1.新建一个窗体，设置Name为MyPreview。
　　2.在窗体上添加一Toolbar控件， 模仿默认预览窗口创建相应的Toolbutton，并设置各按钮的Hint提示。
　　3.添加一Panel控件，对齐方式置 为alBottom。再在此Panel上放一ProgressBar(左对齐)和Panel(右对齐)， 分别显示报表装载进度和其他提示信息。
　　4.添加QRPreview控件，对齐方式 置为alClient。
　　5.添加OpenDialog，设置Filter 属性为*.QR；添加SaveDialog，设置Filter属性为*.QR|*.TXT|*.HTM|*.CSV， 设置DefaultExt属性为*.QR。
　　6.双击各个Toolbutton，输入相 应代码。
　　可以按以下方法调用自定义预览 窗口。

重载TQuickRep的OnPreview事件， 输入如下代码：

procedureTRptForm.RptFormPreview(Sender:TObject);
begin
withTMyPreview.Create(Application)do
begin
QRPreview1.QRPrinter:=TQRPrinter(Sender);
CurRep:=self;
Show;
end;
end;

附各成员方法的具体实现：

unitMyprv;
interface
uses
Windows,Messages,SysUtils,Classes,Graphics,Controls, Forms,Dialogs,ComCtrls,ToolWin,qrprntr,Quickrpt,StdCtrls, ExtCtrls,qrextra,qrhtml;

type
TMyPreview=class(TForm)
QRPreview1:TQRPreview;
ToolBar1:TToolBar;
(其余成员变量和成员方法声明略。)
private
{Privatedeclarations}
FPageCount:integer;// 生成报表的总页数
public
{Publicdeclarations}
CurRep:TQuickRep; //所预览的报表
procedureUpdatePanelShow;
end;

implementation

{$R*.DFM}
procedureTMyPreview.UpdatePanelShow;
begin//更新显示
Panel2.Caption:=第+inttostr(QRPreview1. eNumber)+ 页总+inttostr(FPageCount)+页;
end;

procedureTMyPreview.ToolButton2Click(Sender:TObject);
begin//ZoomToFit缩放至全屏
QRPreview1.ZoomToFit;
end;

procedureTMyPreview.ToolButton3Click(Sender:TObject);
begin//ZoomTo100%缩放至实际大小
QRPreview1.Zoom:=100;
end;

procedureTMyPreview.ToolButton4Click(Sender:TObject);
begin//ZoomToWidth缩放至页宽
QRPreview1.ZoomToWidth;
end;

procedureTMyPreview.ToolButton6Click(Sender:TObject);
begin//Firstpage
QRPreview1.PageNumber:=1;
UpdatePanelShow;
end;

procedureTMyPreview.ToolButton8Click(Sender:TObject);
begin//priorpage
QRPreview1.PageNumber:=QRPreview1.PageNumber+1;
UpdatePanelShow;
end;

procedureTMyPreview.ToolButton7Click(Sender:TObject);
begin//nextpage
QRPreview1.PageNumber:=QRPreview1.PageNumber1;
ifQRPreview1.PageNumber=0then
QRPreview1.PageNumber:=1;
UpdatePanelShow;
end;

procedureTMyPreview.ToolButton9Click(Sender:TObject);
begin//Lastpage
QRPreview1.PageNumber:=FPageCount;
UpdatePanelShow;
end;

procedureTMyPreview.QRPreview1PageAvailable(Sender:TObject; PageNum:Integer);
begin//getpagecount
FPageCount:=PageNum;
UpdatePanelShow;
end;

procedureTMyPreview.FormClose(Sender:TObject;varAction:TCloseAction);
begin
CurRep:=nil;
Action:=caFree;
end;

procedureTMyPreview.ToolButton14Click(Sender:TObject);
begin//closethewindow
Close;
end;

procedureTMyPreview.ToolButton11Click(Sender:TObject);
begin//printsetup
QRPreview1.QRPrinter.PrintSetup;
end;

procedureTMyPreview.ToolButton13Click(Sender:TObject);
begin//print
QRPreview1.QRPrinter.Print;
end;

procedureTMyPreview.ToolButton16Click(Sender:TObject);
begin//savebutton
ifSaveDlg1.Executethen
begin
if(SaveDlg1.FIlterIndex $#@60;$#@62;1)and(CurRep=nil)then
Exit;
caseSaveDlg1.FilterINdexof
1://*.QR
QRPreview1.QRPrinter.Save(SaveDlg1.FileName);
2://*.TXT
CurRep.ExportToFilter(TQRAsciiExportFilter.Create(SaveDlg1.FileName));
3://*.HTM
CurRep.ExportToFilter(TQRHTMLExportFilter.Create(SaveDlg1.FileName));
4: //*.CSV
CurRep.ExportToFilter(TQRCSVExportFilter.Create(SaveDlg1.FileName));
end;
end;
end;

procedureTMyPreview.ToolButton17Click(Sender:TObject);
begin//loadbutton
ifOpenDlg1.Executethen
QRPreview1.QRPrinter.Load(OpenDlg1.FileName);
end;

procedureTMyPreview.QRPreview1ProgressUpdate(Sender:TObject; Progress:Integer);
begin//updageprogressbar
ProgressBar1.Position:=Progress;
end;

procedureTMyPreview.SaveDlg1TypeChange(Sender:TObject);
begin//setDefaultExtpropertyofSavedialog
withSaveDlg1do
caseFilterIndexof
0: DefaultExt:=.QR;
1: DefaultExt:=.TXT;
2: DefaultExt:=.HTM;
3: DefaultExt:=.CSV;
end;
end;
end.//endofUnit