How can i auto resize MFC SDI formview?

Question

I'm making a MFC SDI project.
There is a main view which i want to maximize, but I don't know how to do it.
(I succeeded to maximized main frame window, but failed to maximized the formview like below image.)
[enter image description here][2]

BOOL CProjectNameApp::InitInstance()
{
...
    m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
    m_pMainWnd->UpdateWindow();

    return TRUE;
}

void CProjectNameView::OnInitialUpdate()
{
    CFormView::OnInitialUpdate();
    
    //GetParentFrame()->RecalcLayout(TRUE);
    //ResizeParentToFit(FALSE);
}

These are the final things that i did so far.
I wrote m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED); to maximized main window,
and annotation two lines (GetParentFrame()->RecalcLayout(TRUE); and ResizeParentToFit(FALSE);) to the formview to fit the main frame.

I already searched on google and stackoverflow and read many answers but nothing helps me.. How can i solve this problem?
(+) The base class of mainview(ProjectNameView) is CFormview, not CView. And sorry for my poor english.
[2]: https://i.stack.imgur.com/dFMEY.png

Answer 1

To auto resize the controls inside the SDI formview, you don't have to write any line of code in VS2019. The rc Editor has the dynamic layout function capabilities.

Here a visualized example how to use it:

The result