Delphi - Hidden MDI child form creation

Question

My application has many many mdi forms and they are created after successfull user login. How can I best hide this creation process? It looks stupid and it takes longer time

Answer 1

I had a similar problem with flickering MDI childs. I used combination of overrinding AfterConstruction and WM_SETREDRAW message from this tip: Controlling the placement of fsMDIChild windows in Delphi

SendMessage(Application.MainForm.ClientHandle, WM_SETREDRAW, False, 0);
try
  Child := TChildForm.Create(Self);
  Child.Left := ...;
  Child.Top := ...;
  Child.Show;
finally
  SendMessage(Application.MainForm.ClientHandle, WM_SETREDRAW, True, 0);
  InvalidateRect(Application.MainForm.ClientHandle, nil, True);
end;

And everything works fine.