File comparison question - Visual Basic 4 / 5 / 6

Bill W.

I'm teaching myself VB6. As a first project, I've decided to work on
a Window's version of the Unix command, "diff" -- with a few twists.
But being unfamiliar with VB, I am unsure as to how to best compare
two files and/or directories.

A byte-by-byte comparison would probably be best but slow, correct?
What about computing a CRC for each file and then compare those. any
faster?
OR
Compare file-sizes, and create/access times. Would that be a reliable
enough comparison?

Any thoughts, comments, suggestions, pointers to sample code, etc.
welcome.

Bill W

Jul 17 '05 #1

Subscribe Reply

3486

J French

On 29 Sep 2003 08:09:00 -0700, bw******@lucent.com (Bill W.) wrote:

I'm teaching myself VB6. As a first project, I've decided to work on
a Window's version of the Unix command, "diff" -- with a few twists.
But being unfamiliar with VB, I am unsure as to how to best compare
two files and/or directories.

A byte-by-byte comparison would probably be best but slow, correct?
What about computing a CRC for each file and then compare those. any
faster? Calculating a CRC involves reading every byte
- there is also (a very small) possibility of errorOR
Compare file-sizes, and create/access times. Would that be a reliable
enough comparison? File sizes are Ok - create/access datetimes are irrelevant
Any thoughts, comments, suggestions, pointers to sample code, etc.
welcome.

Bill W

Jul 17 '05 #2

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