Public question - how to make app more quality

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Guest

How to make APP with more quality - you know THE PROBLEM when some pipl eneter letters in combobox where he shold put number. i know for validation rules ... but is there any free on line book or some thing witch guide you as a programer to chack all most common error problems

thanks in advanc

Vojisla
 
In My experience its been a matter of trial and error.
I don't know of any online book, the best way is to do a search on
google for whatever you're trying figure out.
For instance for your example you could look for the "IsNumeric"
built-in function, and you'll find lots of example code Eg.

If Not IsNumeric(mb) then MsgBox("You must enter a number") : Exit Sub

(where mb is the return value of a MsgBox, or any other string that
the user has typed in)

Once it get past that check, you could make it even more specific
like:
if mb<0 then msgbox ("please enter a positive value")

Scott
 
i know , but when i make app i need some list of most common errors in app, like ' check all your combbox who receve number to check isnumerc... than chack all your .... something like tha

thank
 
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