Coordinated transactions using MSDTC

It would be very nice to be able to take advantage of distributed transactions.
I saw a lot of intefaces written for AX and all of them were unnecessarily complicated to make sure no double processing takes place nor nothing is lost in the middle. All that complication can be avoided if we make use of Microsoft Distributed Transaction Coodinator. Easy said, but unfortunatelly Axapta does not provide such functionality 'out of box'. But not everything is lost, and with some luck it seems to be possible.
MSDN says: In the first step application must call DtcGetTransactionManager from xoleHlp.dll. Piece of cake.
Short script with DLL and DLLFunction and... Oops. "Called dll returned wrong value in BP register". A first obstacle is here: DtcGetTransactionManager is compiled with __cdecl directive, but AX calls it as it were __stdcall, thus stack is not cleaned, and BP mismatched.
To pass this problem I wrote a xolehlp.dll wrapper, which has functions declared in the way AX has no problem to call it.
Now I can call DtcGetTransactionManager and get the object with IID_TransactionDispenser interface. I can even start distributed transaction now.
[to be continued]