Visual c++ CTreeCtrl：如何清除所选项目的焦点

我是MFC新手，我想将完全相同的Ctrl+Page Down和Ctrl+Page Up行为复制到常规的Page Down/Page Up键，而不使用任何支持键（Ctrl/Shift）。我一直在试图清除项目的重点，这是得到自动点击键页上下页选择

我已尝试使用此代码，但不起作用：

case VK_NEXT:   // pagedown
case VK_PRIOR:  // pageup
    lhItem = GetFocusedItem();
    if (IsSelected(lhItem))
    {
        CTreeCtrl::SetItemState(lhItem, 0, TVIS_SELECTED);
    }
    break;

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有人能帮我解决这个问题吗

需要用OnSelChanging和OnSelChanged事件处理函数编写的代码

void CTreeCtrl::OnSelchanging(NMHDR *pNMHDR, LRESULT *pResult)
{
    HTREEITEM hNew = pNMTreeView->itemNew.hItem;
    HTREEITEM hOld = pNMTreeView->itemOld.hItem;

    m_bOldItemSelected = hOld && (CTreeCtrl::GetItemState(hOld, UINT(TVIS_SELECTED)) & TVIS_SELECTED);

if (GetSelectedCount() > 1)
{
    if (m_bPgUpState || m_bPgDownState)
    {
        //Check the state of New Item
        if ((pNMTreeView->itemNew.state & TVIS_SELECTED))
        {
            // If the item is selected, so make sure OnSelchanged()
            // will "select" it !
            m_bNewItemSelected = TRUE;
        }
        else if (!(pNMTreeView->itemNew.state & TVIS_SELECTED))
        {
            // The New item is not selected, so make sure OnSelchanged()
            // will not "re-select" it !
            m_bNewItemSelected = FALSE;
            CTreeCtrl::SetItemState(hNew, UINT(~TVIS_SELECTED), UINT(TVIS_SELECTED));
        }
    }
}

void TreeCtrl::OnSelchanged(NMHDR* pNMHDR, LRESULT* pResult)
{
    NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;

    HTREEITEM itemNew = pNMTreeView->itemNew.hItem;
    HTREEITEM itemOld = pNMTreeView->itemOld.hItem;
if ((m_bPgUpState || m_bPgDownState) && (GetSelectedCount() > 1)
    && (pNMTreeView->itemOld.hItem != NULL || pNMTreeView->itemNew.hItem != NULL))
{
    // It had the focus so Keep selection at old item
    if (itemOld && m_bOldItemSelected)
    {
        CTreeCtrl::SetItemState(itemOld, UINT(TVIS_SELECTED), UINT(TVIS_SELECTED));
        m_bOldItemSelected = FALSE;
    }
    else
    {
        // Do-not select the item if it is not selected
        CTreeCtrl::SetItemState(itemOld, UINT(~TVIS_SELECTED), UINT(TVIS_SELECTED));
    }

}

在本文中，您将找到有关CTreeCtrl的所有问题的解决方案

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请以后尽量不要太草率地设置格式，一定要阅读。你把“此代码”放在哪里了？我把我的代码保存在void CiTreeCtrl:：OnKeyDown（UINT nChar、UINT nrepnt、UINT nFlags）{}函数中