TExprBuiltInManager.AddFunction

public function TExprBuiltInManager.AddFunction(

  const ACategory: TBuiltInCategory;

  const AName: ShortString;

  const AResultType: Char;

  const AParamTypes: string;

  ACallBack: TFPExprFunctionCallBack

):TFPBuiltInExprIdentifierDef;

function TExprBuiltInManager.AddFunction(

  const ACategory: TBuiltInCategory;

  const AName: ShortString;

  const AResultType: Char;

  const AParamTypes: string;

  ACallBack: TFPExprFunctionEvent

):TFPBuiltInExprIdentifierDef;

function TExprBuiltInManager.AddFunction(

  const ACategory: TBuiltInCategory;

  const AName: ShortString;

  const AResultType: Char;

  const AParamTypes: string;

  ANodeClass: TFPExprFunctionClass

):TFPBuiltInExprIdentifierDef;