Passing function pointer from VB .NET to C dll

[kevin]

This is a repost with an update

Does any one know how to pass a function pointer as a function parameter
from VB .NET to a C dll?



Currently I'm passing it this way

Public Delegate Sub DSCUserInterruptFunction()

Public Declare Function dscUserInt Lib "dscud.dll" (ByVal board As Short,
ByRef dscuserint As dscUserInt, <MarshalAs(UnmanagedType.FunctionPtr)> ByRef
functions As DSCUserInterruptFunction) As Byte

Public Sub count()

dscUserInt(board, dscuserint, AddressOf count)

But this isn't working. My program just crashes and exits. Any ideas?
Thanks.

 

[Bishoy Ghaly]

Try the AddressOf()
it might work

 

[kevin]

Another related question

How do I keep the garbage collector from collecting the AddressOf count or
my funct variable below?

dim func as DSCUserIntFunction

func = AddressOf count

Thanks

 

[kevin]

Thanks, I'm one step closer!

--
Kevin Liu

Try the AddressOf()
it might work