How to call a procedure from inside another procedure

Question

There is this link How do I Invoke a procedure when inside another procedure in Pascal But its not exactly my case.

procedure TForm1.Button1Click(Sender: TObject);
var
   [...]
begin
  // click on button
  [...]
end; 

and I have this procedure

procedure TForm1.CheckListBox2DblClick(Sender: TObject);
begin
  // on double click in flags
  [the same code like above]
end; 

i tryed this but it does not work

procedure TForm1.CheckListBox2DblClick(Sender: TObject);
begin
  TForm1.Button1Click;
end;    

then I tryed this

procedure TForm1.CheckListBox2DblClick(Sender: TObject);
begin
  TForm1.Button1Click(Sender: TObject);
end; 

it also does not work
Can somebody please help me ?

Answer 1

Just call it directly, using either nil or another component as the Sender:

procedure TForm1.CheckListBox2DblClick(Sender: TObject);
begin
  Button1Click(nil);
end;  

procedure TForm1.CheckListBox2DblClick(Sender: TObject);
begin
  Button1Click(CheckListBox2);
end;      

Note you don't use the classname (or variable name) of the form itself, since you're calling from the current instance of the form. IOW, do not use TForm1 or Form1 inside of a class method; that limits you to a specific instance of the form instead of being available to all instances. If you need to qualify it, use Self, as in Self.Button1Click(nil);.