On Aug 15, 2006, at 12:33 PM, Daniel Stenning wrote:
But I specifically need to pass the pointer of my structure to an
external
DLL function which takes a pointer to a structure. Is there no way
to do
this?
Byref passes the structure as a pointer to the structure.
Also - how can I convert a pointer to a structure obtained from a
Dylib call
into an RB structure reference ?
Depends on how it's given back to you. If it's returned to you from a
function call, you'll need to go through a MemoryBlock like:
dim mb as MemoryBlock
dim aStruct as MyStructure
mb = MyCall()
aStruct.StringValue( TargetLittleEndian ) = mb.StringValue( 0,
aStruct.Size )
Couldn't the AddressOf keyword be extended in future to cover this ?
There's no technical reason why it couldn't, but there is a reason
it's not already: Being able to get the address of items living on the
stack is risky business, because it's then possible to mess with the
internals of REALbasic far to easily, and could encourage some people
to rely on implementation details of how certain things work. Beyond
that, there is nothing you could do with this hypothetical feature
that you can't already do with a temporary MemoryBlock.
HTH,
Jon
--
Jonathan Johnson
[EMAIL PROTECTED]
REAL Software, Inc.
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