How to prevent an MDI document from being minimized

Question

I'm maintaining a classic MDI MFC application, and I'd like to prevent the user from minimizing an MDI document window.

The best solution would be if I just could remove or disable the "Minimze" button from the MDI Window and remove/disable the "Minimize" command from the menu that shows up when you click on the upper left corner of the MDI window.

enter image description here

Using the Multiple Document Interface: Creating a Child Window: "To create an MDI child window that can have any combination of window styles, specify the MDIS_ALLCHILDSTYLES window style. When this style is not specified, an MDI child window has the WS_MINIMIZE, WS_MAXIMIZE, WS_HSCROLL, and WS_VSCROLL styles as default settings." — IInspectable

flaviu2 flaviu2 · Accepted Answer · 2015-07-01T06:27:51

Override PreCreateWindow from CChildFrame, and write:

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
  // TODO: Modify the Window class or styles here by modifying
  //  the CREATESTRUCT cs

  cs.style &= ~WS_MINIMIZEBOX;

  if(! CMDIChildWnd::PreCreateWindow(cs))
      return FALSE;

  return TRUE;
}

How to prevent an MDI document from being minimized

1 Answers