[Schabik]

Originally Posted by HunterEmrah

how can i apply custommessage for Main files component ?

Script.iss

function TranslateComponentName(StrName: String): String;
begin
  case Trim(Uppercase(Copy(StrName, Pos('cm:', LowerCase(StrName)) + Length('cm:'), Length(StrName)))) of
    'EN', 'ENGLISH'   : Result := CustomMessage('CompEnglish');
    'FR', 'FRENCH'    : Result := CustomMessage('CompFrench');
    'DE', 'GERMAN'    : Result := CustomMessage('CompGerman');
    'IT', 'ITALIAN'   : Result := CustomMessage('CompItalian');
    'ES', 'SPANISH'   : Result := CustomMessage('CompSpanish');
    'PL', 'POLISH'    : Result := CustomMessage('CompPolish');
    'RU', 'RUSSIAN'   : Result := CustomMessage('CompRussian');
    'BR', 'BRAZILIAN' : Result := CustomMessage('CompPortugueseBrazil');
    'MX', 'MEXICAN'   : Result := CustomMessage('CompMexican');
    'CZ', 'CZECH'     : Result := CustomMessage('CompCzech');
    'CL', 'COMPLAN'   : Result := CustomMessage('CompLan');
    'CB', 'COMPBONUS' : Result := CustomMessage('CompBonus');
    'GC', 'COMPMAIN'  : Result := CustomMessage('CompMain');
    else
      Result := StrName;
  end;
end;

 ComponentsSize := 0;
  SetArrayLength(CompIndexList, 0);
  IniFile := ExpandConstant('{tmp}\Settings.ini');
  ComponentsPageAvai := GetIniBool('ComponentsSettings', 'Enable', False, IniFile);
  if ComponentsPageAvai then
  begin
    if IniKeyExists('ComponentsSettings', 'Component' + IntToStr(I) + '.Name', IniFile) then
    begin
      CompName := 'cm:COMPMAIN';
      ComponentsList.AddCheckBox(CompName, '', 0, True, False, True, True, nil);
    end;

CustomMessages.iss

English.CompMain=Main files

also tried to type {cm:CompMain} for CompName, doesn't working

You have to add to function TranslateComponentName this line

'CM', 'COMPMAIN' : Result := CustomMessage('CompMain');

Or like you did:

 
'GC', 'COMPMAIN'  : Result := CustomMessage('CompMain');

Then to settings.ini cm:CM or cm:GC OR cm:COMPMAIN as the name for the component, just remember to use capital letters after "cm:"

And of course like as You added to CustomMessages.iss

English.CompMain=Main files

As an advice, try to translate the components names to other languages if the installer is multilang, it will be helpful for others who will use it to unpack the game