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delphi virtual dynamic

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type
  TFigure = class
    procedure Draw; virtual;
  end;
  TRectangle = class(TFigure)
    procedure Draw; override;
  end;
  TEllipse = class(TFigure)
    procedure Draw; override;
  end;
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var
  Figure: TFigure;
begin
  Figure := TRectangle.Create;
  Figure.Draw;  //µ÷ÓõÄÊÇTRectangle.Draw
  Figure.Destroy;
  Figure := TEllipse.Create;
  Figure.Draw;  //µ÷ÓõÄÊÇTEllipse.Draw
  Figure.Destroy;
end;
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delphi±¨¾¯ÉùÒô Beep¡¢MessageBeep ºÍ Windows.Beep


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procedure TForm1.Timer1Timer(Sender: TObject);
begin
   Windows.Beep(1200+i_f,10+i_f);
   if i_f<2000 then
   begin
      inc(i_f);
   end
end;
== ......

DelphiÖÐʵÏÖC++/JavaÀàËÆ¾²Ì¬±äÁ¿µÄ¹¦ÄÜ

ÔÚÍøÉÏ¿´µ½ºÜ¶àÈ˶¼ÔÚΪDelphiÊÇ·ñÖ§³ÖC++/JavaÖеľ²Ì¬±äÁ¿¼°¾²Ì¬·½·¨µÄ¹¦ÄܶøÀ§ÈÅ,ÆäʵÕâÔÚDelphiÖÐÊǺܼòµ¥µÄ.
¾²Ì¬·½·¨¾ÍÊÇʹÓÃClass Function. ¾²Ì¬±äÁ¿ÔòʹÓõ¥Ôª¾Ö²¿±äÁ¿À´ÊµÏÖ. ´úÂëÈçÏÂ:
//=========================================
// StaticVarTestU - ¶¨ÒåÁË¿ÉÒÔ¼ÆÊýµÄÀ࣬ͨ¹ýÀà·½·¨¼´¿É·ÃÎÊ´ËÀàµÄ¶ÔÏóÊý ......

delphi TWebBrowser×é¼þʹÓÃÏê½â

delphi TWebBrowser×é¼þʹÓÃÏê½â
      ¸Ã×é¼þÊÇÒ»¸öä¯ÀÀÆ÷×é¼þ£¬¿ÉÒÔÏÔʾһ¸öÖ¸¶¨µØÖ·µÄÍøÒ³¡¢ÉèÖÃÍøÒ³´ò¿ªÊ±µÄÖ÷Ò³ÒÔ¼°¶ÔÍøÒ³½øÐÐÏà¹ØµÄ²Ù×÷£¬Í¬Ê±Ò²¿ÉÒÔ¶ÔHTMLÎļþ½øÐмôÇС¢¸´ÖÆ¡¢Õ³Ìù¡¢É¾³ýµÈ²Ù×÷¡£¸Ã
      ×é¼þÔÚInternet×é¼þÒ³ÖС£
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delphi µ÷ÓÃC# webservice

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Webservice¼¼ÊõµÄ³öÏÖ½«¸÷ÖÖ¿ª·¢¼¼ÊõºÍÓïÑÔÍêÈ«µÄÈÚºÏÁË£¬ÏÂÃæ¾ÍÕâÖÖÈÚºÏÔÚC#ºÍdelphiÖ®¼äµÄ½»»¥×öÒ»´ÎÈ«ÃæµÄÌåÏÖ
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ʹÓÃvs2005µÄÄ£°å´´½¨C#µÄwebservice·Ç³£ÈÝÒס£Ô­ÎļþÈçÏÂ:
[WebService(Namespace  ......

Delphi±í´ïʽ

function ExpCalc(exp: string): string;
var
vScript: Variant;
begin
vScript := CreateOleObject('ScriptControl');
vScript.Language := 'VBScript';
Result := vScript.Eval(exp);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
s:string;
begin
s:=ExpCalc('100 *4.17/0.5*(55. ......
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