Hey everybody

I am creating one application in which I am stuck at one point. I want to relate two combo boxes for example
let the first combo box be named "bxcourse"
n the second one is "bxlevel"

for bxcourse in want to select and list DISTINCT values from the database and based on the value selected from bxcourse in want to search from the database and then add the respective items in the bxlevel.

I m able to select and display the distinct values in bxcourse but I m not able to display the values in bxlevel based on the selected item from bxcourse.
Please help me out!!