Hello ladies and gents.
I've been busy the past few days creating a very complex (for me) .NET application in C#. I want to talk about an issue that I banged my head on for a few hours, because the solution is out there and easy to find on the internet, but every person who posted the answer on a forum or MSDN article was making an assumption that I knew something already that I didn't know in order to arrive at the solution, and so that missing piece of knowledge was keeping me from joining the ranks of those who knew how to solve this problem. What can I say, I'm a novice programmer.
I'm using Visual Studio 2010, and I have created a C# project. I'm using Windows 7 64bit. This project that I have created has the word "install" in the name. Apparently, any time that Windows Vista or 7 see the user executing a program that has the word "setup" or "install" in it, it triggers something deep within the bowels of Windows to cough up this incisive message:
*Thank you that's very helpful now go away*
I don't like the principle behind this behavior. I have read that this box will only pop up if you have the magic word in your executable name and that executable does not add an entry to the Add/Remove Programs list by the time it exits, which could indicate a failed installation. Or it could indicate nothing went wrong at all, which from my experience is the case 100% of the time. In fact I'd be scared to hit that "Reinstall using recommended settings" button, because I definitely have no idea what that might do. Furthermore I've read that some install applications do put a new entry in the Add/Remove Programs list and yet it still generates this popup.
I've been using Windows Vista and Windows 7 for a long time, and I have never once found this to be helpful in any way. But now this behavior has really gone and annoyed me by popping up every time I test during my development.
So I started researching the problem and I was immediately led to believe that this could be easily solved by editing the manifest file in my application's project in Visual Studio. Here is what you add to your manifest file to make it not show that Program Compatibility popup:
<!--The ID below indicates application support for Windows Vista -->
<!--The ID below indicates application support for Windows 7 -->
OK... I can't find my manifest file. I've looked through all the menus and tabs and buttons here in Visual Studio... hrm... maybe I just need to edit this installer.manifest file that's sitting in the same output directory as my application and then rebuild it! Nope, that didn't work. It just seems to wipe out my changes and revert the file to default every time I build the solution... my project settings were set to "Embed manifest with default settings." So even though the default manifest was there in the output directory, any modifications you make to it just get wiped out.
Finally, I realized that I just need to generate a new manifest file for myself. In the Solution Explorer pane, right-click your project and choose "Add --> New Item..." and add an "Application Manifest File." It should pop up under the Resources folder in your project, whether you already had one or not. Now you can edit that manifest to your heart's content, and the changes will not get wiped out. You'll notice that the section of XML I pasted above sort of already exists in your new manifest file, so just use your head and paste in only the couple of relevant lines in the right places. ;) You will also notice that if you go back to your Project's properties, you should see it pointing at the manifest file you just created, instead of saying "Embed manifest with default settings."
No more "Program Compatibility Assistant" popup! I feel like an idiot sometimes...
Now that you know about creating and editing your own application manifest file, you are well on your way to doing other things with it, such as having the application request its own administrator access from UAC, instead of, say, simply checking to see whether the current user is an administrator or not, and then having the application say "Sorry, you're not an administrator so I won't run. Please try executing the program again by right-clicking on my icon and choosing 'Run as administrator...'" Which unfortunately I have seen too many times. Follow up with this article.