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unit RegExpo;
 
 interface
 
 uses
   Windows, rRegistry, Classes, SysUtils;
 
 {$I-}
 {$LONGSTRINGS ON}
 
 { 
  Regexpo 
 
  Author : Arthur Hoornweg (arthur.hoornweg@email.de) 
  Version : 1.00, May 1998 
  O/S : Windows 95, 98, ME, NT, 2000, XP 
        Delphi 2+ 
  Function : 
    This unit allows you to backup a branch of the registry into a *.REG file, 
    that is compatible with "regedit". 
    Double-clicking such a file in the explorer will import it. 
 
 
  Example: 
    ExportRegistryBranch(HKEY_LOCAL_MACHINE,'SOFTWARE\Borland\Delphi','A:\DELPHI.REG') 
 
  (c) 1998 A.M. Hoornweg. All rights reserved. 
 
  You may use this software for all purposes, both commercial and 
  noncommercial, as long as proper credit is given. The sourcecode may be distributed 
  freely, as long as this copyright is included and no more than a marginal fee is 
  asked. 
 
 
  Disclaimer: 
 
  I accept no responsibility whatsoever for any damages caused by these 
  routines. Use them at your own risk. If you find any bugs, please let me know. 
}
 
 
 procedure ExportRegistryBranch(Rootsection: Integer; regroot: string;
   FileName: string);
 
 implementation
 
 function dblBackSlash(t: string): string;
 var
   k: longint;
 begin
   Result := t; {Strings are not allowed to have}
   for k := Length(t) downto 1 do {single backslashes}
     if Result[k] = '\' then Insert('\', Result, k);
 end;
 
 
 procedure ExportRegistryBranch(rootsection: Integer; Regroot: string;
   FileName: string);
 var
   reg: TRegistry;
   f: Textfile;
   p: PChar;
 
   procedure ProcessBranch(root: string); {recursive sub-procedure}
   var
     values, keys: TStringList;
     i, j, k: longint;
     s, t: string; {longstrings are on the heap, not on the stack!}
   begin
     Writeln(f); {write blank line}
     case rootsection of
       HKEY_CLASSES_ROOT: s   := 'HKEY_CLASSES_ROOT';
       HKEY_CURRENT_USER: s   := 'HKEY_CURRENT_USER';
       HKEY_LOCAL_MACHINE: s  := 'HKEY_LOCAL_MACHINE';
       HKEY_USERS: s          := 'HKEY_USERS';
       HKEY_PERFORMANCE_DATA: s := 'HKEY_PERFORMANCE_DATA';
       HKEY_CURRENT_CONFIG: s := 'HKEY_CURRENT_CONFIG';
       HKEY_DYN_DATA: s       := 'HKEY_DYN_DATA';
     end;
     Writeln(f, '[' + s + '\' + root + ']'); {write section name in brackets}
 
     reg.OpenKey(root, False);
     try
       values := TStringList.Create;
       try
         keys := TStringList.Create;
         try
           reg.GetValuenames(values); {get all value names}
           reg.GetKeynames(keys); {get all sub-branches}
 
           for i := 0 to values.Count - 1 do {write all the values first}
           begin
             s := values[i];
             t := s; {s=value name}
             if s = '' then s := '@' {empty means "default value", write as @}
             else
               s := '"' + s + '"'; {else put in quotes}
             Write(f, dblbackslash(s) + '='); {write the name of the key to the file}
 
             case reg.Getdatatype(t) of {What type of data is it?}
 
               rdString, rdExpandString: {String-type}
                 Writeln(f, '"' + dblbackslash(reg.ReadString(t) + '"'));
 
               rdInteger: {32-bit unsigned long integer}
                 Writeln(f, 'dword:' + IntToHex(reg.readinteger(t), 8));
 
              {write an array of hex bytes if data is "binary." Perform a line feed 
              after approx. 25 numbers so the line length stays within limits}
 
               rdBinary:
                 begin
                   Write(f, 'hex:');
                   j := reg.GetDataSize(t); {determine size}
                   GetMem(p, j); {Allocate memory}
                   reg.ReadBinaryData(t, p^, J); {read in the data, treat as pchar}
                   for k := 0 to j - 1 do
                   begin
                     Write(f, IntToHex(Byte(p[k]), 2)); {Write byte as hex}
                     if k <> j - 1 then {not yet last byte?}
                     begin
                       Write(f, ','); {then write Comma}
                       if (k > 0) and ((k mod 25) = 0) {line too long?} then
                         Writeln(f, '\'); {then write Backslash +lf}
                     end; {if}
                   end; {for}
                   FreeMem(p, j); {free the memory}
                   Writeln(f); {Linefeed}
                 end;
               else
                 Writeln(f, '""'); {write an empty string if datatype illegal/unknown}
             end;{case}
           end; {for}
         finally
           reg.CloseKey;
         end;
 
       finally
         {value names all done, no longer needed}
         values.Free;
       end;
 
       {Now al values are written, we process all subkeys}
       {Perform this process RECURSIVELY...}
       for i := 0 to keys.Count - 1 do
         ProcessBranch(root + '\' + keys[i]);
     finally
       keys.Free; {this branch is ready}
     end;
   end; { ProcessBranch}
 
 
 begin
   if RegRoot[Length(Regroot)] = '\' then {No trailing backslash}
     SetLength(regroot, Length(Regroot) - 1);
   Assignfile(f, FileName); {create a text file}
   Rewrite(f);
   if ioResult <> 0 then Exit;
   Writeln(f, 'REGEDIT4'); {"magic key" for regedit}
 
   reg := TRegistry.Create;
   try
     reg.Rootkey := Rootsection;
     {Call the function that writes the branch and all subbranches}
     ProcessBranch(Regroot);
   finally
     reg.Free; {ready}
     Close(f);
   end;
 end;
 
 end.

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