Организация простого калькулятора - PascalABC.NET

Program robota9;
uses
 System,
 System.Windows.Forms;
var
x,y,t:integer;
 myForm:Form;
 myLabel:&Label;
 mypicture:PictureBox;
 myButton:Button;
 myButton1:Button;
 myButton2:Button;
 myButton3:Button;
 myButton11:Button;
 myButton12:Button;
 myButton13:Button;
 myTextBox:TextBox;
 procedure MyButtonClick(sender:Object;e:EventArgs);
 begin
 val(myTextBox.Text,x,t);
 myTextBox.Text:='';
 end;
 procedure MyButton1Click(sender:Object;e:EventArgs);
 begin
 myTextBox.Text:=myTextBox.Text+'1';
 end;
 procedure MyButton2Click(sender:Object;e:EventArgs);
 begin
 myTextBox.Text:=myTextBox.Text+'2';
 end;
 procedure MyButton3Click(sender:Object;e:EventArgs);
 begin
 myTextBox.Text:=myTextBox.Text+'3';
 end;
 procedure MyButton11Click(sender:Object;e:EventArgs);
 begin
 myTextBox.Text:='';
 end;
 procedure MyButton12Click(sender:Object;e:EventArgs);
 begin
 val(myTextBox.Text,y,t);
 if t=0 then x:=x+y;
 t:=1;
 myTextBox.Text:=inttostr(x);
 myTextBox.Text:=myTextBox.Text+'!'
 end;
 procedure MyButton13Click(sender:Object;e:EventArgs);
 begin
 val(myTextBox.Text,x,t);
 myTextBox.Text:='';
 end;
 begin
  myForm:=new Form;
   myForm.Text:='Калькулятор Третяка';
   myform.Left:=500;
   myform.top:=500;
   myform.AutoSize:=true;
   myform.Width:=300;
   myform.Height:=400;
  myLabel:=new &Label;
   myLabel.Text:='Вікно результату';
   myLabel.Left:=10;
   myLabel.top:=20;
   myLabel.AutoSize:=true;
  myTextBox:=new TextBox;
   myTextBox.Left:=90;
   myTextBox.Top:=40;
   myTextBox.Enabled:=true;
   myTextBox.Width:=105;
   myTextBox.Height:=100;
   myTextBox.MaxLength:=16;
   myTextBox.ReadOnly:=true;
   myTextBox.Visible:=true;
  myButton:=new Button;
   myButton.Text:='+';
   myButton.Left:=200;
   myButton.top:=230;
   myButton.AutoSize:=true;
  myButton1:=new Button;
   myButton1.Text:='1';
   myButton1.Left:=10;
   myButton1.top:=70;
   myButton.AutoSize:=true;
  myButton2:=new Button;
   myButton2.Text:='2';
   myButton2.Left:=50;
   myButton2.top:=100;
   myButton2.AutoSize:=true; 
  myButton3:=new Button;
   myButton3.Text:='3';
   myButton3.Left:=90;
   myButton3.top:=130;
   myButton3.AutoSize:=true;  
  myButton11:=new Button;
   myButton11.Text:='C';
   myButton11.Left:=20;
   myButton11.top:=230;
   myButton11.AutoSize:=true;
  myButton12:=new Button;
   myButton12.Text:='=';
   myButton12.Left:=110;
   myButton12.top:=230;
   myButton12.AutoSize:=true; 
  myButton13:=new Button;
   myButton13.Text:='/';
   myButton13.Left:=200;
   myButton13.top:=230;
   myButton13.AutoSize:=true;
  myForm.Controls.Add(myButton); 
   myForm.Controls.Add(myTextBox);
    myForm.Controls.Add(myButton1); 
     myForm.Controls.Add(myButton2); 
      myForm.Controls.Add(myButton3);  
  myForm.Controls.Add(myButton11); 
   myForm.Controls.Add(myButton12); 
    myForm.Controls.Add(myButton13);
     myForm.Controls.Add(mylabel); 
  myForm.Controls.Add(myPicture); 
  
  myButton.Click+=MyButtonClick;
   myButton1.Click+=MyButton1Click;
    myButton2.Click+=MyButton2Click;
     myButton3.Click+=MyButton3Click;
  myButton11.Click+=MyButton11Click;
   myButton12.Click+=MyButton12Click;
    myButton13.Click+=MyButton13Click;
  Application.Run(myForm);  
 end.