How to add our own logo to Dashboard

Normally WordPress Dashboard has a logo of "W" on the top left where your sites title is displayed. if you are running a multi author blog or any similar to that you can add your own logo their to give a good design.

First Make a logo of 30 x 31 px and upload it to your theme's image directory.

For Example :

/wp-content/themes/twentyten/images

if you are using Twenty Ten as your Theme

then just add the below line of code to your functions.php :

add_action('admin_head', 'my_custom_logo');

function my_custom_logo() {
   echo '
      <style type="text/css">
         #header-logo { background-image: url('.get_bloginfo('template_directory').'/images/custom-logo.gif) !important; }
      </style>
   ';
}

Now in the Above code just change the custom-logo.gif with the name of your logo