create and destory MFC modeless dialog

new and create

void CProgramDlg::OnBnClickedButton1()
{
    CDlgModeless * dlg = new CDlgModeless();
    dlg->Create(CDlgModeless::IDD, this);
    dlg->ShowWindow(SW_SHOW);
}

 

 

需要处理，non-client area destory 消息，OK 按钮，Cancel 按钮

BEGIN_MESSAGE_MAP(CDlgModeless, CDialog)
    ON_WM_NCDESTROY()
    ON_BN_CLICKED(IDOK, &CDlgModeless::OnBnClickedOk)
    ON_BN_CLICKED(IDCANCEL, &CDlgModeless::OnBnClickedCancel)
END_MESSAGE_MAP()

 

在 non-client area destroy 时，delete 上面 new 出来的对话框

void CDlgModeless::OnNcDestroy()
{
    CDialog::OnNcDestroy();

    delete this;
}

 

在 OK 和 Cancel 时，调用 DestroyWindow，它会发出 WM_NCDESTORY

void CDlgModeless::OnBnClickedOk()
{
    if( UpdateData(true) )
        DestroyWindow();
}

void CDlgModeless::OnBnClickedCancel()
{
    DestroyWindow();
}