; AppDataTest.iss
[Setup]
AppName=AppData Test
AppVerName=AppData Test 0.1
DefaultDirName={pf}\AppDataTest
DefaultGroupName=AppDataTest
OutputDir=Setup

[Files]
Source: AppDataTest.iss;  DestDir: {app}\;
Source: AppDataTest.iss;  DestDir: {code:DefAppDataFolder}\AppDataTest\;

[Tasks]
Name: common; Description: "&All users"; GroupDescription: "Install For:"; Flags: exclusive unchecked
Name: local;  Description: "Just &me"; GroupDescription: "Install For:"; Flags: exclusive

[Icons]
Name: {group}\Uninstall AppDataTest; Filename: {uninstallexe}

[Code]
function DefAppDataFolder(Param: String): String;
begin
  if IsTaskSelected('common') then
    Result := ExpandConstant('{commonappdata}')
  else
    Result := ExpandConstant('{localappdata}')
end;