// try to open a file for reading.
// The file will certainly not
// exist because there are too many explicit
// directories in the name.
// if the call to Open() fails, ex will be
// initialized with exception
// information. the call to ex.GetErrorMessage()
// will retrieve an appropriate message describing
// the error, and we'll add our own text
// to make sure the user is perfectly sure what
// went wrong.
if (!fileInput.Open("\\Too\\Many\\Bad\\Dirs.DAT", CFile::modeRead, &ex))
{
TCHAR szCause[255];
CString strFormatted;
ex.GetErrorMessage(szCause, 255);
// (in real life, it's probably more
// appropriate to read this from
// a string resource so it would be easy to
// localize)
strFormatted = _T("The data file could not be opened because of this error: ");
strFormatted += szCause;
AfxMessageBox(strFormatted);
else
{
// the file was opened, so do whatever work
// with fileInput
// we were planning...
// :