How to Create a Visualforce page

* Salesforce application is easy to develop

* You can register a 30 day free development environment & start developing your first helloworld application
      http://developer.force.com/

* First enable the Development mode
     i) Click Setup
     ii) From Personal Setup ->
                  Click My Personal Information -> Personal Information
                 
                  Enable the "Development Mode" checkbox

* You can create the visualforce page by entering the url as the following  (by appending /apex/helloword to the salesforce url).
              https://na12.salesforce.com/apex/helloword

* Since this page is not exists, system will display the message to create the page

* Click the click to create the page

* The helloworld page will be created and the visual force code will be displayed in the programming pane.

You can modify the code as the following and the see the result.   It's so simple.

<apex:page>
    <h1> My first Hello World Program </h1>
<apex:page>