@koahnig I don't know who's project the IFW is but could you pass along a request for better documentation? A few times I came across lines like For more information see ##TODO add link

Just my guess, but I would say it's something as simple as popularity? xz is not widely used on Windows and 7z is kinda universally used/recognized at this point so... I'm guessing it's just a coin-flip decision.

It can indeed, see here: http://doc.qt.io/qtinstallerframework/ifw-online-installers.html

Hi, What about submitting your work to the Qt project ?

I have not used IFW, but have you seen this page and this page ? Also, this example may provide some help. Paul

Many thanks @Wieland, but my problem is with the installer script (sorry for not having explained before (-_-)). The application is fine according to the customer feedback. Am trying to check the existence of previous installations and if so, check which version is installed. For this, I have created a registry entry containing the application path and installed version, but I don´t know how to compare the current installation version with the previously installed one. Thanks in advance.

@koahnig I am using 2.0.1

At last I got it to work. The parameter "/reg:64" passed to reg.exe makes it do what it's told. I just hope this won't mess things up on a 32bit windows. So, that needs to be component.addElevatedOperation("Execute",reg, "ADD",key, "/reg:64" ,"/v","@TargetDir@\\maintenancetool.exe","/t","REG_SZ","/d","~ RUNASADMIN", "/f");

You can use "UNDOEXECUTE". For example: component.addOperation("Execute", "msiexec", "/i", "xxx.msi", "/quiet", "UNDOEXECUTE", "msiexec", "/x", "xxx.msi");

@GoranShekerov Tried the above code to stop and remove the windows service while uninstalling from QT installer. But did not work function Controller() { installer.uninstallationStarted.connect(onUninstallationStarted); } onUninstallationStarted = function() { if (installer.isUninstaller()) { installer.performOperation("Execute", "@TargetDir@/platform/tools/Server/testServer.exe", "stop"); console.log("Server stopped") installer.performOperation("Execute", "@TargetDir@/platform/tools/Server/testServer.exe", "remove"); console.log("Server removed") } }

Solution: Controller.prototype.IntroductionPageCallback = function() { // Installer is "updater" when it is run with "--updater" // or Controller does "installer.setUpdater()" if (installer.isUpdater()) { var widget = gui.currentPageWidget(); // Same as gui.pageById(QInstaller.Introduction); widget.findChild("UpdaterRadioButton").checked = true; // Disable paint events on these widgets, through the QWidget::updatesEnabled property. // I tried with the "visible" property, but it is not enough, because for some reason // that property gets reset under some conditions. For example, if "Next" button is pressed // and no updates are available. widget.findChild("PackageManagerRadioButton").updatesEnabled = false; widget.findChild("UninstallerRadioButton").updatesEnabled = false; } }