Ignoring the debug strings, it’s easier to see that the buffer handling is incorrect. I would suggest also outputting the return values from MsiGetPropertyA() and the value in dwValue to confirm, but here’s what I think is happening (comments refer to dwValue): char szBuff[1024]; DWORD dwValue = 0; MsiGetPropertyA(hInstall, “UPGRADINGPRODUCTCODE”, szBuff, &dwValue); // passes 0, … Read more
Here’s the real scoop: A service is a service is a service. That’s my motto. What I mean by that is I don’t care if you are using a C++ EXE, a VB exe, a C# EXE, some thunking host EXE such as SrvAny.exe… they all implement the same API’s to interact with the service … Read more
No Silver Bullet There is no silver bullet when it comes to automating installation or uninstallation – but there is a quick trick that is described in the “General Uninstall” section. There are heaps of different flavors of installer types – and the list keeps growing. Automating them is a bit of a black art … Read more
You will have to create your own custom prerequisite. Just look at all the settings for 4.6, copy them to the new prerequisite and modify accordingly (e.g. registry entries, file paths etc.) to reflect the new version. To verify registry entries and file paths, you will need to have .NET 4.7 installed on a test … Read more
I am just wondering what your overall goal is (several options could apply): Is the goal to prevent regular users from running the application? (if so, you could make elevation required for running – not great, but should work. Regular users would be asked for admin password on application launch. If they don’t have it, … Read more
I don’t have time to test the options I list below, but they should be viable, technical possibilities. Hopefully one of the options will be satisfactory. But, first of all: I dislike this approach of setting secondary, top-level directories – is it really needed? Can you explain the scenario? Maybe there is a more reliable … Read more
INSTALLED should be Installed. Properties are case sensitive and you must definitely fix that in your condition – or else that part of the condition will never be true – even if the product is installed. The rest of the condition looks OK actually. Just some ideas to determine what is wrong: WiX Source Element: … Read more
ProductCode identifies a particular product. It changes every time you ship a new replacement product. UpgradeCode defines a series of products by using the same UpgradeCode in a updated products whose versions are expected to continually increase. By default, new product versions replace older product versions with a major upgrade. Because upgradecode defines a product … Read more
No, what you ask for is impossible. You can’t modify a file without invalidating it’s signature. That’s the whole point of signing. You also can’t sign a file without having the private key to perform the signing.
According to MSDN, You can uninstall it using the product code: msiexec.exe /x {your-product-code-guid} When you use the product code, it uses the cached MSI from C:\WINDOWS\Installer.