本例效果图:

代码文件:

代码文件:
窗体文件:unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls; type TForm1 = class(TForm) Panel1: TPanel; Panel2: TPanel; Panel3: TPanel; RadioButton1: TRadioButton; RadioButton2: TRadioButton; procedure Panel1Click(Sender: TObject); procedure FormCreate(Sender: TObject); end; var Form1: TForm1; implementation {$R *.dfm} procedure TForm1.FormCreate(Sender: TObject); begin RadioButton1.Caption := '置前'; RadioButton2.Caption := '置后'; RadioButton1.Checked := True; Panel2.OnClick := Panel1Click; Panel3.OnClick := Panel1Click; Panel1.ParentBackground := False; Panel1.Color := clRed; Panel2.ParentBackground := False; Panel2.Color := clLime; Panel3.ParentBackground := False; Panel3.Color := clBlue; end; procedure TForm1.Panel1Click(Sender: TObject); begin if RadioButton1.Checked then TPanel(Sender).BringToFront; if RadioButton2.Checked then TPanel(Sender).SendToBack; end; end.
object Form1: TForm1 Left = 0 Top = 0 Caption = 'Form1' ClientHeight = 174 ClientWidth = 264 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False OnCreate = FormCreate PixelsPerInch = 96 TextHeight = 13 object Panel1: TPanel Left = 8 Top = 16 Width = 151 Height = 41 Caption = 'Panel1' TabOrder = 0 OnClick = Panel1Click end object Panel2: TPanel Left = 46 Top = 40 Width = 151 Height = 41 Caption = 'Panel2' TabOrder = 1 end object Panel3: TPanel Left = 102 Top = 63 Width = 151 Height = 41 Caption = 'Panel3' TabOrder = 2 end object RadioButton1: TRadioButton Left = 32 Top = 136 Width = 113 Height = 17 Caption = 'RadioButton1' TabOrder = 3 end object RadioButton2: TRadioButton Left = 151 Top = 136 Width = 113 Height = 17 Caption = 'RadioButton2' TabOrder = 4 end end
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