determining size of data

Ken · Joined: 04 Oct 2007 Posts: 7

Hi All,

I have a type as follows

public type Employee
intEmpId as long
sEmpName as string
end type

public emp as Employee

now, i want to know the size of "emp".. is this possible in vb? is it
supports any such function to determine the no of bytes occupied by a "type?"

Thanks

Archived from group: microsoft>public>vb>syntax

Norm Cook · Joined: 04 Oct 2007 Posts: 418

"Ken" wrote in message@microsoft.com...
> Hi All,
>
> I have a type as follows
>
> public type Employee
> intEmpId as long
> sEmpName as string
> end type
>
> public emp as Employee
>
> now, i want to know the size of "emp".. is this possible in vb? is it
> supports any such function to determine the no of bytes occupied by a
"type?"
>
> Thanks

Debug.Print Len(emp)
Note that this is the length of the structure/udt, 4 for the long & 4 for
the string

Jim Mack · Joined: 04 Oct 2007 Posts: 735

Ken wrote:
> Hi All,
>
> I have a type as follows
>
> public type Employee
> intEmpId as long
> sEmpName as string
> end type
>
> public emp as Employee
>
> now, i want to know the size of "emp".. is this possible in vb? is it
> supports any such function to determine the no of bytes occupied by a
> "type?"

What Norm said, but remember that Len() here gives you the length of the string pointer only, not including any string body. In other words, Len() doesn't tell you the length of the data if you write a variable of that type to a file.

--
Jim Mack
MicroDexterity Inc
www.microdexterity.com

Bob Butler · Joined: 04 Oct 2007 Posts: 1081

"Jim Mack" wrote in message @TK2MSFTNGP06.phx.gbl...
>Ken wrote:
>> Hi All,
>>
>> I have a type as follows
>>
>> public type Employee
>> intEmpId as long
>> sEmpName as string
>> end type
>>
>> public emp as Employee
>>
>> now, i want to know the size of "emp".. is this possible in vb? is it
>> supports any such function to determine the no of bytes occupied by a
>> "type?"
>
>What Norm said, but remember that Len() here gives you the length of the
>string pointer only, not including any string >body. In other words, Len()
>doesn't tell you the length of the data if you write a variable of that
>type to a file.

also that it gives the length when used in file i/o operations and not the
actual length in memory;for that use LenB

type x
a as integer
b as long
end type

Len=6
LenB=8 because 2 padding bytes are inserted after the Integer to dword align
the Long

Ken · Joined: 04 Oct 2007 Posts: 7

Hi All

LenB() works!!

Thanks for reply.

"Norm Cook" wrote:

> "Ken" wrote in message
> @microsoft.com...
> > Hi All,
> >
> > I have a type as follows
> >
> > public type Employee
> > intEmpId as long
> > sEmpName as string
> > end type
> >
> > public emp as Employee
> >
> > now, i want to know the size of "emp".. is this possible in vb? is it
> > supports any such function to determine the no of bytes occupied by a
> "type?"
> >
> > Thanks
>
> Debug.Print Len(emp)
> Note that this is the length of the structure/udt, 4 for the long & 4 for
> the string
>
>
>
>