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And so you get neither advantage: instead of static linking and only including functions needed by your program, you effectively static-link to the entire library, except with all the mess of the dynamic link, and instead of having only one instance in memory, they are all in memory, in their entirety. In reality, everybody dynamically links to whatever random library version was current when they installed Visual Studio, which apparently changes every few months. Also, in theory, multiple programs can link to the same library and so only one instance of it needs to be dealt with. This is reliable, but very slow (40+ sec), since it looks like it has to load all products installed on the system before it returns results.The idea is that programs using the standard C library can gain from security fixes later issued, without having to update the program itself. Use WMI/check system tables using wmic product get or new ManagementObjectSearcher("SELECT * FROM Win32_Product").This is the case for HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall, HKLM\SOFTWARE\Microsoft\VisualStudio\12.0\VC, and HKLM\SOFTWARE\Wow6432Node\Microsoft\DevDiv\VC.
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Check the registry: This is not an option because, if Visual Studio is installed or Visual C++ has been removed, you get false positives.I've looked through answers here, here, and here, but it looks like all of the answers fall into two major categories: I'm trying to have my application determine whether or not Microsoft Visual C++ 2013 Redistributable has been installed on the user's system.
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