How to play system sounds in C#

.NET Framework allows playing system sounds using a simple code:

SystemSounds.[Type].Play(); 
But the SystemSounds class supports only 5 types of sound notifications: Asterisk, Beep, Exclamation, Hand, Question.

There is no easy way to play other standard sounds like LowBatteryAlarm, DeviceConnect, DeviceDisconnect, MailBeep, and others from the Windows Sound Scheme.

We in BgRnD are using following function in our C# projects:

public void PlaySystemSound(string RegistryName)
{
    string fileName = "";

    RegistryKey key = Registry.CurrentUser.OpenSubKey(String.Format(@"AppEvents\Schemes\Apps\.Default\{0}\.Current", RegistryName), false);
    try
    {
        fileName = (string)key.GetValue("", fileName);
    }
    finally
    {
        key.Close();
    }

    if (!File.Exists(fileName)) return;

    SoundPlayer player = new SoundPlayer(fileName);
    try
    {
        player.Play();
    }
    finally
    {
        player.Dispose();
    }
}

The function plays the sound resource specified by the RegistryName parameter. The set of possible names you can find in the System Registry at HKEY_CURRENT_USER\AppEvents\Schemes\Apps\.Default path.

Windows Sounds in the System Registry
Screenshot of Registry Editor to understand where to take Registry Names of system sounds.

You can freely use (copy and paste) this function into any of your projects.

If you still have any programming questions about playing the Windows sound notifications, feel free to ask.

Great tool to generate WMI queries

If you are planning to work with System.Management Namespace in the .NET framework, especially with ManagementObjectSearcher, ManagementObjectCollection, and ManagementObject classes, to perform different Windows Management Instrumentation (WMI) queries, take a look on WMI Code Creator tool by Microsoft.

Without this free utility, you'll spending lots of time to test your WMI queries via console or other debugging methodology.

Using the WMI Query Builder you can browse WMI namespaces, execute methods and receive WMI events. Also you can automatically generate a working source code to perform WMI queries, either C# or Visual Basic.

Moreover, you can modify and run these management scripts by pressing a single button! Visual Studio is not required for that 🙂

Hack to Extend the Website content

In this article you'll find some useful web-mastering tips and tricks. You can use this technique to make own web-site template engine or to extend the website functionality without ruining the old code as it was discussed in the previous article.

Define the new content as a variable. The previous and the next decorators could be dynamic arrays:

$sidebar_before[] = '<h2>Sidebar</h2>';
$sidebar_before[] = 'print_adsense';
$sidebar = <<<END
<p>
Some aside content here...
</p>
END;
$sidebar_after[] = 'block-links.inc';
$sidebar_after[] = '<h3>Advertisement<h3>';
$sidebar_after[] = 'print_adsense';

To call custom functions, include files or just print some html code before and after the main content, the PHP code in your website template should be something like this:

if (isset($sidebar_visible) && $sidebar_visible) {

	echo "\t\t\t<!-- Sidebar -->\n";
	echo "\t\t\t<div id=\"sidebar\" class="$css_class">\n\n";
	
	// Print content before the Sidebar
	if (isset($sidebar_before))
		foreach ($sidebar_before as $s) {
			if (function_exists($s)) call_user_func($s); 
			elseif (is_file($s)) include($s);
			else echo $s;
			echo "\n\n";
		}	

	// Print the Sidebar
	if (isset($sidebar)) echo $sidebar."\n\n";
	
	// Print content after the Sidebar
	if (isset($sidebar_after))
		foreach ($sidebar_after as $s) {
			if (function_exists($s)) call_user_func($s); 
			elseif (is_file($s)) include($s);
			else echo $s;
			echo "\n\n";
		}	
	
	echo "\t\t\t</div>\n";
	echo "\t\t\t<!-- /Sidebar -->\n\n";
} 

If you have any questions relative this article or know some other useful web-master hacks write a comment or contact our team directly.

Print any PHP variable easily

PHP developers often need to print value of different variables directly to the HTML code. But very often PHP variable is out of the current scope, so the echo(); function doesn't help. This PHP function prints any global (or external scope) variable by its name:

function print_var($var = 'domain', $url = '')
{
  global $$var, $$$var;
  if ($url != '')
    echo("<a href=\"$url\">${$var}</a>");
  else
    echo(${$var});
}

If you pass some URL as a second parameter you'll get a clickable link:

<?php print_var('page') ?>
<?php print_var('domain', '/') ?>
<?php print_var('software', '/download/') ?>
<?php print_var('site', 'http://www.site.com') ?>

We hope this PHP hack will be useful for everybody 🙂

States List for USA and Canada

Same to the countries list we are publishing the list of USA and Canadian states.

States list

Hint: Click on list, press Ctrl+A to select all, Ctrl+C to copy the list.

ISO 3166 Country Names

Every time programmers create the user panel in some program or website they have to search for a list of countries for dropdown or listview control. It is annoying...

So we've decided to palace such list in a public place. This is ISO 3166 Country Name list. You can freely use it in own projects.

Country Names

Hint: Click on list, press Ctrl+A to select all, Ctrl+C to copy the list.