MFC中设置列表控件（或列表视图）的最小和最大列宽

使所有列拥有共同的最小和最大列宽

声明常量

class CMyCtrl/CMyView :
	public CListCtrl/CListView
{
...
protected:
	const int m_nMinWidth = 80;
	const int m_nMaxWidth = 320;
...
}

重载虚函数OnNotify

BOOL CMyCtrl/CMyView::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
	HD_NOTIFY* pHDN = (HD_NOTIFY*)lParam;
	switch (pHDN->hdr.code)
	{
	case HDN_ITEMCHANGINGA:
	case HDN_ITEMCHANGINGW:
		if (pHDN->pitem->cxy < m_nMinWidth) // 最小列宽
			pHDN->pitem->cxy = m_nMinWidth;
		else if (pHDN->pitem->cxy > m_nMaxWidth) // 最大列宽
			pHDN->pitem->cxy = m_nMaxWidth;
		break;
	default:
		break;
	}
	return CListView::OnNotify(wParam, lParam, pResult);
}

使每一列单独拥有最小和最大列宽

声明常量数组

class CMyCtrl/CMyView :
	public CListCtrl/CListView
{
...
protected:
	const int m_nMinWidth[4] = { 80,80,100,100 };
	const int m_nMaxWidth[4] = { 320,320,300,300 };
...
}

重载虚函数OnNotify

BOOL CMyCtrl/CMyView::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
	HD_NOTIFY* pHDN = (HD_NOTIFY*)lParam;
	switch (pHDN->hdr.code)
	{
	case HDN_ITEMCHANGINGA:
	case HDN_ITEMCHANGINGW:
		if (pHDN->pitem->cxy < m_nMinWidth[pHDN->iItem]) // 最小列宽
			pHDN->pitem->cxy = m_nMinWidth;
		else if (pHDN->pitem->cxy > m_nMaxWidth[pHDN->iItem]) // 最大列宽
			pHDN->pitem->cxy = m_nMaxWidth;
		break;
	default:
		break;
	}
	return CListView::OnNotify(wParam, lParam, pResult);
}