Inno Setup Calling DLL with string as parameter

Question

I\'m getting a exception when I attempt to use my DLL from the Inno Setup script.

I think the problem is this line in the dll code:

StreamReader sre         


        

Answer 1

I assume you are (correctly) using Unicode version of Inno Setup (in the latest Inno Setup 6, there's only the Unicode version)

In the Unicode version of Inno Setup, string is a wide string. For the wide string, you need to use UnmanagedType.LPWStr, not UnmanagedType.LPStr.

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UnmanagedType.LPStr is an Ansi string – an equivalent of AnsiString in Inno Setup and string in the Ansi version of Inno Setup.

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Though as @mirtheil commented already, replacing a string in a text file can easily be implemented in Pascal Script: Replace a text in a file with Inno Setup.