Report > Report Assembly Interfaces > IPrxReportUserEvents > IPrxReportUserEvents.EventOnBeforeDeleteControl
EventOnBeforeDeleteControl(Args: IUiPrxControlCancelEventArgs);
Args. The parameter that enables the user to work with event parameters.
The EventOnBeforeDeleteControl method implements the event that occurs before deleting a control.
Executing the example requires a regular report that contains a control. Connect a unit to the regular report, select the connected unit an the Parent class as an event handler.
Add links to the Report, Ui system assemblies.
Public Class EventsClass: Parent
Public Sub OnBeforeDeleteControl(Control: IPrxControl; Var Cancel: Boolean);
Begin
//Call system event redetermined in the Parent class
Inherited OnBeforeDeleteControl(Control, Cancel);
End Sub OnBeforeDeleteControl;
End Class EventsClass;
Class Parent: ReportEvents
// Work with controls:
Sub EventOnBeforeDeleteControl(Args: IUiPrxControlCancelEventArgs);
Begin
WinApplication.InformationBox("Control will be deleted")
End Sub EventOnBeforeDeleteControl;
End Class Parent;
After executing the example, before control value changes, the information message is displayed in the regular report.
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