Adding Text and Value to ComboBox
ComboBox text and value - C# , VB.Net
The following program demonstrates how to add Text and Value to an Item of a ComboBox without using any Binding DataSource.

In order to add Text and Value, here using a Dictionary Object to store text and values.
C#
VB.Net
How To Add (Item and Value) Into ComboBox
After adding items to the Dictionary, next step is to set this Dictionary Object as a DataSource in the Combobox
C#
VB.Net
How to add Text and Value in combobox
Now the first part is over, next is to retrieve these keys and values from the Combobox.
C#
VB.Net
Source Code | C#
Source Code | Vb.Net
Autocomplete ComboBox

From the version Visual Studio 2005, some of the controls support Autocomplete feature including the ComboBox controls. From the following link you can see how to make .... Autocomplete ComboBox
ComboBox Control

A ComboBox displays a text box combined with a ListBox, which enables the user to select items from the list or enter a new value. You can learn more operations in ComboBox from the following link
C# ComboBox VB.Net ComboBoxNEXT.....sort array