转载~~~~~~~~~~~~源地址忘记了~~~~~~
禁止ListCtrl表头拖动（Prevent CListCtrl column resizing）
/*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. */
BOOL CMyListCtrl::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
switch (((NMHDR*)lParam)->code)
{
case HDN_BEGINTRACKW:
case HDN_BEGINTRACKA:
*pResult = TRUE; // disable tracking
return TRUE; // Processed message
}

return CListCtrl::OnNotify(wParam, lParam, pResult);
}  
/*
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. */

BOOL CMyListCtrl::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
HD_NOTIFY *pHDN = (HD_NOTIFY*)lParam;

if((pHDN->hdr.code == HDN_BEGINTRACKW || pHDN->hdr.code == HDN_BEGINTRACKA)
&& pHDN->iItem == 0) // Prevent only first (col# 0) from resizing
{
*pResult = TRUE; // disable tracking
return TRUE; // Processed message
}

return CListCtrl::OnNotify(wParam, lParam, pResult);
}