C / C++ / MFC

   // set a marker character using one of the invalid chars 
   // (we'll use it later)
   char cMarker = '|';
   // here's all our invalid characters in one place (except our marker char
   CString sBadChars = "\\/:*?\"<>";
   //here's our filename (contains invalid chars)
   CString sMyFileName = "a/b:c,1<2>3.xvy";

   // get the length of our filename string
   int nLen = sMyFileName.GetLength();
   char cCurr;
   // whip it till it bleeds
   for (int i = 0; i < nLen; i++)
   {
      // get the first/next char in the string
      cCurr = sMyFileName.GetAt(i);
      // see if it's a bad char
      if (sBadChars.Find(cCurr) > -1)
      {
         replace it with our marker char
         sMyFileName.Replace(i, cMarker);
      }
   }
   // now remove all the marker chars in the filename string
   sMyFileName.Remove(cMarker);
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To hell with those thin-skinned pillow-biters. - Me, 10/03/2001