Delphi Component Palette 多行显示

1： 新建一个单元文件，复制如下代码，并保存名称为：MultiLinePaletteExpert.pas

unit MultiLinePaletteExpert;
interface
uses
Forms, Controls, ComCtrls;
implementation
type
TMultiLinePalette = class
public
procedure ResizeComponentPalette(Sender : TObject);
end;

var
MultiLinePalette : TMultiLinePalette;
procedure TMultiLinePalette.ResizeComponentPalette(Sender : TObject);

var
AHeight : integer;

begin
with (Sender as TTabControl) do begin
AHeight := Height + DisplayRect.Top - DisplayRect.Bottom + 29;
Constraints.MinHeight := AHeight;
Parent.Constraints.MaxHeight := AHeight;
end;
end; {ResizeMultiLineComponentPalette}
procedure SetMultiLineComponentPalette(MultiLine : boolean);
var
AppBuilder : TForm;
TabControl : TTabControl;
begin
AppBuilder := TForm(Application.FindComponent('AppBuilder'));
if (AppBuilder <> nil) then begin
TabControl := TTabControl(AppBuilder.FindComponent('TabControl'));
if (TabControl <> nil) then begin
TabControl.MultiLine := MultiLine;
if MultiLine then
TabControl.OnResize := MultiLinePalette.ResizeComponentPalette
else
TabControl.OnResize := nil;
end;
end;
end; {SetMultiLineComponentPalette}
initialization
MultiLinePalette := TMultiLinePalette.Create;
SetMultiLineComponentPalette(true);
finalization
SetMultiLineComponentPalette(false);
MultiLinePalette.Free;
end.

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2：打开Delphi 7，新建一个Package，Add刚刚保存的MultiLinePaletteExpert.pas文件，编译、安装。想卸载该Package，在Delphi菜单项选择Component/Install Pacgage，找到我们的bpl，remove它就可以了，简单吧！

3:最后打开你的Delphi7 ，Component Palette 是不是变多行了？