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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> WinAPI: EqualRect、EqualSid、EqualPrefixSid - 判斷一個矩形

WinAPI: EqualRect、EqualSid、EqualPrefixSid - 判斷一個矩形

編輯:Delphi

unit Unit1; 
 
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 Button2Click(Sender: TObject); 
  procedure Button3Click(Sender: TObject); 
 end; 
 
var 
 Form1: TForm1; 
 
implementation 
 
{$R *.dfm} 
 
var 
 R1: TRect = (Left:20; Top:20; Right:20; Bottom:20); 
 R2: TRect = (Left:20; Top:20; Right:20; Bottom:20); 
 
//EqualRect 
procedure TForm1.Button1Click(Sender: TObject); 
var 
 s1,s2: string; 
begin 
 ShowMessage(BoolToStr(EqualRect(R1,R2), True)); {True} 
 
 OffsetRect(R2, 10, 10); 
 ShowMessage(BoolToStr(EqualRect(R1,R2), True)); {False} 
end; 
 
//EqualSid: 它可用於判斷所有結構; EqualRect 是專用於 TRect 的. 
procedure TForm1.Button2Click(Sender: TObject); 
begin 
 ShowMessage(BoolToStr(EqualSid(@R1,@R2), True)); {True} 
 
 OffsetRect(R2, 10, 10); 
 ShowMessage(BoolToStr(EqualSid(@R1,@R2), True)); {False} 
end; 
 
//EqualPrefixSid: 它和 EqualSid 的用法一樣, 可能是適用於和服務器聯系的. 
procedure TForm1.Button3Click(Sender: TObject); 
begin 
 ShowMessage(BoolToStr(EqualPrefixSid(@R1,@R2), True)); {True} 
 
 OffsetRect(R2, 10, 10); 
 ShowMessage(BoolToStr(EqualPrefixSid(@R1,@R2), True)); {False} 
end; 
 
end. 


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