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//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
typedef BOOL (WINAPI *PF_INETGETCONNECTEDSTATE)(LPDWORD, DWORD);
HANDLE hWinInet;
PF_INETGETCONNECTEDSTATE pfInternetGetConnectedState;
//.............
hWinInet = LoadLibrary("WININET.DLL"); //Chargement de la dll
if(hWinInet == NULL)
{
Label1->Caption = "Impossible de charger Wininet.dll";
return;
}
pfInternetGetConnectedState = (PF_INETGETCONNECTEDSTATE) GetProcAddress(
hWinInet, "InternetGetConnectedState");
// affectation du pointeur sur la fonction
if(pfInternetGetConnectedState == NULL)
{
Label1->Caption = "Erreur appel fonction InternetGetConnectedState";
if(hWinInet) FreeLibrary(hWinInet);
return;
}
//.............
DWORD TypeCon ;
if (pfInternetGetConnectedState(&TypeCon, 0)) //appel de la fonction
{
Label1->Caption = "Connecté";
if (TypeCon & INTERNET_CONNECTION_LAN)
Label1->Caption = "LAN - Connecté";
if (TypeCon & INTERNET_CONNECTION_MODEM)
Label1->Caption = "MODEM actif - Connecté";
if (TypeCon & INTERNET_CONNECTION_PROXY)
Label1->Caption = "PROXY-SERVER - Connecté";
}
else Label1->Caption = "Déconnecté";
// .............
// Suite du programme a executer
// .............
if(hWinInet) FreeLibrary(hWinInet); //libération de la dll
}
//--------------------------------------------------------------------------- |
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