Ultimate Pack  hot! Image Editor  new! Runtime Fusion Form Designer Object Inspector Print Suite Pro Commented Image Delphi Toys WinDowse Delphi Bonus TMS Scripter Studio Form Designer VB Form Designer .NET ...get more... for Delphi.NET, C#, VB.NET for Delphi VCL, BCB 3-6

	WinAPI Online Unix Manual Pages MegaDetailed.NET in3steps.com cdtrrracks.com new!   greatis.blogspot.com

The count of the MDIChild forms can be looked in the MDIChildCount property. In this example you can open 10 MDIChild forms only.
Don't forget to remove line
Application.CreateForm(TForm2, Form2) from project file and line
var Form2: TForm2 from unit2.pas file.

procedure TForm1.New1Click(Sender: TObject);
var
  ChildForm: TForm2;
begin
  if MDIChildCount<10 then
  begin
    ChildForm:=TForm2.Create(Application);
    ChildForm.Caption:='Child - '+IntToStr(MDIChildCount);
  end;
end;

Related topics

Hide MDIChild form

For more

Win32 programmer's reference

Download source