ComboBox.HideDropDownButton Property (ExComboBox)

By default, the HideDropDownButton property is 0. Use the HideDropDownButton property to hide the control's drop down button when the control loses the focus. The property has effect only if the control's Style property is DropDown or DropDownList. The HideDropDownButton property has no effect if the control's Style property is Simple. Use the UseTabKey property to control who handles the TAB key, the control or the form/container that hosts the control. Use the DropDown method to programmatically drop down the control. Use the Background property to change the drop down button's visual appearance. Use the DropDownButtonWidth property to specify the width in pixels of the drop down button.

If the HideDropDownButton property is:

0 ( default ), the control shows always the drop down button
1, the control do not show the drop down button
-1, the control shows the drop down button when the control gain the focus, and hides the drop down button when the control loses the focus

		Type	Description
		Long	A long expression that indicates whether the control hides the drop down button. The valid values are: 0 ( default ) - the control shows alwyas the drop down button, -1 - the control hides the drop down button when control loses the focus. 1 - the control hides the drop down button.