Считать значение REG_MULTI_SZ параметра реестра

Delphi , ОС и Железо , Реестр

Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

uses
   Registry;

 procedure ReadREG_MULTI_SZ(const CurrentKey: HKey; const Subkey, ValueName: string;
   Strings: TStrings);
 var
   valueType: DWORD;
   valueLen: DWORD;
   p, buffer: PChar;
   key: HKEY;
 begin
   // Clear TStrings 
  // TStrings leeren 
  Strings.Clear;
   // open the specified key 
  // CurrentKey Schlussel offnen 
  if RegOpenKeyEx(CurrentKey,
                   PChar(Subkey),
                   0, KEY_READ, key) = ERROR_SUCCESS then
   begin
     // retrieve the type and data for a specified value name 
    // Den Typ und Wert des Eintrags Ermitteln. 
    SetLastError(RegQueryValueEx(key,
                  PChar(ValueName),
                  nil,
                  @valueType,
                  nil,
                  @valueLen));
     if GetLastError = ERROR_SUCCESS then
       if valueType = REG_MULTI_SZ then
       begin
         GetMem(buffer, valueLen);
         try
           // receive the value's data (in an array). 
          // Ein Array von Null-terminierten Strings 
          // wird zuruckgegeben 
          RegQueryValueEx(key,
                           PChar(ValueName),
                           nil,
                           nil,
                           PBYTE(buffer),
                           @valueLen);
           // Add values to stringlist 
          // Werte in String Liste einfugen 
          p := buffer;
           while p^ <> #0 do
           begin
             Strings.Add(p);
             Inc(p, lstrlen(p) + 1)
           end
         finally
           FreeMem(buffer)
         end
       end
       else
         raise ERegistryException.Create('Stringlist expected/ String Liste erwartet...')
     else
       raise ERegistryException.Create('Cannot Read MULTI_SZ Value/'+
         'Kann den MULTI_SZ Wert nicht lesen...');
   end;
 end;

 // Test it, Testen: 

procedure TForm1.Button1Click(Sender: TObject);
 begin
   ReadREG_MULTI_SZ(HKEY_CURRENT_USER, 'Software\XYZ', 'Test44', Memo1.Lines);
 end;

 {******************************************}
 {2. by Ralph Friedman }

 { 
 Question: 
 I want to read out the binary-value "problems" of the path 
 HKEY_DYN_DATA\Config Manager\Enum\[add the key of a hardware component] to 
 detect if a hardware component is troubled and not working right. 
 But I cannot handle the ReadBinaryData-Method of TRegistry correct. 
 Everytime I use it, it always returns "4" as content of the buffer. 
 How do I detect if the content of the binary-key "problems" is 
 not "00 00 00 00" but something else like "16 00 00 00" or such? 
}

 {Answer: Here's an example of ReadBinaryData }


 procedure TFrmReadBinary.Button1Click(Sender: TObject);
 const
   CKeyName: string = 'System\Setup';
   CValName: string = 'NetcardDlls';
 var
   keyGood: boolean;
   p: integer;
   regKey: TRegistry;
   tmpStr: string;
   vSize: integer;
 begin
   regKey := TRegistry.Create;
   try
     regKey.RootKey := HKEY_LOCAL_MACHINE;
     keyGood  := regKey.OpenKey(CKeyName, False);

     if (keyGood) then
     begin
       vSize := regKey.GetDataSize(CValName);

       if (vSize > 0) then
       begin
         SetLength(tmpStr, vSize);
         regKey.ReadBinaryData(CValName, tmpstr[1], vSize);

         repeat
           p := Pos(#0, tmpStr);

           if p <> 0 then
           begin
             Delete(tmpStr, p, 1);
             Insert(#13#10,tmpStr,p);
           end;
         until p = 0;

         (*StringReplace(tmpStr, #0, #13#10,[rfReplaceAll]);*)

         ListBox1.Items.Text := tmpStr;
       end;
     end;
   finally
     regKey.Free;
   end;
 end;

 {******************************************}
 {3. by Michael Winter }

 procedure RaiseWin32Error(Code: Cardinal);
 var
   Error: EWin32Error;
 begin
   Error := EWin32Error.CreateResFmt(@SWin32Error, [Code,
     SysErrorMessage(Code)]);
   Error.ErrorCode := Code;
   raise Error;
 end;

 // Write REG_MULTI_SZ 
procedure TForm1.Button1Click(Sender: TObject);
 const
   Str = 'multiple'#0'strings'#0'in one'#0'registry'#0'value'#0        ;
 var
   Reg: TRegistry;
   Res: Integer;
 begin
   Reg := TRegistry.Create;
   try
     Reg.RootKey := HKEY_CURRENT_USER;
     if not Reg.OpenKey('\Software\Test\RegMultiSzTest', true) then
       raise Exception.Create('Can''t open key');
     Res := RegSetValueEx(
       Reg.CurrentKey,     // handle of key to set value for 
      'TestValue',        // address of value to set 
      0,                  // reserved 
      REG_MULTI_SZ,       // flag for value type 
      PChar(Str),         // address of value data 
      Length(Str) + 1);   // size of value data 
    if Res <> ERROR_SUCCESS then
       RaiseWin32Error(Res);
   finally
     Reg.Free;
   end;
 end;

 // Read REG_MULTI_SZ 
procedure TForm1.Button2Click(Sender: TObject);
 var
   Reg: TRegistry;
   DataType: Cardinal;
   DataSize: Cardinal;
   Res: Integer;
   Str: String;
   i: Integer;
 begin
   Reg := TRegistry.Create;
   try
     Reg.RootKey := HKEY_CURRENT_USER;
     if not Reg.OpenKeyReadOnly('\Software\Test\RegMultiSzTest') then
       raise Exception.Create('Can''t open key');
     DataSize := 0;
     Res := RegQueryValueEx(
       Reg.CurrentKey,     // handle of key to query 
      'TestValue',        // address of name of value to query 
      nil,                // reserved 
      @DataType,          // address of buffer for value type 
      nil,                // address of data buffer 
      @DataSize);         // address of data buffer size 
    if Res <> ERROR_SUCCESS then
       RaiseWin32Error(Res);
     if DataType <> REG_MULTI_SZ then
       raise Exception.Create('Wrong data type');
     SetLength(Str, DataSize - 1);
     if DataSize > 1 then begin
       Res := RegQueryValueEx(
         Reg.CurrentKey,     // handle of key to query 
        'TestValue',        // address of name of value to query 
        nil,                // reserved 
        @DataType,          // address of buffer for value type 
        PByte(Str),         // address of data buffer 
        @DataSize);         // address of data buffer size 
      if Res <> ERROR_SUCCESS then
         RaiseWin32Error(Res);
     end;

     for i := Length(Str) downto 1 do
       if Str[i] = #0 then
         Str[i] := #13;
     ShowMessage(Str);
   finally
     Reg.Free;
   end;
 end;

Статья Считать значение REG_MULTI_SZ параметра реестра раздела ОС и Железо Реестр может быть полезна для разработчиков на Delphi и FreePascal.

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