//Get_IP.c
#include<winsock.h>
#include"resource.h"
int WSA_return;
WSADATA WSAData;
HOSTENT *host_entry;
char host_name[256];
char host_address[256];
BOOL APIENTRY Hostname_ipDlgPro(HWND hDlg,UINT message,WPARAM wParam,LPARAM IParam);
int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
    WSA_return = WSAStartup(0x0101,&WSAData);
    if(WSA_return == 0)
    {
        gethostname(host_name,256);
        host_entry = gethostbyname(host_name);
        if(host_entry !=0)
        {
            wsprintf(host_address,"%d.%d.%d.%d",
                (host_entry->h_addr_list[0][0]&0x00ff),
                (host_entry->h_addr_list[0][1]&0x00ff),
                (host_entry->h_addr_list[0][2]&0x00ff),
                (host_entry->h_addr_list[0][3]&0x00ff));
        }
    }
    WSACleanup();
    DialogBox(hInstance,"DIALOG1",NULL,(DLGPROC)Hostname_ipDlgPro);
    return 0;
}
BOOL APIENTRY Hostname_ipDlgPro(HWND hDlg,UINT message,WPARAM wParam,LPARAM IParam)
{
    switch(message)
    {
    case WM_INITDIALOG:
        return(TRUE);
    case WM_COMMAND:
        if(LOWORD(wParam)==IDOK)
        {
                SetDlgItemText(hDlg,IDC_EDIT1,host_name);
                SetDlgItemText(hDlg,IDC_EDIT2,host_address);
                SetDlgItemText(hDlg,IDCANCEL,"确定");
        }
        if(LOWORD(wParam)== IDCANCEL)
            EndDialog(hDlg,TRUE);
            return (TRUE);
            break;
    }
    return(FALSE);
}

--------------------Configuration: ceshi - Win32 Debug--------------------
Linking...
ceshi.obj : error LNK2001: unresolved external symbol __imp__DialogBoxParamA@20
ceshi.obj : error LNK2001: unresolved external symbol __imp__wsprintfA
ceshi.obj : error LNK2001: unresolved external symbol __imp__EndDialog@8
ceshi.obj : error LNK2001: unresolved external symbol __imp__SetDlgItemTextA@12
Debug/ceshi.exe : fatal error LNK1120: 4 unresolved externals

编译器vc++6.0  加了wsock32.lib
不知道为什么无法编译，是那里错了吗