Hi Terry,
Thanks for your interest in Syncfusion product.
If you want to know the selected Index of the comboboxAdv control when you close the form then you can use SelectedIndex property of comboBoxAdv control. You can handle the From Closing event. Please refer to the following code snippet
private void newToolStripMenuItem_Click(object sender, EventArgs e)
{
Form2 form2 = new Form2();
form2.ShowDialog();
}
private void Form2_FormClosing(object sender, FormClosingEventArgs e)
{
Console.WriteLine(this.comboBoxAdv1.SelectedIndex.ToString());
}
I have attached the sample for your reference. You can download the sample from the following page.
http://websamples.syncfusion.com/samples/Tools.Windows/F65911/main.htmPlease refer to the sample and let me know if you have any questions.
Thanks,
Nagaraj