显示最初隐藏的无模型对话框 [英] Show modelless dialog initially hidden

问题描述

我有无模型子对话框.在资源属性中，可见标志设置为true.(根据我在资源属性中的要求，可见标志应为true).

I have modelless child dialog. In resource properties Visible flag is set as true.(As per my requirement in resource properties visible flag should be true).

我想在最初显示时以编程方式隐藏对话框.

I want to programmatically hide the dialog while initially displaying.

我重写了presubclasswindow，并使用下面的代码删除了WS_VISIBLE标志，但是对话框没有被隐藏.

I overrided the presubclasswindow and removed the WS_VISIBLE flag using below code but the dialog is not getting hidden.

void CAddressChildDlg::PreSubclassWindow()
{
    CWnd::PreSubclassWindow();
    if (::IsWindow(m_hWnd))
    {
        LONG lStyle = GetWindowLong(m_hWnd, GWL_STYLE);
        lStyle &= ~WS_VISIBLE;
        SetWindowLong(m_hWnd, GWL_STYLE, lStyle);  
    }
}

请任何人帮助我达到我的要求

Please anyone help me to achieve my requirement

推荐答案

您还可以覆盖ON_WM_WINDOWPOSCHANGING

class CMyDialog : public CDialog
{
public:
    bool m_override_showwindow;
    //initialize somewhere ... 

    void OnWindowPosChanging(WINDOWPOS* wpos)
    {
        if (m_override_showwindow)
            wpos->flags &= ~SWP_SHOWWINDOW;
        CDialog::OnWindowPosChanging(wpos);
    }
    DECLARE_MESSAGE_MAP()
    ...    
};

BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
    ON_WM_WINDOWPOSCHANGING()
    ...
END_MESSAGE_MAP()

仅当您不希望其显示对话框时才启用此替代.确保禁用替代，否则将永远不会显示对话框.

Enable this override only when you don't want it to show the dialog. Make sure to disable the override otherwise dialog is never shown.

dlg.m_override_showwindow = true;
dlg.Create(...);
dlg.m_override_showwindow = false;

MessageBox(L"Test...");
dlg.ShowWindow(SW_SHOW);

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