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