Getting IP Address of Machine in VC++

Getting IP Address of machine in VC++

Introduction:

Here we can see how to get the multiple ip address available in machine and display it in Multi line text box in MFC.

How To start:

here am used MFC dialog based application you can change it accordingly.

note: make sure to select Socket support in Application Wizard

How to make Multi line text Box in MFC:

To make a Editbox as multi line text box follow this procedure .

• Select the edit box and select the properties
• Select Multiline checked
• Select want return checked

Selection will look like as follows

• Create member variable as Value type using Class Wizard. to insert a new line in edit box we should use “\r\n“.
• for example if the member variable is m_Text we can use as follows

m_Text="\r\n Hi \r\n This \r\n Multiline \r\n Sample";

Code To Get the IP Address:

The following code gets and displays the IP Address of the machine in the edit box.

void CDispalyIPAddressDlg::OnGetIP()
{
 UpdateData(TRUE);
 char HostName[128];
 //Get host name and Check is there was any error
 if (gethostname(HostName, sizeof(HostName)) == SOCKET_ERROR)
 {
 AfxMessageBox("Error in Getting Host Info");
 CDialog::OnCancel();
 }
 //Get the ip address of the machine using gethostbyname function
 struct hostent *IpList = gethostbyname(HostName);
 m_List+="Host Name is:";
 m_List+=HostName;
 m_List+="\r\n";
 if (IpList == 0)
 {
 AfxMessageBox("Yow! Bad host lookup.");
 CDialog::OnCancel();
 }
 m_List+="\r\n\r\nIP Address Available are:\r\n";
 m_List+="----------------------------------------------------------\r\n";
 //Enumerate list of Ip Address available in the machine
 for (int i = 0; IpList->h_addr_list[i] != 0; ++i)
 {
 struct in_addr addr;
 memcpy(&addr, IpList->h_addr_list[i], sizeof(struct in_addr));
 CString str=inet_ntoa(addr);
 m_List=m_List+ str;
 m_List+="\r\n" ;
 }
 m_List+="-----------------------------------------------------------\r\n";
 UpdateData(FALSE);
}

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Final Output

Final looks like in the following screen shot.