Thanks that worked great.  But now I want to take this one step further and
use the following Structure.

typedef struct _DFS_INFO_3 {  
LPWSTR EntryPath;  
LPWSTR Comment;  
DWORD State;  
DWORD NumberOfStorages;  
LPDFS_STORAGE_INFO Storage;
} DFS_INFO_3, *PDFS_INFO_3, *LPDFS_INFO_3;

You'll notice it has a pointer to the following Structure.

typedef struct _DFS_STORAGE_INFO {  
ULONG State;  
LPWSTR ServerName;  
LPWSTR ShareName;
} DFS_STORAGE_INFO, *PDFS_STORAGE_INFO, *LPDFS_STORAGE_INFO;

Below is how I convetered them to VB.NET

<StructLayout(LayoutKind.Sequential)> _
       Structure DFS_STORAGE_INFO
           Public Shared ReadOnly SIZEOF_str1 As Integer
           Shared Sub New()
               SIZEOF_str1 = Marshal.SizeOf(GetType(DFS_STORAGE_INFO))
           End Sub
           Public State As Integer
           <MarshalAs(UnmanagedType.LPWStr)> Public ServerName As String
           <MarshalAs(UnmanagedType.LPWStr)> Public ShareName As String
       End Structure

       <StructLayout(LayoutKind.Sequential)> _
       Structure DFS_INFO_3
           Public Shared ReadOnly SIZEOF_CI1 As Integer
           Shared Sub New()
               SIZEOF_CI1 = Marshal.SizeOf(GetType(DFS_INFO_3))
           End Sub

           <MarshalAs(UnmanagedType.LPWStr)> Public EntryPath As String
           <MarshalAs(UnmanagedType.LPWStr)> Public Comment As String
           Public State As Integer
           Public NumOfStorages As Integer
           <MarshalAs(UnmanagedType.LPStruct)> Public StorageStruct As
DFS_STORAGE_INFO
       End Structure

When I run the Application it throws an exception saying it can't correctly
deterimine the size of the Structure.  How to I calculate the size of a
Structure that references another Structure?  Thanks in Advance.

"Mattias Sjögren" wrote: