How does this function works?

[Jay]

Hi Guys!
Can anyone help me how does this one works and how to use this function?
Thanks,
Jay


Function VTest(ByRef AMsg As String, ByRef AMsW As Double, ByRef AMsX As
Integer, _
ByRef AMsY As Integer, ByRef AMsZ As Integer, ByRef AMsH As Integer,
ByRef AMsT As Variant)
'Verify ActiveCell and ActiveSheet Selection
'Used by Procedures - Months, Distribute, & Produce
Dim Tmp As Variant, Tmi As Integer

VTest = WWks()
If VTest Then Exit Function
AMsP = AMsk
If IsNumeric(Expression:=ActiveCell.Value) Then
AMsW = ActiveCell.Value
If IsNumeric(AMsW) Then
GoTo Rtest
Else
GoTo Erxis
End If
Else
GoTo Erxis
End If

Erxis:
AMsD = AMsP & AMsg & Chr(13) & Chr(10) & Chr(13) & Chr(10) & AMsc
Beep
Beep
Tmp = vbOKOnly + vbCritical
ARep = MsgBox(prompt:=AMsD, Buttons:=Tmp, Title:=" SELECTION ERROR")
Erxi2:
VTest = True
Exit Function

Rtest:
If ActiveCell.Row = 17 Then GoTo Erxi2
AMsX = ActiveCell.Column
AMsY = ActiveCell.Row
AMsH = 0
If AMsg = MSP Then
Tmp = Application.Lookup(AMsX, vrEITab)
If Tmp <> AMsX Then GoTo Erxis
If AMsX = 5 Then
VTest = False
Exit Function
End If
End If
AMsP = AMso
AMsH = Int((AMsX - AMsZ) / 4)
If AMsX < AMsZ Or AMsX > Range("MaxReqCol").Value Then GoTo Erxis
Tmp = Application.Lookup(AMsY, AMsT)
' If Tmp <> AMsY Then GoTo Erxis
VTest = False
End Function 'Vtest

 

[Tim Williams]

Use it for what ?
It's clearly only a small part of something bigger (and that is some odd
coding style....) - what part is giving you a problem?

Tim

 

[Bob Phillips]

I am disappointed with you Tim.

Given a piece of badly written code with absolutely no context, you fail to
understand what it does, how it does it, and how to use it.

 

[Jay]

Guys, I'd just like to know how does a function works using the code below as
an example coz it is difficult to show its result without any context. So
here's specifically is the thing I wanna know:

- if you use this function to other procedures and declare a variable in it,
does these byref variable be computed first in this function before being
used by other procedure?

Thanks for the help.
jay

 

[Peter T]

Let me re-phrase Bob's light hearted comment and direct it to you.

The code is badly written. As posted it has is no context. It is not
possible for anyone to understand what it is supposed to do, how it does it,
or how to use it. At least not without a lot of effort, second guessing
what's intended and correcting it.

If you are looking at it only as a learning exercise it serves no useful
purpose.

Concerning ByRef, all is explained in VBA Help. Following should show the
difference between ByRef and ByVal

Sub test()
Dim apple As Long, pear As Long, vResult

apple = 3: pear = 5

vResult = foo(apple, pear)

Debug.Print vResult, apple; pear ' 16, 6 5
' notice ByRef apple returns changed but ByVal pear is unchanged

End Sub

Function foo(ByRef a As Long, ByVal b As Long)

a = a * 2
b = b * 2
foo = a + b
End Function

Regards,
Peter T

 

[Jay]

Thanks Peter thats all I need to know. Anyway that code was'nt my work Im
trying to understand how and why he does that.

Thanks you and regards,
Jay