Title: Set caret position in RichEdit
Use standard properties of the RichEdit component.
SelStart is a new position of the caret.
SelLength is the number of characters that are selected. This parameter should be 0, if we want to work with caret only.
procedure TForm1.Button1Click(Sender: TObject);
begin
with RichEdit1 do
begin
SetFocus;
SelStart:=30;
SelLength:=0;
end;
end;