Ajax type functionality in windows application

Hi,

Populating the combobox based on the text entered in the combobox .

I want to retrieve a column from the database and populate it to the combobox but the condition is that i have to enter the text in the combobox and with this as one of the parameters, it should retrieve the data.
I tried many ways but they were not satisfactory
I wanted to know which event of the combobox should be used to do this action. and how can i implement it..

Any help....

re: Ajax type functionality in windows application

Try the textchanged event? Or lostfocus, or watch and wait for the user to press "enter" ?