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delphiÖÐapplication.processmessagesµÄ×÷ÓÃ

procedure TForm1.Button2Click(Sender: TObject);
var
   I, J, X, Y: Word;
begin
   I := 0;
   J := 0;
   while I < 64000 do
   begin
     Randomize;
     while J < 64000 do
     begin
       Y := Random(J);
       Inc(J);
      Application.ProcessMessages;
     end;
     X := Random(I);
     Inc(I);
   end;
   Canvas.TextOut(10, 10, 'The Button2Click handler is finished');
end;
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*************************************************** ......

Delphi PureAPIWindow program

program PureAPIWindow;
uses
SysUtils,
Windows,
Messages;
const
WinClassName = 'DvsClass';
StrOut = 'Davis TextOut';
//´°¿Ú»Øµ÷º¯Êý
function MyWinProc(
hWindow: HWND;
aMessage: UINT;
WParam: WPARAM;
LParam: LPARAM): LRESULT; stdcall; export; ......

DelphiʵÏÖ͸Ã÷´°Ìå

unit unitMain;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2 ......

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¡¡¡¡GPS£¨Global Positioning System£©£¬¼´È«Çò¶¨Î»ÏµÍ³£¬ÀûÓÃ24¿ÅGPSÎÀÐǵIJâ¾àºÍ²âʱ¹¦ÄܽøÐÐÈ«Çò¶¨Î»£¬ÔÚÐí¶àϵͳÖУ¬Èç»ú³¡µ¼º½ÏµÍ³£¬³ö×â³µÁ¾¹ÜÀíºÍµ÷¶Èϵͳ¡¢½­ºÓÁ÷ÓòµÄÔÖº¦ÐÅÏ¢¹ÜÀíºÍÔ¤²âϵͳÖУ¬GPSµÃµ½Á˹㷺µÄÓ¦Óᣱ¾ÎÄÀûÓÃMSCOMM¿Ø¼þʵÏÖÁËGPSÊý¾ÝµÄ²É¼¯£¬¿ÉΪÐÅÏ¢¹ÜÀíºÍÖ¸»Óµ÷¶ÈµÈÌṩ¶¨Î»Êý¾Ý¡£
¡¡ ......

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Delphi×Ö·û´®¡¢PCharÓë×Ö·ûÊý×éÖ®¼äµÄת»»
ÉèÓÐÒÔÏÂÈý¸ö±äÁ¿£º
var
s:string;
p:pchar;
a:array[1..20] of char;
ÄÇôÈýÕßÖ®¼äµÄת»»ÈçÏ£º
1¡¢×Ö·û´®µ½PChar
    p:=PChar(s);
2¡¢PCharµ½×Ö·û´®
    s:=p;
3¡¢PCharµ½×Ö·ûÊý×é
    StrCopy(@a,p);
4¡¢×Ö·ûÊý×éµ ......
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