Inno Setup how to check if MSVCR100.dll exists on the system

Question

I have an Inno Setup-based installer that also includes a WAMP installer inside it. Installing WAMP on some systems requires the installation for Microsoft Visual C++ Redistributables and I have those executables for those redistributables in my installer as well. Although, I want to check first if the system already has the MSVCR100.dll installed already so I would not need to launch those installers anymore. Any way on how to locate the MSVCR100.dll on the system using Inno-Setup?

I have tried searching the "MSVCR100.dll" in C:\ but there are a lot of results including some located in C:\Windows\SysWow64 and C:\Windows\System32

Note: We will only use 64-bit installation of wAMP, so we only need to find a way to locate the 64-bit redistributables. We can disregard the 32-bit for now.

Answer 1

Instead of detecting this .dll file simply run the redistributables setup file again:

https://blogs.msdn.microsoft.com/astebner/2010/10/20/mailbag-how-to-perform-a-silent-install-of-the-visual-c-2010-redistributable-packages/

Running this setup twice will not harm the machine - if the redistributables are already installed nothing bad happens.