3. Beep Error Codes

• Most kernel32 API calls return result in EAX reqister.

• If Beep function succeeds, the return value is nonzero.

• If the function fails, the return value is zero. To get extended error information, application can call GetLastError API:

  
      // C example:
      DWORD result = Beep( frequency, ms );
      if ( result == 0 ) {
         DWORD error_code = GetLastError();
      }