Mood:  mischievious

Ever wondered how to implement getch and getche in Windows console application...

Here is how we do this...

int getch()
{
    HANDLE hStdIn = GetStdHandle(STD_INPUT_HANDLE);
    if( hStdIn == INVALID_HANDLE_VALUE )
    {
        return 0;
    }// End if

    DWORD dwInputMode = 0;
    GetConsoleMode( hStdIn, &dwInputMode );

    // Code that disables line input and echoing of entered character
    SetConsoleMode( hStdIn, dwInputMode & ~ENABLE_LINE_INPUT &
                                          ~ENABLE_ECHO_INPUT );

    char cBuff = 0;
    DWORD dwBytesRead = 0;
    if( !ReadFile( hStdIn, &cBuff, sizeof( cBuff ), &dwBytesRead, 0 ))
    {
        return 0;
    }

    // Return to previous settings
    SetConsoleMode( hStdIn, dwInputMode );

    return cBuff;
}// End getch

int getche()
{
    HANDLE hStdOut = GetStdHandle( STD_OUTPUT_HANDLE );
    if( hStdOut != INVALID_HANDLE_VALUE )
    {
        char cGetCh = getch();
        DWORD dwBytesWritten = 0;
        WriteFile( hStdOut, &cGetCh, sizeof( cGetCh ), &dwBytesWritten, NULL );
       
        return cGetCh;
    }// End if
   
    return 0;
}// End getche

Posted by Nibu babu thomas at 1:38 PM

Updated: Tuesday, 13 February 2007 2:10 PM

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