write rapid data

At the click of a button, i would like to write the index of a combobox in a variable “NoProd” in the controller ???

Here is the code but it<s not finish…

private void btnProduction_click(object sender, EventArgs e)

{

int selectedIndex = cbxChoix.SelectedIndex;

Object selectedItem = cbxChoix.SelectedItem;

MessageBox.Show("Selected Item Text: " + selectedItem.ToString() + " " +

"Index: " + selectedIndex.ToString());

RapidData rd = aController.Rapid.GetRapidData(“T_ROB1”, “MainModule”, “NoProd”);

??? like rd.value = selectedIndex; but it doesn’t work.

}