ErrorMsg: String;
The ErrorMsg property returns the error information message. If there is no error, it returns "No error".
Sub UserProc;
Var
a: Double;
Result: String;
Begin
a := Math.Sqrt(-10);
Result := Math.ErrorMsg;
End Sub UserProc;
As a result the Result variable will contain an error information message: "The parameter value must be >=0".
See also: