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   <TITLE>Controls - A range validation Edit control</TITLE>
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A range validation Edit control
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This article was contributed by <A HREF="mailto:drkich@csrlink.net">Donald R. Kichline</A>.

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<P>Download <A HREF="range_edit_src.zip">Source Code</a> and <A HREF="range_edit_demo.zip">Example</A>
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<p>In a project that I am working with about 6 people, we were
using spin controls and edit controls to allow the operator to
change certain values. We decided we needed one way to handle
invalid data typed in the edit control by the operator. The best
solution we came up with was to sub-class CEdit, and validate the
operators key-strokes.</p>

<ol>
    <li>Ensure that the edit control has the number only style
        set to TRUE. </li>
    <li>Then you need to include the &quot;CRangeEdit.h&quot; in
        your dialog definition file, and declare CRangeEdit
        member variables for each edit control that you need to
        check the range of an operators input.</li>
    <li>Then you must set the range the CRangeEdit will accept
        from the operator, using the CRangeEdit::SetRange()
        method. The CRangeEdit will default to 0-100 range. </li>
    <li>Set the default contents of the control using
        CWnd::SetWindowText().</li>
</ol>

<p>You should be ready to go!</p>


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<p>Last updated: 29 April 1998

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<CENTER><FONT SIZE=-2>&copy; 1998 Zafir Anjum</FONT>&nbsp;</CENTER>
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