About using System.NoErrMsg

Question

I am studying about System.NoErrMsg in C++ Builder XE4.

From the documents, I infer that by setting NoErrMsg true, I will not see the error MessageBox.

Following is my sample code.

void __fastcall TForm1::Button1Click(TObject *Sender)
{
    NoErrMsg = true; // System.NoErrMsg

    StrToInt(" "); // make the error purposely
}

However, still the above code shows the Error MessageBox when I click Button1.

Is my understanding of NoErrMsg incorrect?

How is it normally used?

Answer 1

NoErrMsg applies to runtime errors, such as I/O errors and OS errors. StrToInt() raises an exception instead. Not the same thing, and NoErrMsg does not apply to uncaught exceptions.