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procedure TForm1.Button1Click(Sender: TObject);

  var
      bmp:  TBitmap;
      rgn:  HRGN;
  begin
      bmp  :=  TBitmap.Create;
      try
          bmp.LoadfromFile('D:\ÃâÒßÉøÂÊͼÏñ\ͼƬ 004.BMP');    //  ÄãÏëÏÔʾµÄͼƬ

          rgn  :=  CreateEllipticRgn(126,106,442,422);
          if  rgn  <>  0  then  begin
              try
                  SelectObject(Canvas.Handle,  rgn);
                  Canvas.Draw(0,0,bmp);
              finally
                  DeleteObject(rgn);
              end;
          end;
      finally
          bmp.Free;
      end;
end;
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procedure RunFunction;  
  type  
  TFunc = function(A: Integer): Integer;stdcall;¡¡//ÕâÀï¸ù¾ÝDLLÀïÃæº¯ÊýµÄÉùÃ÷ÐÞ¸Ä  
  var  
  ......

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Ttreeview 
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È磺DLLImport.GlobalAddAtom(¡­¡­);
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Delphi(Pascal) code:

unit UShare;
interface
uses Windows, Me ......

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