ComboBoxImages
-----------------------------------------------------------------------------
Shows how easy is to use images from ImageList in the drop down items of 
a C1ComboBox control.

Design time:
1. Add items to C1ComboBox.Items collection
2. Add images to the imageList1
3. Set keys (Name) of the images equal to the items in C1ComboBox.Items

Run time:
c1ComboBox.ItemsImageList = imageList;
imageList.Images.Add("First item", Image.FromFile("First.png"));
c1ComboBox.Items.Add("First item");