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Using AddressOf to call function in VC++ DLL from VB

Posted on 2006-06-21
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Last Modified: 2008-02-26
Been given a third party DLL written in Visual C++
This DLL have a method to enable a client to give the address of a callback method.
A DLL's background thread calls the client's callback when some events occur.

I am given the following details, not sure what to make of it since i do not know VC++ :-
int openDevice(int typ, CALLBACKBCOM cbf, void* param=NULL)
where the parameters
cbf specifies the user callback procedure with definition: typedef void (CALLBACKCOM)(int nStatus, int nTracks)

How can i write a VB program to get data making use of the operator AddressOf? I am not familiar with VB's CallBack although i have gone through some samples on this site.

Some sample code would be appreciated.

Thanks,
Joanne
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Question by:BSKhoo
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EDDYKT earned 250 total points
ID: 16951190
how about

Public Sub callback_function(ByVal nStatus As Long, ByVal nTracks As Long)
     ' Do your stuff
End Sub

dim Ret as long

Ret = openDevice(1, AddressOf (callback_function))
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