Size_T Value

What is the value of Size_T use in the declaration fo GetWriteWatch Function?
Public Declare Function GetWriteWatch Lib "kernel32.dll" _
(ByVal dwFlags As Long, lpBaseAddress As Any, ByRef dwRegionSize As SIZE_T, _
lpAddresses As Any, ByRef lpdwCount As Long, _
ByRef lpdwGranularity As Long) As Long

Thank You in Advance,
Julian

In C++, Size_T is the result of the sizeof() operator, hence declare it as Long in VB.