I have a maximised MDI child in an application, and when I open a second MDI
child, the first one is restored to its original state... I would like the
first child to be maximised, while the second one is on top of it. Is it
possible?

I have never seen any program with this sort of behavior. I do not think it can
be done.

Perhaps you could make the top window a regular window rather than an MDI child?

Erik Langeland

Try:

void __fastcall TForm::FormActivate(TObject *Sender)
{
  WindowState |= (TWindowState)wsMaximized;

and if You want to disable or avoid minimize-maximize button

in header :
  virtual void __fastcall WndProc(TMessage &Msg);

in source:
void __fastcall TForm::WndProc(TMessage &Msg)
{
  HMENU   hSystemMenu;    // the MDI child's system menu

  // This sample MDI child window procedure can be used to prevent the
  // MDI child from being maximized, minimized, or sized.
  //
  // Note that the child will still have a maximize button, a minimize
  // button, and a thick "sizing" border. Currently, there is no way to
  // prevent Windows from creating MDI children with these default
  // styles.
  //
  // We can, however, disable the maximizing, minimizing, and sizing
  // functionality by:
  //
  // 1. Disabling system menu options
  // 2. Trapping WM_SYSCOMMAND messages

  switch(Msg.Msg)
  {
    case WM_INITMENU:
         // Disable and gray the Maximize, Minimize, and Size items
         // on the MDI child's system menu
         hSystemMenu = GetSystemMenu(Handle, FALSE);
         EnableMenuItem(hSystemMenu, SC_MAXIMIZE, MF_DISABLED |
MF_BYCOMMAND);
         EnableMenuItem(hSystemMenu, SC_MINIMIZE, MF_DISABLED |
MF_BYCOMMAND);
         EnableMenuItem(hSystemMenu, SC_RESTORE, MF_DISABLED |
MF_BYCOMMAND);
         EnableMenuItem(hSystemMenu, SC_SIZE, MF_DISABLED | MF_BYCOMMAND);
         Return or break; // i'm not sure !!!

    case WM_SYSCOMMAND:
         // "Eat" these system commands to disable maximizing,
         // minimizing, and sizing functionality.
         // Note that wParam must be combined with 0xFFF0, using
         // the C bitwise AND (&) operator, when processing
         // the WM_SYSCOMMAND message.
         switch (Msg.WParam)
         {
           case SC_MAXIMIZE:
           case SC_MINIMIZE:
           case SC_SIZE:
           case SC_RESTORE:
                Msg.Result = 0L;
                return;
         }
  }
  TForm::WndProc(Msg);

Martin Lachance ha scritto nel messaggio
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