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standard Picklist selection with call a controller method

Hi I want to display a picklist on VFpage and call a contrpoller method to refresh part of the VF page.
Suppose Lead.Status selection I wanted to call a controller extension
How can I do that?

Please send me some code to acheive this.

YOu can use the apex:selectList and apex:selectOptions to acheive the stated requirement where you can select an option from a drop down and pass the selected value to a method in a controller :

the below link has sample code snippet which will give you an idea as to how to begin with :
public pagereference refreshData() {
   //code to load data

     return null;
on VF Page I am writing

<!-- apex:pageBlockSection >
                <apex:inputField value="{!Lead.Status}" id="vehstate">
                 <apex:actionSupport event="onchange"  action="{!refreshData}"  rerender="myopties"/>

This does not work I get the dropdown but it does not help