Can I add fkattend.dll in C# reference?

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FKAttend.DLL not add in c# reference;

And C#[DLLImport] Couldnt find `FKAttend.DLL`
have any solution about it or dependency

What I have tried:

[DllImport("FKAttend.dll", CharSet = CharSet.Ansi)]
        public static extern int FK_ConnectComm(
            int anMachineNo, 
            int anComPort, 
            int anBaudRate, 
			string astrTelNumber, 
            int anWaitDialTime, 
            int anLicense, 
            int anComTimeOut);

Posted 15-Mar-17 21:15pm

Member 10404056

Updated 15-Mar-17 22:36pm

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Graeme_Grant 16-Mar-17 3:18am

This Google Search should find what you are looking for: how to add unmanaged dll in c#[^]

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OriginalGriff · Answer 1 · 2017-03-15T22:36:00

FKAttend.dll is not a system DLL, it is part of a fingerprint recognition system (and is presumably proprietary to the manufacturer of the system).
As a result, it isn't likely to be in an "obvious place" that the system will search: Start by locating it, copying it to your project folder and adding it to your project so it ends up in your BIN folders.

That way, the system has a better chance of finding it! The rules for DLL searching are here: Dynamic-Link Library Search Order (Windows)[^]

If that doesn't work, check your app settings: if the DLL is a 32 bit file and your app is 64 (or vice versa) it could cause a similar problem.