More FFI Help with long buffers

> Hello all,
>
> I've been having some trouble with an api call.  I need to send in a long
> value as a buffer.  
>
> I've tried a few things.
> 1: just using an external address allocated to 4 bytes using an integer
> address.
>
> MyExtFunc >> withBuffer: aBuffer
>
> <apicall: bool 'MyAPICall' (long) module: 'my.dll'>
>
> ------------------
>
> MyExtFunc >> callWithBuffer
>
> aBuffer := ExternalAddress allocate: 4.
>
> self withBuffer: aBuffer getHandle asInteger.
>
> -------------------
>
> 2: Using a pointer to ExternalAddress
> MyExtFunc >> withBuffer: aBuffer
>
> <apicall: bool 'MyAPICall' (ExternalAddress*) module: 'my.dll'>
>
> --------------------
>
> MyExtFunc >> callWithBuffer
>
> aBuffer := ExternalAddress allocate: 4.
>
> self withBuffer: aBuffer
>
> -------------------
> 3: Creating external structure that holds a long
>
> MyExtFunc >> withBuffer: aBuffer
>
> <apicall: bool 'MyAPICall' (Win32LongBuffer*) module: 'my.dll'>
>
> -------------------
>
> MyExtFunc >> callWithBuffer
>
> aBuffer := Win32LongBuffer new buffer: 0; yourself
> aBuffer setHandle: (ExternalAddress allocate: 4).
>
> self withBuffer: aBuffer
>
>
> -------------------
> 4: I tried the Win32LongBuffer as (long) with aBuffer getHandle asInteger
> -------------------
> 5: I tried ExternalData using Cees method:
>
> argBuf _ ByteArray new: 4.
> argBuf longAt: 1 put: 0 bigEndian: false.
> argPtr _ ExternalData fromHandle: argBuf type: ExternalType long
> asPointerType.
>
> -------------------
> 6: extData := ExternalData fromHandle: (ptr := ExternalAddress allocate: 4)
> type: ExternalType long [asPointerType]
>
> Sending in the handle of the extData or the ptr and I tried both as integer.
>
>
> So far nothing is working.  I believe that the problem is the buffer.  Does
> anyone have any suggestions of other things I could try?
>
> The Error I'm receiving is consistent:
> //
> // MessageId: ERROR_ALREADY_EXISTS
> //
> // MessageText:
> //
> //  Cannot create a file when that file already exists.
> //
> #define ERROR_ALREADY_EXISTS             183L
>
> I'm not sure what that means.  Googleing it didn't help much.
>
> Does anyone have some suggestions on how to send in a long buffer for the
> api to fill?
>
> Any help would be greatly appreciated!
>
> Thanks,
>
> Ron Teitelbaum
>
>
>