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Get large binary file's MD5 checksum using VB6

Posted on 2009-07-02
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Last Modified: 2012-05-07
How can I get the MD5 checksum of a Binary file, could you please provide the code and would really appreciate if this is not a DLL in VB6.
There are examples in Internet but only from strings and I need for large binaries files.
If a binary file is open like string, the String Doesn't Store Some Characters.

Examples of strings:
http://www.frez.co.uk/freecode.htm#md5
http://www.eggheadcafe.com/community/aspnet/8/11575/this-code-was-put-out-by.aspx


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Question by:jotache
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by:advfinance
ID: 24764952
We've used this ActiveX DLL to do the same thing - It works fast and is very easy to use:

http://xstandard.com/en/documentation/xmd5/

Cheers
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by:jotache
ID: 24765308
I know there are many dll's but I need the code in Visual Basic 6, Thank You.
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advfinance earned 500 total points
ID: 24783369
From experience, it can be done in VB6, but when I tried this on a dual-core 3Ghz machine with 2GB ram, it's so slow it's unusable from a practical point of view. I was using it on MP3s which are recorded calls, and were 2Mb or less.

Still, have a look at this - It contains a function you can pass a filename to, and then pass the resulting string to the function to create the MD5:

http://www.bullzip.com/md5/vb/md5-vb-class.htm

Unless this bit of code's changed since I first looked at it, using a DLL (at least one not written with VB) is faster.
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