Beep, MessageBeep

Here is three very simple methods to Beep.

• Most simple way.

  Console.WriteLine("\a");

• Second one is WinAPI MessageBeep function using PInvoke.

  using System;
  using System.Runtime.InteropServices;
  
  public class _Main
  {
      #region Win32
      [DllImport("user32.dll")]
      static extern void MessageBeep(uint uType); 
      
      const uint MB_OK                = 0x00000000;
      
      const uint MB_ICONHAND          = 0x00000010;
      const uint MB_ICONQUESTION      = 0x00000020;
      const uint MB_ICONEXCLAMATION   = 0x00000030;
      const uint MB_ICONASTERISK      = 0x00000040;
      
      #endregion
  
      public static void Main()
      {
          MessageBeep(MB_ICONEXCLAMATION);
      }
  }
  

• Third is PInvoke too. This is WinAPI Beep function.

  using System;
  using System.Runtime.InteropServices;
  
  public class _Main
  {
      #region Win32
      
      [DllImport("Kernel32.dll")]
      static extern bool Beep(
          uint dwFreq, uint dwDuration
      );
      
      #endregion
  
      public static void Main()
      {
          Beep(150, 150);
      }
  }
  

MSDN:

MessageBeep function

The MessageBeep function plays a waveform sound. The waveform sound for each sound type is identified by an entry in the registry.

Parameters

uType:Sound type, as identified by an entry in the registry.

Beep function

The Beep function generates simple tones on the speaker. The function is synchronous; it does not return control to its caller until the sound finishes.

Parameters

dwFreq:Frequency of the sound, in hertz. This parameter must be in the range 37 through 32,767 (0x25 through 0x7FFF). dwDuration:Duration of the sound, in milliseconds.

Return Values:

If the function succeeds, the return value is true. If the function fails, the return value is false.