C# Signature:
[DllImport("kernel32.dll")]
static extern void GetSystemInfo(out SYSTEM_INFO lpSystemInfo);
User-Defined Types:
None.
Notes:
This API mapping demonstrates mapping a union in C#.
Tips & Tricks:
Please add some!
Sample Code:
using System;
using System.Runtime.InteropServices;
namespace TestGetSystemInfo
{
public class WinApi
{
[DllImport("kernel32.dll")]
public static extern void GetSystemInfo([MarshalAs(UnmanagedType.Struct)] ref SYSTEM_INFO lpSystemInfo);
[StructLayout(LayoutKind.Sequential)]
public struct SYSTEM_INFO
{
internal _PROCESSOR_INFO_UNION uProcessorInfo;
public uint dwPageSize;
public uint lpMinimumApplicationAddress;
public uint lpMaximumApplicationAddress;
public uint dwActiveProcessorMask;
public uint dwNumberOfProcessors;
public uint dwProcessorType;
public uint dwAllocationGranularity;
public uint dwProcessorLevel;
public uint dwProcessorRevision;
}
[StructLayout(LayoutKind.Explicit)]
public struct _PROCESSOR_INFO_UNION
{
[FieldOffset(0)]
internal uint dwOemId;
[FieldOffset(0)]
internal ushort wProcessorArchitecture;
[FieldOffset(2)]
internal ushort wReserved;
}
}
public class Program
{
public static void Main(string[] args)
{
WinApi.SYSTEM_INFO sysinfo = new WinApi.SYSTEM_INFO();
WinApi.GetSystemInfo(ref sysinfo);
Console.WriteLine("dwProcessorType ={0}", sysinfo.dwProcessorType.ToString());
Console.WriteLine("dwPageSize ={0}", sysinfo.dwPageSize.ToString());
}
}
}
Alternative Managed API:
Do you know one? Please contribute it!
