C# Definition:

private struct MEMORYSTATUSEX

{

    public int Length;
    public int MemoryLoad;
    public UInt32 TotalPhysical;
    public UInt32 AvailablePhysical;
    public UInt32 TotalPageFile;
    public UInt32 AvailablePageFile;
    public UInt32 TotalVirtual;
    public UInt32 AvailableVirtual;
    public UInt32 AvailableExtendedVirtual;

}

VB Definition:

Structure MEMORYSTATUSEX
   Public TODO
End Structure

User-Defined Field Types:

None.

Notes:

Length must be filled in before calling the GlobalMemoryStatusEx method, using Marshal.Sizeof() method