SingleLineEdit, MultiLineEdit, EditMask, ListView, TreeView controls
If the HideSelection property is enabled, selected text does not stay selected (highlighted) when the control does not have focus. If this property is not enabled, selected text stays highlighted when the control loses focus.
Select the Hide Selection check box on the General page of the control’s Properties view.
The HideSelection property takes a boolean value. The following example specifies that selected text in a SingleLineEdit is always highlighted.
sle_1.HideSelection = FALSE
To enable HideSelection: