i haven't esx server installed so i could not test the code,
but this is how i would have done it.
create a console application project an paste this code:
using System;
using System.Text;
using System.Runtime.InteropServices;
namespace ConsoleApplication2
{
class GuestTest
{
static void
Main(string[] args)
{
try
{
using(VMGuestLib lib = new VMGuestLib())
{
Console.WriteLine(string.Format("mem usage: \{0} of \{1} MB", lib.getMemActiveMB(), lib.getMemLimitMB()));
}
}
catch(Exception e)
{
Console.WriteLine(string.Format("guest test failed: \{0}\n\{1}", e.Message, e.StackTrace));
}
}
}
class VMGuestLib
: IDisposable
{
private readonly IntPtr m_Handle;
public VMGuestLib()
{
EnsureSuccess(VMGuestLib_OpenHandle(out this.m_Handle));
this.updateInfo();
}
~VMGuestLib()
{
this.Dispose(false);
}
public void
updateInfo()
{
EnsureSuccess(VMGuestLib_UpdateInfo(this.m_Handle));
}
public UInt32
getMemLimitMB()
{
UInt32 memLimitMB;
EnsureSuccess(VMGuestLib_GetMemLimitMB(this.m_Handle, out memLimitMB));
return memLimitMB;
}
public UInt32
getMemActiveMB()
{
UInt32 memActiveMB;
EnsureSuccess(VMGuestLib_GetMemActiveMB(this.m_Handle, out memActiveMB));
return memActiveMB;
}
#region IDisposable Member
public void
Dispose()
{
this.Dispose(true);
GC.SuppressFinalize(this);
}
private void
Dispose(bool disposing)
{
VMGuestLib_CloseHandle(this.m_Handle);
}
#endregion
#region Error Checking Helper
public static void
EnsureSuccess(VMGuestLibError error)
{
if (error != VMGuestLibError.VMGUESTLIB_ERROR_SUCCESS)
throw new VMGuestLibException(error);
}
#endregion
#region Guest API Imports
\[DllImport("vmGuestLib.dll")]
private static extern VMGuestLibError
VMGuestLib_OpenHandle(out IntPtr handle);
\[DllImport("vmGuestLib.dll")]
private static extern VMGuestLibError
VMGuestLib_CloseHandle(IntPtr handle);
\[DllImport("vmGuestLib.dll")]
private static extern VMGuestLibError
VMGuestLib_UpdateInfo(IntPtr handle);
\[DllImport("vmGuestLib.dll")]
private static extern VMGuestLibError
VMGuestLib_GetMemActiveMB(
IntPtr handle,
out UInt32 memActiveMB);
\[DllImport("vmGuestLib.dll")]
private static extern VMGuestLibError
VMGuestLib_GetMemLimitMB(
IntPtr handle,
out UInt32 memLimitMB);
#endregion
}
public enum VMGuestLibError
{
VMGUESTLIB_ERROR_SUCCESS = 0, // No error
VMGUESTLIB_ERROR_OTHER, // Other error
VMGUESTLIB_ERROR_NOT_RUNNING_IN_VM, // Not running in a VM
VMGUESTLIB_ERROR_NOT_ENABLED, // GuestLib not enabled on the host.
VMGUESTLIB_ERROR_NOT_AVAILABLE, // This stat not available on this host.
VMGUESTLIB_ERROR_NO_INFO, // UpdateInfo() has never been called.
VMGUESTLIB_ERROR_MEMORY, // Not enough memory
VMGUESTLIB_ERROR_BUFFER_TOO_SMALL, // Buffer too small
VMGUESTLIB_ERROR_INVALID_HANDLE, // Handle is invalid
VMGUESTLIB_ERROR_INVALID_ARG, // One or more arguments were invalid
}
public class VMGuestLibException
: Exception
{
public VMGuestLibException(VMGuestLibError error)
: base(VMGuestLib_GetErrorText(error).ToString())
\{}
#region Guest API Imports
\[DllImport("vmGuestLib.dll")]
\[return:MarshalAs(UnmanagedType.LPStr)]
private static extern string
VMGuestLib_GetErrorText(VMGuestLibError error);
#endregion
}
}
