TiModeComboBox.OnBeforeUserChange
TiModeComboBox
Allows for control over whether the Value property is changed and what value it is set to, but only when the Value is
changed by the user.
type TOnBeforeUserChangeDouble = procedure(Sender : TObject; OldValue : Integer; var NewValue : Integer; var CanChange : Boolean) of object;
property OnBeforeUserChange : TOnBeforeUserChange;
Description
Use OnBeforeChange to control whether the Value property can change, but only when the Value is changed by the user. If the Value property is changed through code, then this event will not fire. The event
passes the OldValue and NewValue for inspection. Set CanChange to TRUE to allow
the Value property to change. You can also modify the value that the Value property is set to by changing the NewValue property.
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