dcsimg

Win32 Console Application Tools



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Environment: VC6, SP5, WinXP; should also work on Win9x

I decided to make these routines public after looking for a long time to find them.

  • void clrscr();
  • void gotoxy(x,y);
  • void setrgb(color);

The code to accomplish this follows.

// console.cpp
//
#include "console.h"

using namespace std;

//
// Clears the screen
//
void clrscr()
{
  COORD coordScreen = { 0, 0 }; 
  DWORD cCharsWritten; 
  CONSOLE_SCREEN_BUFFER_INFO csbi; 
  DWORD dwConSize; 
  HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE); 
  
  GetConsoleScreenBufferInfo(hConsole, &csbi); 
  dwConSize = csbi.dwSize.X * csbi.dwSize.Y; 
  FillConsoleOutputCharacter(hConsole, TEXT(' '),
                             dwConSize, 
                             coordScreen,
                             &cCharsWritten); 
  GetConsoleScreenBufferInfo(hConsole, &csbi); 
  FillConsoleOutputAttribute(hConsole,
                             csbi.wAttributes,
                             dwConSize,
                             coordScreen,
                             &cCharsWritten); 
  SetConsoleCursorPosition(hConsole, coordScreen); 
}

//
// Moves the cursor to x, y in console window
// ie x=left\right y=top\bottom
//
void gotoxy(int x, int y)
{
  COORD point;
  point.X = x; point.Y = y;
  SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),
                           point);
}

//
// Set text and background colors
//
void setrgb(int color)
{
  switch (color)
  {
  case 0:    // White on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                        FOREGROUND_INTENSITY | FOREGROUND_RED |
                        FOREGROUND_GREEN | FOREGROUND_BLUE);
    break;
  case 1:    // Red on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                         FOREGROUND_INTENSITY | FOREGROUND_RED);
    break;
  case 2:    // Green on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                      FOREGROUND_INTENSITY | FOREGROUND_GREEN);
    break;
  case 3:    // Yellow on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                      FOREGROUND_INTENSITY | FOREGROUND_RED |
                      FOREGROUND_GREEN);
    break;
  case 4:    // Blue on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                      FOREGROUND_INTENSITY | FOREGROUND_BLUE);
    break;
  case 5:    // Magenta on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                     FOREGROUND_INTENSITY | FOREGROUND_RED |
                     FOREGROUND_BLUE);
    break;
  case 6:    // Cyan on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                    FOREGROUND_INTENSITY | FOREGROUND_GREEN |
                    FOREGROUND_BLUE);
    break;
  case 7:    // Black on Gray
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                  BACKGROUND_INTENSITY | BACKGROUND_INTENSITY);
    break;
  case 8:    // Black on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                  BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                  BACKGROUND_RED | BACKGROUND_GREEN |
                  BACKGROUND_BLUE);
    break;
  case 9:    // Red on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                  BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                  BACKGROUND_RED | BACKGROUND_GREEN |
                  BACKGROUND_BLUE |
      FOREGROUND_RED);
    break;
  case 10:    // Green on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                 BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                 BACKGROUND_RED | BACKGROUND_GREEN |
                 BACKGROUND_BLUE | FOREGROUND_GREEN);
    break;
  case 11:    // Yellow on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                 BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                 BACKGROUND_RED | BACKGROUND_GREEN |
                 BACKGROUND_BLUE | FOREGROUND_RED |
                 FOREGROUND_GREEN);
    break;
  case 12:    // Blue on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                 BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                 BACKGROUND_RED | BACKGROUND_GREEN |
                 BACKGROUND_BLUE | FOREGROUND_BLUE);
    break;
  case 13:    // Magenta on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                 BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                 BACKGROUND_RED | BACKGROUND_GREEN |
                 BACKGROUND_BLUE | FOREGROUND_RED |
                 FOREGROUND_BLUE);
    break;
  case 14:    // Cyan on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                 BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                 BACKGROUND_RED | BACKGROUND_GREEN |
                 BACKGROUND_BLUE | FOREGROUND_GREEN |
                 FOREGROUND_BLUE);
    break;
  case 15:    // White on White
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                BACKGROUND_INTENSITY | FOREGROUND_INTENSITY |
                BACKGROUND_RED | BACKGROUND_GREEN |
                BACKGROUND_BLUE | FOREGROUND_RED |
                FOREGROUND_GREEN | FOREGROUND_BLUE);
    break;
  default :    // White on Black
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
                FOREGROUND_INTENSITY | FOREGROUND_RED |
                FOREGROUND_GREEN | FOREGROUND_BLUE);
    break;
  }
}

Downloads

Download demo project - 110 Kb
Download source - 7 Kb


This article was originally published on May 23rd, 2002

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