how to access finger print attendance device from c#?

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Dear Friends,

In my application, i need to access fingerprint device and get everyday attendance for the employees. So please anyone guide me how to connect and access the device by using VS 2008 and C#.

I have some dll file's like 1. commpro.dll 2. comms.dll 3. msvcr70.dll 4.msvcr71.dll 5.rsagent.dll 6.rsagentlst.dll 7.rscagent.dll 8.rscomm.dll 9.zkemkeeper.dll and 10.zkemsdk.dll. but i try to add those into references, i got error and i could not add those dll to my application.

Note:
our client purchasing ESSL's X990 fingerprint device they(company) won't have software kit instead of give some dll files. what will i do next?

Posted 26-Mar-13 4:21am

Nathansathya

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OriginalGriff · Answer 1 · 2013-03-26T04:33:00

Probably, the files you have are not .NET assemblies, but plain old vanilla DLL files. You do not access them by adding references, instead you have to use P/Invoke to access the DLL methods.
MSDN: P/Invoke to DLL[^]

It might be an idea to talk to the hardware manufacturer - they may have the function prototypes available, or even a .NET wrapper class if you are lucky.