Animation Form Alphablend onShow / OnClose Delphi

The trick to add animation effects alphablend current form onShow and OnClose.

Form design:
Add TTimer two components (with the given name of each: TimerOnShow, TimerOnClose). Change the second interval timer to 1 and set Enabled: = False.
   private
     intShow, intClose: Byte;
     CloseIt: Boolean;
   ...

TForm1.FormCreate procedure (Sender: TObject);
begin
   intShow: = 0;
   Alphablend: = True;
   AlphablendValue: = 0;
   CloseIt: = False;
   intClose: = 255;
end;

TForm1.FormShow procedure (Sender: TObject);
begin
   TimerOnShow.Enabled: = True;
end;

TForm1.FormCloseQuery procedure (Sender: TObject; var CanClose: Boolean);
begin
   Alphablend: = True;
   TimerOnClose.Enabled: = True;
   CanClose: = CloseIt;
end;

TForm1.TimerOnShowTimer procedure (Sender: TObject);
begin
   intShow: = intShow + 5;
   AlphablendValue: = intShow;
   if intShow> = 255 then
   begin
     TimerOnShow.Enabled: = False;
     Alphablend: = False;
   end;
end;

TForm1.TimerOnCloseTimer procedure (Sender: TObject);
begin
   intClose: = IntClose - 5;
   AlphablendValue: = intClose;
   if intClose <= 5 then
   begin
     CloseIt: = True;
     TimerOnClose.Enabled: = False;
     Close;
   end;
end;