VB lambda expression for sub delegate

[Egor Moroz]

There is the code:

Private Sub InsertItemInCache(Of T)(ByVal item As CachedItem(Of T), ByVal dependency As AggregateCacheDependency, _
ByVal key As String, ByVal updateCallBack As CacheItemUpdateCallback)

The signature of CacheItemUpdate Callback is:

Sub CacheItemUpdateCallback(ByVal key As String, ByVal reason As CacheItemUpdateReason, _
ByRef expensiveObject As Object, ByRef dependency As CacheDependency, ByRef absoluteExpiration As Date, _
ByRef slidingExpiration As TimeSpan)

I want to call InsertItemInCac he function using lamba expression for this.
This code is not compiled:

InsertItemInCache(cachedItem, dependency, key, Function(k, r, e, d, a, s) CacheItemUpdateCallback(k, r, e, d, a, s))

it says Expression does not produce a value

If I change Sub CacheItemUpdate Callback to Function CacheItemUpdate Callback
it also is not compiled

Can anyone help me to call this method via lambda expression? I want to use closure in the future and call this function in such way:

InsertItemInCache(cachedItem, dependency, key, Function(k, r, e, d, a, s) CacheItemUpdateCallbackNew(k, r, e, d, a, s, additionalParameter1, additionalParameter2, additionalParameter3))