More API for Beginners

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Submitted on: 11/7/2003 3:45:58 PM
By: MrBobo
Level: Beginner
User Rating:

By 5 Users
Compatibility:VB 6.0

Users have accessed this code 649 times.

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Handling File Paths. The VB programmer should try to use the API wherever possible. It is usually faster and more memory efficient than most VB methods. We should also make use of .RES files rather than hard coding to reduce the amount of memory consumed by our applications. This little demo attempts to illustrate these concepts in the simplest possible way.

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Other User Comments

11/7/2003 7:57:52 PM:

I'm luckily to see your code again. 
Thanks to you for your sharing code..!!

11/8/2003 7:58:33 AM:Norm Cook

Thanks for sharing.  However, (1) RES 
files conserve no memory since they are 
compiled into the exe, the same as hard 
coded resources.  Plus there's the 
overhead of the LoadResData/String 
calls.  (2) The PathOnly function in 
your screen shot can be replaced with 
PathOnly = Left$(mPath, InStrRev(mPath, 
"\") - 1), which, on my box is about 10 
times faster & saves resources.

11/8/2003 9:01:55 AM:MrBobo

Norm - No and Yes...
No - Res files DO 
conserve memory usage,"Performance and 
capacity are increased because strings, 
bitmaps, icons, and data can be loaded 
on demand from the resource file, 
instead of all being loaded at once 
when a form or a module is loaded." 
MSDN - and experience.
Yes - there 
is no "PathOnly" function via the API - 
only a FileOnly (PathStripPath) so in 
order to demonstrate API usage I used 
the FileOnly function with a bit of 
parsing.

11/8/2003 9:10:37 AM:MrBobo

Continued...
Normally I would not use 
the API for Pathonly but instead parse 
the path.
The parsing method you 
mention however needs some tweaking - 
"C:\text" for example would return "C:" 
instead of the slightly more preferable 
"C:\". But your point is taken none the 
less. Thanks for the feedback.

11/8/2003 9:16:08 AM:MrBobo

Continued...
As to the speed of 
functionality - normally these sort of 
routines are called once only within a 
Sub/Function and not repeatedly so any 
lag is insignificant. If they exist 
within a loop you should not make calls 
to other functions but include the code 
within the loop itself.

11/9/2003 11:23:57 PM:Roger Gilchrist

5 * just 'cause the demo form is so 
well laid out

11/10/2003 6:46:53 AM:

Simply : EXCELENT
Clear, simply and 
lighting functional.
Five Stars for 
you. Thanks for sharing.

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