unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;type
TMouseButtons = set of TMouseButton;type
TForm1 = class(TForm)
Button1: TButton;
procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure FormCreate(Sender: TObject);
procedure FormMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
FMouseButtons: TMouseButtons;
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
Include(FMouseButtons, Button);
if FMouseButtons = [mbLeft, mbRight] then begin
ShowMessage('是不是这样');
end;
end;procedure TForm1.FormCreate(Sender: TObject);
begin
FMouseButtons := [];
end;procedure TForm1.FormMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
Exclude(FMouseButtons, Button);
end;procedure TForm1.Button1Click(Sender: TObject);
var
A: array of array of Integer;
begin
SetLength(A, 2, 3);
A[0, 0] := 1;
A[0, 1] := 2;
A[0, 2] := 3;
ShowMessage(IntToStr(A[0, 2]));
A := nil; //释放动态数组
end;end.
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;type
TMouseButtons = set of TMouseButton;type
TForm1 = class(TForm)
Button1: TButton;
procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure FormCreate(Sender: TObject);
procedure FormMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
FMouseButtons: TMouseButtons;
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
Include(FMouseButtons, Button);
if FMouseButtons = [mbLeft, mbRight] then begin
ShowMessage('是不是这样');
end;
end;procedure TForm1.FormCreate(Sender: TObject);
begin
FMouseButtons := [];
end;procedure TForm1.FormMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
Exclude(FMouseButtons, Button);
end;procedure TForm1.Button1Click(Sender: TObject);
var
A: array of array of Integer;
begin
SetLength(A, 2, 3);
A[0, 0] := 1;
A[0, 1] := 2;
A[0, 2] := 3;
ShowMessage(IntToStr(A[0, 2]));
A := nil; //释放动态数组
end;end.
SETLENGTH(DS,1,2)