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Q. How do I filter characters in a CEdit?

A. Create a CEdit derivative (CMyEdit) and create an OnChar() message map entry.

   // Assume that CMyEdit is derived from the CEdit class.

   afx_msg void CMyEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
   {
      if (nChar == 'a' || nChar == 'A')
      {
          nChar = 'X';
      }
      DefWindowProc(WM_CHAR, nChar, MAKELONG(nRepCnt, nFlags));
   }

--Source Unknown

This tip is provided for instructional purposes, and is released to the public domain. No claim of ownership is made. Use it at your own risk. No warranties are expressed or implied. The resulting program may not be fully functional. No animals were harmed in the making of this tip.

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