To develop single-user and multiuser applications by using the MSN® Messenger Activity object model, you should be familiar with:
- The MSN Messenger client.
- How to manipulate dynamic HTML (DHTML) using a scripting language such as Microsoft® JScript®.
- An event-driven programming language such as Microsoft Visual Basic®.
You can start with a new or existing HTML page. Your HTML page will be displayed within the MSN Messenger client. The largest window that the MSN Messenger client can display is 500 × 500 pixels, so you should design your Launch Site application accordingly. Event handlers and functions are placed in the scripting part of the document, as shown in the following example. Output and information are displayed in the body part of the document. If you have an existing application or game that uses DHTML, you may be able to make it into a MSN Messenger Activity by adding some additional scripting.
<HTML> <HEAD> <!-- Script area --> </HEAD> <BODY> <!-- Display area --> </BODY> </HTML>