in current color
    printf("%s",string);
} // End Draw_String
///////////////////////////
inline void Clear_Screen(void)
{
    // This function clears the screen
    // Set color to white on black
    Set_Color(15,0);
    // clear the screen
    for (int index=0; index<=25; index++)
        Draw_String(0, SCROLL_POS,"\n");
} // End Clear_Screen
// MAIN GAME LOOP /////////
void main(void)
{
    char key;              // Player input Data
    int player_x = 40;     // Players X position
    // SECTION: initialization
    // Set up the console text graphics system
    Init_Graphics();
    // Clear the screen
    Clear_Screen();
    // SECTION: main event loop, this is where all the action
    // takes place, (the general loop is erase-move-draw)
    while(game_running)
    {
        // SECTION: erase all objects or clear screen
        // nothing to erase in our case
        // SECTION: get player input
        if (kbhit())
        {
                // Get keyboard data, and filter it
                key = toupper(getch());
                // Check if player is trying to exit, if so, exit
                if (key=='Q' || key==27)
                                game_running=0;
                // Check if player is moving left
                if (key=='A')
                                player_x--;
                // Check if player is moving right
                if (key=='S')
                                player_x++;
        } // end if
        // SECTION: game logic and futhur processing
        // make sure player stays on screen
        if (++player_x > MAX_X)
                player_x=MAX_X;
        if (--player_x < 0)
                player_x=0;
        // SECTION: draw everything
        // draw next star at random position
        Set_Color(15,0);
        Draw_String(rand()%80, SCROLL_POS,".\n");
        // Draw Player
        Set_Color(rand()%15,0);
        Draw_String(player_x,0,"<-*->");
        Draw_String(0,0,"");
        // SECTION: synchronize to a constant frame rate
        Sleep(40);
    } // End while
// SECTION: shutdown and bail
Clear_Screen();
printf("\nG A M E O V E R \n\n");
} // End main
Yes, I know its a simple game, but you gotta start somewhere.