C# Prank Program: Making use of PC Speaker and CD ROM Drive

jesh — Wed, 07 Jan 2009 06:42:11 +0000

I created this prank program (just for fun) and also at the same time, learn controlling hardware devices, through C#.NET. This program is quite simple; as soon as the program starts, your disc tray ejects and closes and the PC speaker beeps for a second, and this entire routine is executed endlessly. Of course, it ends if the application closes/exits.

For this program, you will need to import the following:

    using System.Runtime.InteropServices;
    using System.Text;

Next, insert this block of code inside your C# class and outside any method:

[DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi)]
protected static extern int mciSendString(string lpstrCommand, StringBuilder lpstrReturnString, int uReturnLength, IntPtr hwndCallback);

[DllImport("KERNEL32.DLL", EntryPoint = "Beep")]
public static extern bool Beep(int tone, int length);

Lastly, key in this code in your Main() or any method that you wish to call to trigger the opening and closing of cd tray and beeping of the speaker:

while (true)
{
    int ret = mciSendString("set cdaudio door open", null, 0, IntPtr.Zero);
    Beep(1000, 1000);
    ret = mciSendString("set cdaudio door closed", null, 0, IntPtr.Zero);
    Beep(1000, 1000);
}

There you have it. Basically, the important part of this program is when you make the CD ROM drive open and close and the PC Speaker beep. You can use this minor code block in the second and last blockquotes to any program that you wish to make. I just made this tutorial fun and enjoying. Learning is best when it is fun. :)

A Simple Checklist Guide in Web and Application Development

The World of “Hello World”.

jesh — Fri, 07 Dec 2007 04:26:00 +0000

They say that conquering the world of the “Hello World” problem brings you to the edge of learning new programming languages. A-B-C steps of learning programming languages always starts with the question “How do i produce an output?” Most programming tutorials always start with the simple exercise of producing the “Hello World” output. In this entry, I am to teach and share to you how to output the most basic “Hello World” string in some of the commonly used applications for console and for web.

JAVA:

import java.io.*;
public class MyProgram{
     public static void main(String[] args) throws IOException{
          System.out.println(“Hello World!”);
     }
}

C#:

using System ;
class MyProgram{
     public static void main(String[] args){
          Console.Write(“Hello World!”);
     }
}

#include
int main (){
printf(“Hello World!”);

return 0;
}

C++:

#include
using namespace std;
int main (){
cout<<”Hello World!”<

return 0;
}

VB:

Imports System
Public Sub Main ()
Console.WriteLine(“Hello World!”)
End Sub

JSP/ASP:

          My WebPage


          <%= Hello World! %>

PHP:

          My WebPage