Example Use of Package Tools StartorNewHook Function

// package parameters

Static StrConstant thePackage="YourPackageNameHere"
Static StrConstant thePackageFolder="YourPackageFolderHere"
Static StrConstant theProcedureFile = "YourPackageProcedureFileHere.ipf"
Static StrConstant thePackageInfo = "This is what your package does"
Static StrConstant thePackageAuthor = "Your Name Here"
Static Constant thePackageVersion = 1.0
Static Constant hasHelp = 0  // 0-no; 1-yes (called by DisplayHelpTopic "YourPackageName"

// hook function (at top of procedure file for you package)

Static Function AfterFileOpenHook(refNum,file,pathName,type,creator,kind)
    Variable refNum,kind
    String file,pathName,type,creator

    SVAR/Z pt = root:Packages:PackageTools:AnnotationTools
    String theCmd
   
    if (!SVAR_Exists(pt))
        // initialize package information
        DFREF cdf = GetDataFolderDFR()
        NewDataFolder/O/S Packages
        NewDataFolder/O PackageTools
        SetDataFolder cdf
        sprintf theCmd, "PackageSetup(\"%s\",file=\"%s\",info=\"%s\",author=\"%s\",version=%g,hasHelp=%d)", thePackage,theProcedureFile,thePackageInfo,thePackageAuthor,thePackageVersion,hasHelp
                // use the execute method to allow this to work in Independent Modules
        Execute/P/Q/Z theCmd
    else
                // package parameter is already installed
                // do other things here depending on your package
    endif
    return 0
end