如何获得本机子网掩码？

Question

如何获得本机子网掩码？

Answer 1

GetIpAddrTable();原 型：
DWORD GetIpAddrTable
(
    PMIB_IPADDRTABLE pIpAddrTable,
   //buffer for mapping table
    PULONG pdwSize,//size of buffer
    BOOL bOrder       //sort the table 
);Requirements:Windows NT/2000/XP: Included in Windows NT 4.0 SP4; Windows 2000; Windows XP Pro; and Windows .NET Server.Windows 95/98/Me: Included in Windows 98 and later.Header: Declared in Iphlpapi.h.Library: Use Iphlpapi.lib.
返回值示例：pIpAddrTable->
    dwNumEntries = 2    table[0].dwAddr = 0x58ca09c0//192.9.202.88   
                  dwMask = 0xffffff//255.255.255.0  
                  dwBCastAddr = 0x1//1.0.0.0        
                  dwIndex = 0x2
                  dwReasmSize = 0xffff
                  wType = 0x23    table[1].dwAddr = 0x100007f//127.0.0.1      
                  dwMask = 0xff//255.0.0.0      
                  dwBCastAddr = 0x1//1.0.0.0        
                  dwIndex = 0x1
                  dwReasmSize = 0xffff
                  wType = 0x23

Answer 2

http://www.zdnet.com.cn/i/developer/story/200208/39046680/code_1.htm

Answer 3

http://www.zdnet.com.cn/i/developer/story/200208/39046680/code_1.htm

Answer 4

用WinpCap，见下面文章，它的例子列出了本机的子网掩码
http://www.sangel.net/article/list.asp?id=246