C++ Windows Data Types

Windows Data Types

Data Type Ranges

C# Get My Public IP Address using ifconfig.me

using System;
using System.IO;
using System.Net;

private string createRequest(string url, string method)
{
    var request = (HttpWebRequest)WebRequest.Create(url);
    request.UserAgent = "curl";
    request.Method = method;

    using (WebResponse response = request.GetResponse())
    {
        using (var reader = new StreamReader(response.GetResponseStream()))
        {
            return (reader.ReadToEnd());
        }
    }
}

 string myIP = createRequest("http://ifconfig.me", "GET").Replace("\n", "");

C# Put Dispaly in Sleep Mode

[System.Runtime.InteropServices.DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);


//OFF
SendMessage(this.Handle, 0x0112, (IntPtr)0xF170, (IntPtr)2);

//ON
 SendMessage(this.Handle, 0x0112, (IntPtr)0xF170, (IntPtr)(-1));

VC++ Ignore CTRL-C and Ctrl-Break Signal

More at MSDN-Example 

MSDN-Function

#include <windows.h> 
#include <stdio.h> 
 
BOOL CtrlHandler( DWORD fdwCtrlType ) 
{ 
  switch( fdwCtrlType ) 
  { 
    // Handle the CTRL-C signal. 
    case CTRL_C_EVENT: 
      printf( "Ctrl-C event\n\n" );
      Beep( 750, 300 ); 
      return( TRUE );
 
    // CTRL-CLOSE: confirm that the user wants to exit. 
    case CTRL_CLOSE_EVENT: 
      Beep( 600, 200 ); 
      printf( "Ctrl-Close event\n\n" );
      return( TRUE ); 
 
    // Pass other signals to the next handler. 
    case CTRL_BREAK_EVENT: 
      Beep( 900, 200 ); 
      printf( "Ctrl-Break event\n\n" );
      return TRUE; 
 
    case CTRL_LOGOFF_EVENT: 
      Beep( 1000, 200 ); 
      printf( "Ctrl-Logoff event\n\n" );
      return FALSE; 
 
    case CTRL_SHUTDOWN_EVENT: 
      Beep( 750, 500 ); 
      printf( "Ctrl-Shutdown event\n\n" );
      return FALSE; 
 
    default: 
      return FALSE; 
  } 
} 
 
int main( void ) 
{ 
  if( SetConsoleCtrlHandler( (PHANDLER_ROUTINE) CtrlHandler, TRUE ) ) 
  { 
    printf( "\nThe Control Handler is installed.\n" ); 
    printf( "\n -- Now try pressing Ctrl+C or Ctrl+Break, or" ); 
    printf( "\n    try logging off or closing the console...\n" ); 
    printf( "\n(...waiting in a loop for events...)\n\n" ); 
 
    while( 1 ){ } 
  } 
  else 
  {
    printf( "\nERROR: Could not set control handler"); 
    return 1;
  }
return 0;
}

VC++ Receive a stream of text from a system(Command) process

more at MSDN 

// crt_popen.c
/ This program uses _popen and _pclose to receive a 
// stream of text from a system process.
//

#include <stdio.h>
#include <stdlib.h>

int main( void )
{

   char   psBuffer[128];
   FILE   *pPipe;

        /* Run DIR so that it writes its output to a pipe. Open this
         * pipe with read text attribute so that we can read it 
         * like a text file. 
         */

   if( (pPipe = _popen( "dir *.c /on /p", "rt" )) == NULL )
      exit( 1 );

   /* Read pipe until end of file, or an error occurs. */

   while(fgets(psBuffer, 128, pPipe))
   {
      printf(psBuffer);
   }


   /* Close pipe and print return value of pPipe. */
   if (feof( pPipe))
   {
     printf( "\nProcess returned %d\n", _pclose( pPipe ) );
   }
   else
   {
     printf( "Error: Failed to read the pipe to the end.\n");
   }
}

VC++ Clearing the Screen

more at MSDN 

#include <windows.h>

void cls( HANDLE hConsole )
{
   COORD coordScreen = { 0, 0 };    // home for the cursor 
   DWORD cCharsWritten;
   CONSOLE_SCREEN_BUFFER_INFO csbi; 
   DWORD dwConSize;

// Get the number of character cells in the current buffer. 

   if( !GetConsoleScreenBufferInfo( hConsole, &csbi ))
   {
      return;
   }

   dwConSize = csbi.dwSize.X * csbi.dwSize.Y;

   // Fill the entire screen with blanks.

   if( !FillConsoleOutputCharacter( hConsole,        // Handle to console screen buffer 
                                    (TCHAR) ' ',     // Character to write to the buffer
                                    dwConSize,       // Number of cells to write 
                                    coordScreen,     // Coordinates of first cell 
                                    &cCharsWritten ))// Receive number of characters written
   {
      return;
   }

   // Get the current text attribute.

   if( !GetConsoleScreenBufferInfo( hConsole, &csbi ))
   {
      return;
   }

   // Set the buffer's attributes accordingly.

   if( !FillConsoleOutputAttribute( hConsole,         // Handle to console screen buffer 
                                    csbi.wAttributes, // Character attributes to use
                                    dwConSize,        // Number of cells to set attribute 
                                    coordScreen,      // Coordinates of first cell 
                                    &cCharsWritten )) // Receive number of characters written
   {
      return;
   }

   // Put the cursor at its home coordinates.

   SetConsoleCursorPosition( hConsole, coordScreen );
}

int main( void )
{
    HANDLE hStdout;

    hStdout = GetStdHandle(STD_OUTPUT_HANDLE);

    cls(hStdout);
    
    return 0;
}

VC++ Important pre-define pre-processor

_UNICODE
Is unicode set or not set

_DEBUG
Is configuration set to debug or release