windows - 我应该使用SendDlgItemMessage还是WTL中有包装器？

我在名为IDC_LIST1的对话框资源中添加了一个列表框控件。我应该使用SendDlgItemMessage()与该控件进行交互，还是使用WTL有更好的方法？这是我的事件处理程序。还算不错!

LRESULT OnAddItem(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
{
    SendDlgItemMessage(IDC_LIST1, LB_INSERTSTRING, (WPARAM) 0, (LPARAM)_T("Hi"));
    return 0;
}

LRESULT OnRemoveItem(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
{
    // Get selected item
    int item = SendDlgItemMessage(IDC_LIST1, LB_GETCURSEL, (WPARAM) 0, (LPARAM) 0);
    // Remove the item at the index of the selected item
    SendDlgItemMessage(IDC_LIST1, LB_DELETESTRING, (WPARAM) 0, (LPARAM)item);
    return 0;
}

最佳答案

WTL建议的方式如下:

class CMyDlg : public CDialogImpl<CMyDlg>
{
public:
    enum {IDD = IDD_MYDLG};
    CListBox m_lb1;
// ...
    BEGIN_MSG_MAP(CMyDlg)
        MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)
        COMMAND_ID_HANDLER(ID_ADDITEM, OnAddItem)
        COMMAND_ID_HANDLER(ID_REMOVEITEM, OnRemoveItem)
        // ...
    END_MSG_MAP()
// ...
    LRESULT OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
    {
        m_lb1.Attach(GetDlgItem(IDC_LIST1));
        // ...
    }
    LRESULT OnAddItem(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
    {
        return m_lb1.AddString(_T("Hi"));
    }
    LRESULT OnRemoveItem(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
    {
        return m_lb1.DeleteString(m_lb1.GetCurSel());
    }
// ...
};

atlctrls.h中提供了针对通用控件和Windows控件的WTL支持类，您还可以查看WTL for MFC Programmers, Part IV - Dialogs and Controls。