Somehow get an array of UDTs into an activex dll ?

Ok.

I have an activexdll.
I also have a main application.


I want to pass an array of udts from the main app into the activex dll.
The activexdll has the udt declared inside it too.


I know i could save the info to a file, and pass the filename and let the activexdll load it from there.
I don't want to do that.

I don't seem to be allowed to pass the data as I could just inside my own main .exe



Another idea I've been toying with is passing a pointer and data length to the activexdll, and then perhaps it could use CopyMemory to copy a chunk of memory and somehow populate its udts with the info.


I'm pulling my hair out at this stage :(

Use a buffer :D

Here is a buffer class, you need this class in your client EXE and your DLL...

Woka

PS. Just going for a tab, and will be abck in 2 mins and post code on how to use it :D

PPS. If you have a UDT in a module say:

VB Code:

Public Type WoofProps
   PK_ID   As Long
   Bark     As String * 20
End Type

Then you will also need a UDT for the buffer which is the length of the buffer...this can be found by:

VB Code:

Dim udtBlah As WoofProps
   MsgBox LenB(udtBlah)/2

So your buffer UDT would be:

VB Code:

Public Type WoofData
   Buffer * 22 'the 22 is worked out by LenB(udtBlah)/2 (I worked 22 out in my head, it MAY be wrong, check it)
End Type

each data type has a different length, so it's advisable to ALWAYS work this length out by using the above formula and not just adding them up in your head :D

Back in a sec

Holy mother of god I'm completely lost :D

I'll write a small single form app that will demonstrate how it works :D

Hang on...

Woka

Cheers :)

*prod* ;)

Here it is :D

Just load the UDTDemo group...

Bugger :(
Just realise you wanted to pass the data TO a class, not retrieve it :(
Shouldn't be hard to reverse it, instead of assigniong objBuffer.GetStae to a function, just pass it to a sub in the DLL instead...

Woka

OK, this one passes the users TO the DLL instead :D

Woka

PS Is this what you wanted?

Hmmmm you're early binding to your dll ?

Just looking at second sample now...

Early binding???

You mean referencing the project instead of the compiled DLL...
Compile the DLL, and reference that from the EXE if you so wish :D

Woka

Don't suppose you could help me with my problem...:D

http://www.vbforums.com/showthread.phpthreadid=231545

:(

Woka

I'll have a look.
Can I send you an email ?

To show you my UDT. I don't know if it would be possible you see...