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1£¬ ´ò¿ªDELPHI£¬Ð½¨Ò»¸öDll Wizard
2£¬ ÔÚн¨µÄDllÀïн¨Ò»¸öForm
3£¬ ÔÚн¨µÄFormÀïuses stdctrls
4£¬ ÔÚvarÏÂÃæÐ´£º
Procedure synapp(App:THandle);stdcall;
Procedure showform;stdcall;
5£¬ È»ºóÔÚimplementation ÏÂÃæuses math
6£¬ ÔÚ{$R *.dfm}ÏÂÃæÐ´
Procedure synapp(App:THandle);stdcall;
Begin
  Application.Handle:=app;
End;
Procedure showform;stdcall;
Begin
  Form1:=Tform1.create(application);
  Form1.show;
End;
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exports
Sysapp,show;
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Procedure synapp(App:THandle);stdcall;external ‘my.dll’ ;//----ÄãµÄDLLÎļþÃû
Procedure showform;stdcall;external‘my.dll’;//----ÄãµÄDLLÎļþÃû
×¢£º°ÑÄãдºÃµÄDLL·ÅÔÚ±¾³ÌÐòµÄͬһĿ¼Ï£¬ºÍÉÏÃæÒ»Ñù£¬Òªuses math;
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Synapp(applicatiln.Handle);
Showform;


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µ¥ÔªÒýÓÃComObj;
procedure TForm1.Button1Click(Sender: TObject);
var
VCDOMessage:oleVariant;
begin
  vCDOMessage:=CreateOleObject('CDO.Message');
  vcdomessage.from:='MR.F'+'< ......

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 Delphi ÖÐ FindWindow ºÍ FindWindowEx µÄÓï·¨ºÍÓ÷¨
FindWindow(
lpClassName,        {´°¿ÚµÄÀàÃû}
lpWindowName: PChar {´°¿ÚµÄ±êÌâ}
): HWND;              {·µ»Ø´°¿ÚµÄ¾ä±ú; ʧ°Ü·µ»Ø 0}
//FindWin ......

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ShowMessage(IntToStr(GetSystemMetrics(SM_CYSCREEN)-GetSystemMetrics(SM_CYFULLSCREEN)-GetSystemMetrics(SM_CYCAPTION)));
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function GetSystemTaskBarHeight:Integer;
var
R:TRect;
begin
SystemParametersInfo(SPI_GETWORKAREA,0,@R,0);
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unit MyADO;
interface
uses
SysUtils, Classes,ADODB,DB,Variants,StdCtrls,Dialogs;
type
TMyADO = class(TComponent)
    private
    Connection: TADOConnection;
    Query: TADOQuery;
    Table: TADOTable;
    FConnectio ......

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String
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