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.

*"there are a lot of results including some located in C:\Windows\SysWow64 and C:\Windows\System32"* - What what you need to now first, if the WAMP needs 32-bit or 64-bit redistributables. — Martin Prikryl, Feb 23 '17 at 15:13
@MartinPrikryl it is 64-bit redistributables. I will edit the question. — Dale Julian, Feb 23 '17 at 15:27

score 2 · Accepted Answer · answered Feb 24 '17 at 13:42

2

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.

answered Feb 24 '17 at 13:42

Slappy

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how can I incorporate this into Inno-Setup? – Dale Julian Feb 27 '17 at 05:22
E.g.: http://stackoverflow.com/questions/24574035/how-to-install-microsoft-vc-redistributables-silently-in-inno-setup?rq=1 – Slappy Feb 27 '17 at 13:06

score 0 · Answer 2 · answered Feb 23 '17 at 15:33

Check if there's a copy of the MSVCR100.dll in the C:\Windows\System32.

As the Inno Setup is a 32-bit application, you will actually need to check the C:\Windows\sysnative. For 32-bit applications, the C:\Windows\System32 is redirected to the C:\Windows\SysWow64

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

2 Answers2