If you are interested in the details see the two sections of the method TCustomComboBox. The Delphi IDE uses this component for the Search option of the Tools Palette, as you can see below:ġ18 The internal code used to set up the text hint for a combo box in Windows XP and Windows Vista is different, but the VCL manages this for you. For example, you can add a Cancel button that empties the edit box, and a search or lookup button that validates the input or looks for some related information. This is basically an edit box that can have small buttons on the left or right side, used to interact with the edit box itself. A brand new control that extends the behavior of the Edit control is the ButtonedEdit component, which is a custom VCL control defined in the ExtCtrls unit.
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