The three applications of network application

First, to determine whether you have been linked to the Internet

Read the local IP address using the Netmasters powersock control, if the "0.0.0.0" description is not connected.

Example:

void __fastcall TForm1::Button1Click(TObject *Sender)
{
if (Powersock1->LocalIP == "0.0.0.0")
ShowMessage("not connected");
else
ShowMessage(Powersock1->LocalIP);

Second, the issue of dialing

1, dial-up

You need to use the following telephony API.

function function

Lineinitializeex () Initialization of TAPI

Lineopen () get an available phone line handle (handle)

Linemakecall () Start dialing

To complete sending data outside of TAPI

Linedrop (),

Linedeallocatecall (),

Lineclose ().

Lineshutdown () End dialing

Third, call the browser

1.头文件：#include <shellapi.h>
2.void __fastcall TForm1::Button1Click(TObject *Sender)
{
ShellExecute(Application->Handle,"open",
"http://www.inprise.com",NULL,NULL,SW_SHOW);
}