在程序运行时如何实现拖动、调整控件的大小，

[zxtyhy]

在程序运行时如何实现拖动、调整控件的大小，
有控件吗？
[e-mail]
[e-mail]
（如果解决连同以前的200分一起送上）

[Billy_Chen28]

一段程序：
unit SizerControl;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;
type
TSizerControl = class(TCustomControl)
private
FControl: TControl;
FRectList: Array [1..8] of TRect;
FPosList: Array [1..8] of Integer;
{ Private declarations }
protected
{ Protected declarations }
public
constructor Create(AOwner: TComponent; AControl: TControl);
procedure CreateParams(var Params: TCreateParams); override;
procedure Createhandle;override;
procedure WmNcHitTest(var Msg: TWmNcHitTest); message wm_NcHitTest;
procedure WmSize(var Msg:TWmSize); message wm_Size;
procedure WmLButtonDown(var Msg: TWmLButtonDown); message wm_LButtonDown;
procedure WmMove(var Msg: TWmMove); message Wm_Move;
procedure Paint; override;
procedure SizeControlExit(Sender: TObject);
{ Public declarations }
published
{ Published declarations }
end;
const
sc_DragMove: Longint = $F012;
procedure Register;
implementation
constructor TSizerControl.Create(AOwner: TComponent; AControl: TControl);
var
R: TRect;
begin
inherited Create(AOwner);
FControl := AControl;
OnExit := SizeControlExit;
R := FControl.BoundsRect;
InflateRect(R, 2, 2);
BoundsRect := R;
Parent := FControl.Parent;
FPosList[1] := htTopLeft;
FPosList[2] := htTop;
FPosList[3] := htTopRight;
FPosList[4] := htRight;
FPosList[5] := htBottomRight;
FPosList[6] := htBottom;
FPosList[7] := htBottomLeft;
FPosList[8] := htLeft;
end;
procedure TSizerControl.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams(Params);
//增加透明特性
Params.ExStyle := Params.ExStyle
+ WS_EX_TRANSPARENT;
end;
procedure TSizerControl.Createhandle;
begin
inherited Createhandle;
SetFocus;
end;

procedure TSizerControl.WmNcHitTest(var Msg: TWmNcHitTest);
var
Pt: TPoint;
I: Integer;
begin
Pt := Point(Msg.XPos, Msg.YPos);
Pt := ScreenToClient(Pt);
Msg.Result := 0;
//检测鼠标位置并改变状态
for I := 1 to 8 do
if PtInRect(FRectList[I], Pt) then
Msg.Result := FPosList[I];
if Msg.Result = 0 then
inherited;
end;

procedure TSizerControl.WmSize(var Msg:TWmSize);
var
R: TRect;
begin
R := BoundsRect;
InflateRect( R, -2, -2);
FControl.BoundsRect := R;
//计算8个黑方框
FRectList[1] := Rect(0 ,0, 5, 5);
FRectList[2] := Rect(Width div 2 - 3, 0, Width div 2 + 2, 5);
FRectList[3] := Rect(Width - 5, 0, Width, 5);
FRectList[4] := Rect(Width - 5, height div 2 - 3, Width, Height div 2 + 2);
FRectList[5] := Rect(Width - 5, Height - 5, Width, Height);
FRectList[6] := Rect(Width div 2 - 3, Height - 5, Width div 2 + 2, Height);
FRectList[7] := Rect(0, Height -5, 5, Height);
FRectList[8] := Rect(0, Height div 2 - 3, 5, Height div 2 + 2);
end;


procedure TSizerControl.WmLButtonDown(var Msg: TWmLButtonDown);
begin
//执行拖动命令
Perform(Wm_SysCommand, sc_DragMove, 0);
end;

procedure TSizerControl.WmMove(var Msg: TWmMove);
var
R: TRect;
begin
R := BoundsRect;
InflateRect( R, -2, -2);
FControl.Invalidate;
FControl.BoundsRect := R;
end;
procedure TSizerControl.Paint;
var
I: Integer;
begin
Canvas.Brush.Color := clBlack;
for I := 1 to 8 do
with FRectList[I] do
Canvas.Rectangle (Left, Top, Right, Bottom);
end;

procedure TSizerControl.SizeControlExit(Sender: TObject);
begin
Free;
end;
procedure Register;
begin
RegisterNoicon([TSizerControl]);
end;

end
主窗口程序：
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ExtCtrls;

type
TForm1 = class(TForm)
btn: TButton;
GroupBox1: TGroupBox;
procedure btnMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure GroupBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
private

{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation
uses SizerControl;

{$R *.DFM}

procedure TForm1.btnMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
SizeControl: TSizerControl;
begin
SizeControl := TSizerControl.Create(self, btn);
end;

procedure TForm1.GroupBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
SizeControl: TSizerControl;
begin
SizeControl := TSizerControl.Create(self, GroupBox1);
end;
end.

[Billy_Chen28]

第三方组件：HANDEL或Resizer

[zxtyhy]

to: cg1120(代码最优化－§雪是冷的，人是暖的§)

有第三方组件吗？
我的Email: [e-mail]
[e-mail]

[aiirii]

我的经验:我先是自己编,已经可用,但后来下载了别人的控件,发觉更好,但,当然,使用中还有些问题,要自己在根据自己的需要改进拉

[hjb8000]

自己编，这个不太难！！就是麻烦点！！1