How to add DLL function into Inno Setup iss file?

Question

I tried to read sample code for how to load DLL at Inno Setup, but I\'m confused.

I have one DLL (ChkArchInfo.dll) and the contents is simple:

Answer 1

Read the Inno Setup documentation on Using DLLs and .NET assemblies.

You primarily have to declare an external function prototype. And add the DLL to the [Files] section, if you want to embed the DLL into the installer.

[Files]
Source: "MyDll.dll"; Flags: dontcopy

[Code]
function IsARM: Boolean;
  external 'IsARM@files:MyDll.dll stdcall';

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Though it would be better to call the GetNativeSystemInfo from Pascal Script directly. But that's a different question.