WSADATA是干嘛用的？

[gaoxiaofei]

请问一下 下面的代码中
icmpCreateFile
icmpCloseHandle
icmpSendEcho
都是做什么用的？
WSADATA有时做什么用的？
谢谢！

hinsticmp=LoadLibrary("icmp.dll");
if(hinsticmp==NULL)
MessageBox(NULL,"NG","ERR",MB_OK);
else
{
icmpCreateFile=(ICMPCREATEFILE)GetProcAddress(hinsticmp,"IcmpCreateFile");
icmpCloseHandle=(ICMPCLOSEHANDLE)GetProcAddress(hinsticmp,"IcmpCloseHandle");
icmpSendEcho=(ICMPSENDECHO)GetProcAddress(hinsticmp,"IcmpSendEcho");
//MessageBox(NULL,"OK","ERR",MB_OK);
}

WSADATA wsaData;
WSAStartup(0x0101,&wsaData);

[platinum15]

好像是给动态链接库里面的导出函数取个别名的意思

[platinum15]

WSADATA 可能是自己定义的数据结构

[platinum15]

数据类型

[taianmonkey]

This structure is used to store Windows Sockets initialization information returned by a call to the AfxSocketInit global function.

[taianmonkey]

In MFC, the WSADATA structure is returned by the AfxSocketInit function, which you call in your InitInstance function. You can retrieve the structure and store it in your program if you need to use information from it later.

[taianmonkey]

IcmpCreateFile
This function creates a handle on which Internet Control Message Protocol (ICMP) requests can be issued.

IcmpCloseHandle
This function closes an Internet Control Message Protocol (ICMP) handle opened by IcmpCreateFile.

IcmpSendEcho
This function sends an Internet Control Message Protocol (ICMP) echo request, and returns one or more replies