no_col_resize.shtml

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   <TITLE>Prevent CListCtrl column resizing</TITLE>
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<FONT COLOR="#AOAO99">Prevent CListCtrl column resizing</FONT></H3></CENTER>

<HR WIDTH="100%">The header control in the ListView control sends notification
to the parent window (e.i. the ListView) before it begins resizing a column.
We can override the OnNotify() function in the CListCtrl derived class
to handle this notification. The code below prevents resizing of all columns.
Note that the resize cursor still shows up.
<PRE><TT><FONT COLOR="#990000">BOOL CMyListCtrl::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)&nbsp;
{
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; switch (((NMHDR*)lParam)->code)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; case HDN_BEGINTRACKW:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; case HDN_BEGINTRACKA:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *pResult = TRUE;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // disable tracking
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return TRUE;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // Processed message
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }
&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return CListCtrl::OnNotify(wParam, lParam, pResult);
}</FONT></TT></PRE>
If you want to prevent resizing of only one column, you should check for
the value in iItem field of the HD_NOTIFY structure. The code below stops
only the first column from being resized.
<BR>&nbsp;
<PRE><TT><FONT COLOR="#990000">BOOL CMyListCtrl::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)&nbsp;
{
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HD_NOTIFY&nbsp;&nbsp; *pHDN = (HD_NOTIFY*)lParam;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if((pHDN->hdr.code == HDN_BEGINTRACKW || pHDN->hdr.code == HDN_BEGINTRACKA)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &amp;&amp; pHDN->iItem == 0)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // Prevent only first (col# 0) from resizing
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *pResult = TRUE;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // disable tracking
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return TRUE;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // Processed message
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }
&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return CListCtrl::OnNotify(wParam, lParam, pResult);
}</FONT></TT></PRE>
&nbsp;

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