C#把MDI子窗体变为标签页面(不改写任何控件)

H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\bin\Debug\WindowsApplication3.exe H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\bin\Debug\WindowsApplication3.pdb H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\obj\Debug\ResolveAssemblyReference.cache H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\obj\Debug\WindowsApplication3.Form1.resources H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\obj\Debug\WindowsApplication3.MDIParent1.resources H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\obj\Debug\WindowsApplication3.Properties.Resources.resources H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\obj\Debug\WindowsApplication3.csproj.GenerateResource.Cache H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\obj\Debug\WindowsApplication3.exe H:\Documents\Visual Studio 2005\Projects\WindowsApplication3\WindowsApplication3\obj\Debug\WindowsApplication3.pdb