inno-setup - Inno Setup - 检测另一个进程何时为特定任务自动运行(卸载)安装程序

Question

我在自定义 UninstallProgressForm ( Custom Uninstall page (not MsgBox) ) 中使用此代码来定义卸载后的消息(没有原始卸载程序消息):

procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
  case CurUninstallStep of
    usPostUninstall:
      if not WizardVerySilent and UninstallSilent then begin
        MsgBox(CustomMessage('UninstallComplete'), mbInformation, MB_OK);
      end;
  end;
end;

我想在卸载以前的版本(如果存在)时的某个特定时刻隐藏此消息。为了卸载以前的版本，我使用以下代码:How to detect old installation and offer removal? 。我已经用此代码修改了上一个链接的代码，以运行卸载程序(如果有以前的版本):Executing UninstallString in Inno Setup

Answer 1

当您执行卸载以前的版本时，向卸载程序添加自定义开关。就像/UPDATE:

Exec(UninstallPath, UninstallParams + ' /UPDATE', '', SW_SHOW,
     wWaitUntilTerminated, iResultCode)

然后检查开关:

procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
  case CurUninstallStep of
    usPostUninstall:
      if UninstallSilent and (not WizardVerySilent) and 
         (not CmdLineParamExists('/UPDATE')) then
      begin
        MsgBox(CustomMessage('UninstallComplete'), mbInformation, MB_OK);
      end;
  end;
end;

---

CmdLineParamExists 函数来自Passing conditional parameter in Inno Setup .