远程服务器文件下载的两种方式

方式1：

#include
#include
#pragma   comment(linker, "/SUBSYSTEM:WINDOWS   /ENTRY:Entry ")
#pragma   comment(lib, "wininet.lib ")
#pragma   comment(lib, "kernel32.lib ")


void   FileDownload()
{
HINTERNET   hSession=InternetOpen(NULL,INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,0);
HINTERNET   hConnection=InternetOpenUrl(hSession, "http://www.google.com ",NULL,0,0,0);

BYTE   Buffer[4096];
DWORD   Read=0,i;
HANDLE   hFile=CreateFile( "c:\\index.htm ",GENERIC_WRITE,0,NULL,CREATE_ALWAYS,0,NULL);
InternetReadFile(hConnection,Buffer,sizeof(Buffer),&Read);
while(Read!=0)
{
WriteFile(hFile,Buffer,Read,&i,NULL);
InternetReadFile(hConnection,Buffer,sizeof(Buffer),&Read);
}
CloseHandle(hFile);

InternetCloseHandle(hConnection);
InternetCloseHandle(hSession);
}

方式2:

void   FileDownload()
{

typedef int (__stdcall *LPFNDLLFUNC)(PVOID,char*,char*,int,char*); /* 函数原型*/
  HINSTANCE   hDLL;              
  LPFNDLLFUNC   lpfnDllFunc;        
  char szUrlAddress[1024];
  
  GetDlgItem(IDC_EDIT1)->GetWindowText(szUrlAddress,1024);

  hDLL   =  LoadLibrary("urlmon.dll");
  if   (hDLL   !=   NULL)
  {
   lpfnDllFunc   =   (LPFNDLLFUNC)GetProcAddress(hDLL,   "URLDownloadToFileA");
   if   (!lpfnDllFunc)
   {
    FreeLibrary(hDLL);
    return ;
   }
   else
   {
    (lpfnDllFunc)(NULL,szUrlAddress,"C:\123.exe",0,NULL);
    FreeLibrary(hDLL); 
   }
     
  }
  ::MessageBox(NULL, "下载完成！", "提示", MB_OK);
  return;

 }