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Open a URL in a new window

, 10 Jul 2003
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An article showing how to launch a URL in a new browser window
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Introduction

Ever wanted to open a URL without blatting the contents of an existing browser window?  Here's how - and it will only take you seconds.

First, include the header file:

 #include "url.h"

Then simply declare a CURL object and call the Open method:

CURL url;
url.Open(_T("<A href="http://www.codeproject.com/">http://www.codeproject.com/</A>"));

If you want to re-use an existing browser window, then pass false as the second parameter:

CURL url;
url.Open(_T("<A href="http://www.codeproject.com/">http://www.codeproject.com/</A>"), false);

That's it!  Easy - and you can use this code with any CString friendly framework (MFC, WTL, ATL7).

CURL

#pragma once

class CURL
{
private:
 // The default browser
 CString m_strBrowser;
public:
 // Open a URL
 void Open(LPCTSTR lpszURL, bool bNewWindow = true)
 {
  if (bNewWindow)
   ::ShellExecute(NULL, NULL, GetBrowser(), lpszURL, NULL, SW_SHOWNORMAL);
  else
   ::ShellExecute(NULL, NULL, lpszURL, NULL, NULL, SW_SHOWNORMAL);
 }

 // Get the default browser from the registry
 LPCTSTR GetBrowser(void)
 {
  // Have we already got the browser?
  if (m_strBrowser.IsEmpty())
  {
   // Get the default browser from HKCR\http\shell\open\command
   HKEY hKey = NULL;
   // Open the registry
   if (::RegOpenKeyEx(HKEY_CLASSES_ROOT, _T("http\\shell\\open\\command"),
     0, KEY_READ, &hKey) == ERROR_SUCCESS)
   {
    // Data size
    DWORD cbData = 0;
    // Get the default value
    if (::RegQueryValueEx(hKey, NULL, NULL, NULL, NULL, &cbData) 
        == ERROR_SUCCESS && cbData > 0)
    {
     // Allocate a suitable buffer
     TCHAR* psz = new TCHAR [cbData];
     // Success?
     if (psz != NULL)
     {
      if (::RegQueryValueEx(hKey, NULL, NULL,
       NULL, (LPBYTE)psz, &cbData) ==
       ERROR_SUCCESS)
      {
       // Success!
       m_strBrowser = psz;
      }
      delete [] psz;
     }
    }
    ::RegCloseKey(hKey);
   }
   // Do we have the browser?
   if (m_strBrowser.GetLength() > 0)
   {
    // Strip the full path from the string
    int nStart = m_strBrowser.Find('"');
    int nEnd = m_strBrowser.ReverseFind('"');
    // Do we have either quote?
    // If so, then the path contains spaces
    if (nStart >= 0 && nEnd >= 0)
    {
     // Are they the same?
     if (nStart != nEnd)
     {   
      // Get the full path
      m_strBrowser = m_strBrowser.Mid(nStart + 1, nEnd - nStart - 1);
     }
    }
    else
    {
     // We may have a pathname with spaces but
     // no quotes (Netscape), e.g.:
     //   C:\PROGRAM FILES\NETSCAPE\COMMUNICATOR\PROGRAM\NETSCAPE.EXE -h "%1"
     // Look for the last backslash
     int nIndex = m_strBrowser.ReverseFind('\\');
     // Success?
     if (nIndex > 0)
     {
      // Look for the next space after the final
      // backslash
      int nSpace = m_strBrowser.Find(' ', nIndex);
      // Do we have a space?
      if (nSpace > 0)
       m_strBrowser = m_strBrowser.Left(nSpace);    
     }
    }
   }
  }
  // Done
  return m_strBrowser;
 }
};

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author


Comments and Discussions

 
QuestionRegsitry key to get default browser is wrong PinmemberRamveer Singh from Gurgaon, Haryana10-Nov-11 0:13 
QuestionIt's not work for Safari PinmemberDaniel Xu13-Jul-11 16:58 
GeneralIts not working in vs2008 for windows6.5 mobile device PinmemberAshutosh kumar Tripathi23-Mar-11 4:09 
GeneralMy vote of 2 PinmemberKarstenK15-Dec-08 2:53 
QuestionProblem with Running the Setup Pinmemberlaleh_sg1-Oct-06 21:51 
QuestioncURL in c# Pinmemberplz.ze28-Sep-06 2:53 
AnswerRe: cURL in c# PinmemberRob Caldecott28-Sep-06 4:24 
GeneralFirefox takes &quot;-new&quot; command line argument Pinmembersemmel7113-Nov-05 2:07 
GeneralOpen a URL with no Toolbar Pinmembervtnam063495-May-05 16:31 
GeneralRe: Open a URL with no Toolbar PinsussAnonymous8-May-05 19:04 
GeneralImproved browser path detection Pinmembermnjackson19-Jan-05 2:34 
GeneralRe: Improved browser path detection PinsussAnonymous19-Jan-05 8:22 
GeneralRe: Improved browser path detection Pinmembermnjackson19-Jan-05 10:05 
AnswerRe: Improved browser path detection Pinmemberdima polyakov17-May-07 19:20 
GeneralRe: Improved browser path detection Pinmemberoferhe14-Jan-06 23:55 
GeneralSimpler fix Re: Improved browser path detection Pinmemberpeas26-Aug-08 11:22 
GeneralMakes sense only for Internet Explorer, after test PinmemberAlexandru7-Dec-04 0:22 
QuestionWhat will be the sub key for the AVI file PinsussAnonymous3-Oct-04 19:04 
GeneralModifications for FireFox PinmemberJeremy Davis29-Jul-04 1:21 
GeneralRe: Modifications for FireFox PinmemberRobert Edward Caldecott29-Jul-04 1:44 
GeneralRe: Modifications for FireFox, Mozilla, Netscape, Opera, IE Pinmembertoshiya3-Nov-04 15:41 
GeneralRe: Modifications for FireFox, Mozilla, Netscape, Opera, IE PinsussAnonymous3-May-05 8:28 
Questionbuilder 6 version? Pinmembervertygo30-Sep-03 0:11 
AnswerRe: builder 6 version? PinmemberRobert Edward Caldecott30-Sep-03 0:14 
GeneralMuch simpler for browser path... PinsussJai b28-Sep-03 23:39 

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