Hi Group, I have a projects with Delphi 5 use TntUnicode

Hi Group, I have a projects with Delphi 5 use TntUnicode,
And now, i build it in delphi 2010; but i have some problem with Unicode ( delphi 2010 suport Unicode, so i don't use TntUnicode Control );
First:  How to replace 2 function 
        WideCanvasTextExtent(TextBitmap.Canvas, Caption)                                      ;WideCanvasTextOut(TextBitmap.Canvas,0,0,Caption); 
Else: GetText; SetText; IsCaptionStored ; in Controls units  not be declared ;