API Reference FMXLicenseButtonsSample Olf.FMX.AboutDialogForm TOlfAboutDialogForm TOlfAboutDialogForm.FonButtonBuyClickProc Field On this page Definition Definition Unit: Olf.FMX.AboutDialogForm Package: FMXLicenseButtonsSample Delphi Copy var FonButtonBuyClickProc: TNotifyEvent Value TNotifyEvent