<input type="hidden" value="c4a1f3104786b3cb874aa622a344aa0543178e12" name="YII_CSRF_TOKEN">
function GetValue(Str:string):String;
var
p1,p2:Integer;
begin
p1:=pos('value="',Str);
p2:=pos('" name="',Str);
Result:=Copy(Str,p1+7,(p2-p1)-7);
end;
procedure TForm1.FormCreate(Sender: TObject);
var
s: String;
begin
s := '<input type="hidden" value="c4a1f3104786b3cb874aa622a344aa0543178e12" name="YII_CSRF_TOKEN">';
Form1.Caption:=GetValue(s);
end;