WIN7下使用API gethostbyname 返回值为0,该如何解决

WIN7下使用API gethostbyname 返回值为0
先直接上代码

VB code

  Private Function getip(name As String) As String        Dim hostent_addr     As Long        Dim host     As HOSTENT        Dim hostip_addr     As Long        Dim temp_ip_address()     As Byte        Dim i     As Integer        Dim ip_address     As String                  hostent_addr = gethostbyname(name)        If hostent_addr = 0 Then              getip = ""                                               '主机名不能被解释              Exit Function        End If                  RtlMoveMemory host, hostent_addr, LenB(host)        RtlMoveMemory hostip_addr, host.hAddrList, 4                  ReDim temp_ip_address(1 To host.hLength)        RtlMoveMemory temp_ip_address(1), hostip_addr, host.hLength                  For i = 1 To host.hLength              ip_address = ip_address & temp_ip_address(i) & "."        Next        ip_address = Mid$(ip_address, 1, Len(ip_address) - 1)        getip = ip_address      End Function

在Win7系统下，hostent_addr返回值为空，程序无法向下一步进行。但是在XP系统下却可以正常运行！
请教下哪里应该适当修改，可以兼容XP和WIN7呢？？

[解决办法]
域名和http://根本是两个概念，一个是DNS，一个是HTTP，建议使用时，无论是XP还是WIN7，均不要带http://。

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