https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-globalmemorystatus

C# Definition:

[StructLayout(LayoutKind.Sequential)]
class MEMORYSTATUS {
     public uint dwLength;
     public uint dwMemoryLoad;
     public IntPtr dwAvailPhys;
     public IntPtr dwTotalPageFile;
     public IntPtr dwAvailPageFile;
     public IntPtr dwTotalVirtual;
     public IntPtr dwAvailVirtual;
}

VB Definition:

Structure MEMORYSTATUS_structure
   Public TODO
End Structure

User-Defined Field Types:

None.

Notes:

None.

https://docs.microsoft.com/de-de/windows/desktop/api/winbase/ns-winbase-_memorystatus