asked on

How to unable window Close Button at MFC???

CMenu* systemMenu = GetSystemMenu(false);

if(systemMenu)
{
systemMenu->EnableMenuItem(SC_CLOSE, MF_BYCOMMAND | MF_DISABLED);
}

Above coding, i found that cannot function at OnInitialUpdate().

Is it got any problem abouth this shot?

I would like to unable window close button when my program load...

TQ!

Nass89

Hi,
What is "systemMenu"?
Just add the following line to OnInitDialog() and the close button will be disabled.

BOOL CDlg9Dlg::OnInitDialog()
{
...
...

      CMenu* pSysMenu = GetSystemMenu(FALSE);
      if (pSysMenu != NULL)
      {
            CString strAboutMenu;
            strAboutMenu.LoadString(IDS_ABOUTBOX);
            if (!strAboutMenu.IsEmpty())
            {
                  pSysMenu->AppendMenu(MF_SEPARATOR);
                  pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
            }
// Add here
            pSysMenu->EnableMenuItem(SC_CLOSE, MF_BYCOMMAND | MF_DISABLED);
      }
...
...
}

Good Luck!

AlexFM

EnableMenuItem is CView class. View doesn't have system menu, GetSystemMenu returns NULL. You need to move this code to the frame class, and use another message handler, like WM_CREATE.

DannyGan9

ASKER

So what is the right way to enable the window close button????

TQ!

Nass89

Hi,
The codes are for dialog based view? Which class are you using?
MDI or SDI or Dialog?

ASKER CERTIFIED SOLUTION

OnegaZhang

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