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подскажи как сделать вот это »

Пример

Код:

[Setup]
AppName=My Program
AppVerName=My Program v 1.5
DefaultDirName={pf}\My Program
OutputDir=.
Compression=lzma/ultra
InternalCompressLevel=ultra
SolidCompression=yes

[Languages]
Name: rus; MessagesFile: compiler:Languages\Russian.isl

[Files]
Source: compiler:Examples\MyProg.exe; DestDir: {app}; Flags: ignoreversion

[Registry]
Root: HKLM; Subkey: Software\My Program; ValueType: string; ValueName: InstallPath; ValueData: {app}; Flags: uninsdeletekey

[Code]
function InitializeSetup: Boolean;
var
  path: string;
  res: Integer;
begin
  Result:= True;
  if RegValueExists(HKLM, 'Software\My Program', 'InstallPath') then
    if RegQueryStringValue(HKLM, 'Software\My Program', 'InstallPath', path) then
      if FileExists(path + '\MyProg.exe') then
  if MsgBox('Запустить My Program?', mbConfirmation, MB_YESNO) = IDYES then
    begin
      Exec(path + '\MyProg.exe', '', '', SW_SHOW, ewWaitUntilTerminated, res);
      Result:= False;
    end;
end;