You are creating a Windows Forms Application by using the .NET Framework 3.5.You plan to design a control for the application.You need to ensure that the control meets the following requirements：   
（1）Contains the DataGridView， BindingSource， and BindingNavigator controls. 
（2）Exposes the properties of the BindingSource control.  
（3）Protects the properties of the DataGridView and BindingNavigator controls.   
What sholud you do？（）

单项选择题YouarecreatingaWindowsFormsapplicationbyusingthe.NetFramework3.5Youplantodisplaydetailedhelpinstructionsforeachcontrolintheform.Youcreateahelpfile.YouconfigureaHelpProvidercomponentontheform.YouneedtodisplaythehelpfileforthecontrolthatisfocusedwhentheF1keyispressed.WhichmethodoftheHelpProviderclassshouldyoucallforeachcontrol？（）

A.SetShowHelp
B.SetHelpString
C.SetHelpKeyword
D.SetHelpNavigator

多项选择题YouaredevelopingaWindowsFormsApplicationbyusingthe.NETFramework3.5.YouplantocreateacustomizedPrintPreviewdialogboxintheapplication.Youneedtoensurethatuserscanpreviewtheirdocumentsbeforeprinting.Whichtwoactionsshouldyouperform？（）

A.Add a PrintPreviewDialog control to the form.
B.Add a PrintPreviewControl control to the form.
C.Create and initialize a PrintDocument object on the form and then implement the PrintPage event handler.
D.Create and initialize a PrintDocument object on the form and then implement the BeginPrint event handler.
E.Set the Document property of the PrintPreviewDialog control to the PrintDocument instance that must be printed.

单项选择题YouaredevelopingaWindowsFormsApplicationbyusingthe.NETFramework3.5.Youplantodesignacompositecustomcontrolfortheapplication.YouincludeaListBoxcontrolhasapropertythatprovidestheitemcountoftheListBoxcontrol.Youneedtoensurethatthepropertycannotbeaccessedatdesigntime.Whichattributeshouldyouuse？（）

A.[Bindable（false）]
B.[DesignOnly（false）]
C.[EditorBrowsable（EditorBrowsableState.Never）]
D.[Browsable（false）]

单项选择题YouarecreatingaWindowsFormsapplicationbyusingthe.NETFramework3.5.Youplantodevelopanewcontrolfortheapplication.YouneedtoensurethatthecontrolextendstheDataGridViewcontrolbyallowingthecellstocontainmulticoloredtext.Whatshouldyoudo？（）

A.Override the OnPaint method.
B.Write a code segment to handle the CellPainting event.
C.Write a code segment to handle the CellParsing event.
D.Write a code segment to handle the RowPostPaint event.

单项选择题YouarecreatingaWindowsFormsApplicationbyusingthe.NETFramework3.5.YouplantocreateaWindowsInstallerpackageforaWindowsFormsapplication.ThepackagewillbedeployedonWindowsVistacomputers.Youneedtoensurethatduringdeploymenttheinstallationdoesnotelevateprivilegesoftheuserinstallingtheapplication.Whatshouldyoudo？（）

A.Create a custom action and set the NoImpersonate property to true
B.Create a custom action and set the NoImpersonate property to false
C.Create a manifest and set the RequestedExecutionLevel level attribute to AsInvoker
D.Create a manifest and set the RequestedExecutionLevel level attribute to AsAdministrator