"Richard Brooks" <richardbro***@vickers-armstrongs.com> wrote in message
news:3_udncnD-J9GWjzUnZ2dnUVZ8s_inZ2d@bt.com...
> I've been searching high and low for the right solution to what should be
> something simple and instead of the what I have read as 'If you pass an
> unsigned value greater than 2,147,483,647 to a LONG variable, the value
> will be interperted as a negarive number.' instead I get the 'value
> overflow' result.
>
> What is the correct method for getting an unsigned LONG value into a VB
> Signed LONG?
>
>
> Many thanks.

> "Richard Brooks" <richardbro***@vickers-armstrongs.com> wrote
>> I've been searching high and low for the right solution to what should
>> be something simple and instead of the what I have read as 'If you
>> pass an unsigned value greater than 2,147,483,647 to a LONG variable,
>> the value will be interperted as a negarive number.' instead I get the
>> 'value overflow' result.
>>
>> What is the correct method for getting an unsigned LONG value into a
>> VB Signed LONG?
>
> Well the trick there is, where are you getting the unsigned long?
>
> You can assign any supported value you want using hexidecimal
> notation:
>
> Z = &HFFFFFFFF
>
> LFS

"Richard Brooks" <richardbro***@vickers-armstrongs.com> wrote in message
news:_c-dndGfKc9whj_UnZ2dnUVZ8h2dnZ2d@bt.com...
> Larry Serflaten said the following on 23/02/2009 00:29:
>> "Richard Brooks" <richardbro***@vickers-armstrongs.com> wrote
>>> I've been searching high and low for the right solution to what should
>>> be something simple and instead of the what I have read as 'If you
>>> pass an unsigned value greater than 2,147,483,647 to a LONG variable,
>>> the value will be interperted as a negarive number.' instead I get the
>>> 'value overflow' result.
>>>
>>> What is the correct method for getting an unsigned LONG value into a
>>> VB Signed LONG?
>>
>> Well the trick there is, where are you getting the unsigned long?
>>
>> You can assign any supported value you want using hexidecimal
>> notation:
>>
>> Z = &HFFFFFFFF
>>
>> LFS
>
> Thanks for the reply (and to Bill McCarthy in other post).
>
> My task is to read in aircraft position data from a file built by a flight
> data recorder, FS recorder programmed by Matthias Neusinger who has kindly
> sent me the subroutines and data formats which is programmed in C which
> IIRC writes in Low Byte Order First, so in a four byte data block, the
> right-hand most byte block is the High Byte value.
>
> I think the problem is now sorted as I was converting and multiplying each
> byte then adding that subtotal value to a Long variable but now, just
> building the byte block and converting it at the end works.
>
> A very many thanks to you both.