Question

How to write install path to registry after install is complete with Inno sSetup？

Thanks in advance!

Answer 1

Like TLama said, you can achieve it via ssPostInstall if you want the key to be added after the installation process is complete.

[Code]
procedure CurStepChanged(CurStep: TSetupStep);
begin
  if CurStep=ssPostInstall then begin
     RegWriteStringValue(HKEY_LOCAL_MACHINE, 'Software\HHSTECH',
    'InstallPath', ExpandConstant('{app}'));
  end;
end;

Or you can use AfterInstall that will be called after the last files is installed (copied).

[Files]
Source: ".\THEVERYLASTFILE.XXX"; DestDir: "{app}"; AfterInstall: MyAfterInstall

[Code]
procedure MyAfterInstall();
begin
     RegWriteStringValue(HKEY_LOCAL_MACHINE, 'Software\HHSTECH',
    'InstallPath', ExpandConstant('{app}'));
end;