change LAN proxy - c++

Question

I want to enable proxy from BHO for only Internet Explorer or if that is not possible at least set proxy for LAN.
After the below code is executed nothing happen, proxy is not changed and not enabled.
I want to change proxy settings when a user visit a website, and Idealy will be if it is possible to enable proxy only for internet explorer, so other programs can work normaly with direct connection which not need proxy, so if it is possible to set proxy only for internet explorer please tell me how, I would like also to use PAC automation script if it is possible.
This code have no errors, but proxy is not enabled, and nothing happen:
INTERNET_PER_CONN_OPTION_LIST conn_options;
BOOL bReturn;
DWORD dwBufferSize = sizeof(conn_options);
conn_options.dwSize = dwBufferSize;
conn_options.pszConnection = NULL;//connNameStr;//NULL == LAN
conn_options.dwOptionCount = 3;
conn_options.pOptions = new INTERNET_PER_CONN_OPTION[3];
if(!conn_options.pOptions) ::MessageBox(NULL,_T("option error"),_T("option error"),MB_ICONSTOP);
conn_options.pOptions[0].dwOption = INTERNET_PER_CONN_FLAGS;
conn_options.pOptions[0].Value.dwValue = PROXY_TYPE_DIRECT|PROXY_TYPE_PROXY;
conn_options.pOptions[1].dwOption = INTERNET_PER_CONN_PROXY_SERVER;
conn_options.pOptions[1].Value.pszValue = TEXT("100.200.100.200:1020");
conn_options.pOptions[2].dwOption = INTERNET_PER_CONN_PROXY_BYPASS;
conn_options.pOptions[2].Value.pszValue = _T("local");
bReturn = InternetSetOption(NULL,INTERNET_OPTION_PER_CONNECTION_OPTION, &conn_options, dwBufferSize);
delete [] conn_options.pOptions;
bReturn = InternetSetOption(NULL, INTERNET_OPTION_SETTINGS_CHANGED, NULL, 0);
bReturn = InternetSetOption(NULL, INTERNET_OPTION_REFRESH , NULL, 0);
The above code is supposed to change the proxy, but if I use it in the below code in the document complete event, it compile successful but will not change the proxy.
#include <windows.h>
#include <tchar.h>
#include <exdisp.h>
#include <exdispid.h>
#include <mshtml.h>
#include <mshtmdid.h>
#include <shlwapi.h>
HINSTANCE hInstance;
LONG gref=0;
const CLSID BhoCLSID = {0xC9C42510,0x9B41,0x42c1,0x9D,0xCD,0x72,0x82,0xA2,0xD0,0x7C,0x61};
#define BhoCLSIDs _T("{C9C42510-9B41-42c1-9DCD-7282A2D07C61}")
class BHO : public IObjectWithSite, public IDispatch
{ long ref;
IWebBrowser2* webBrowser;
IHTMLDocument* doc; IHTMLDocument2 *doc2;
IHTMLWindow2 *win2;
public:
// IUnknown...
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppv) {if (riid==IID_IUnknown) *ppv=static_cast<BHO*>(this); else if (riid==IID_IObjectWithSite) *ppv=static_cast<IObjectWithSite*>(this); else if (riid==IID_IDispatch) *ppv=static_cast<IDispatch*>(this); else return E_NOINTERFACE; AddRef(); return S_OK;}
ULONG STDMETHODCALLTYPE AddRef() {InterlockedIncrement(&gref); return InterlockedIncrement(&ref);}
ULONG STDMETHODCALLTYPE Release() {int tmp=InterlockedDecrement(&ref); if (tmp==0) delete this; InterlockedDecrement(&gref); return tmp;}
// IDispatch...
HRESULT STDMETHODCALLTYPE GetTypeInfoCount(unsigned int FAR* pctinfo) {*pctinfo=1; return NOERROR;}
HRESULT STDMETHODCALLTYPE GetTypeInfo(unsigned int iTInfo, LCID lcid, ITypeInfo FAR* FAR* ppTInfo) {return NOERROR;}
HRESULT STDMETHODCALLTYPE GetIDsOfNames(REFIID riid, OLECHAR FAR* FAR* rgszNames, unsigned int cNames, LCID lcid, DISPID FAR* rgDispId) {return NOERROR;}
HRESULT STDMETHODCALLTYPE Invoke(DISPID dispIdMember, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS FAR* pDispParams, VARIANT FAR* pVarResult, EXCEPINFO FAR* pExcepInfo, unsigned int FAR* puArgErr)
{
// DISPID_DOCUMENTCOMPLETE: This is the earliest point we can obtain the "document" interface
if (dispIdMember==DISPID_DOCUMENTCOMPLETE)
{ if (!webBrowser) return E_FAIL;
IDispatch *idisp; webBrowser->get_Document(&idisp);
if (idisp && !doc) idisp->QueryInterface(IID_IHTMLDocument, (void**)&doc);
if (idisp && !doc2) idisp->QueryInterface(IID_IHTMLDocument2, (void**)&doc2);
if (doc2 && !win2) doc2->get_parentWindow(&win2);
IConnectionPointContainer *cpc=0; if (doc) doc->QueryInterface(IID_IConnectionPointContainer, (void**) &cpc);
IConnectionPoint* cp=0; if (cpc) cpc->FindConnectionPoint(DIID_HTMLDocumentEvents2, &cp);
DWORD cookie; HRESULT hr; if (cp) hr=cp->Advise(static_cast<IDispatch*>(this), &cookie);
if (cp) cp->Release(); if (cpc) cpc->Release(); if (idisp) idisp->Release();
if (!doc || !doc2 || !win2 || hr!=S_OK) {release(); return E_FAIL;}
return NOERROR;
}
if (dispIdMember==DISPID_HTMLDOCUMENTEVENTS_ONCLICK)
{ // This shows how to respond to simple events.
MessageBox(0,_T("Try pressing some keys on the keyboard!"),_T("BHO"),MB_OK);
return NOERROR;
}
if (dispIdMember==DISPID_HTMLDOCUMENTEVENTS_ONKEYDOWN)
{ // This shows how to examine the "event object" of an event
IDispatch *param1=0; if (pDispParams->cArgs==1 && (pDispParams->rgvarg)[0].vt==VT_DISPATCH) param1=(pDispParams->rgvarg)[0].pdispVal;
IHTMLEventObj *pEvtObj=0; if (param1) param1->QueryInterface(IID_IHTMLEventObj, (void**)&pEvtObj);
long keycode; HRESULT hr; if (pEvtObj) hr=pEvtObj->get_keyCode(&keycode);
if (pEvtObj) pEvtObj->Release();
if (!pEvtObj || hr!=S_OK) return E_FAIL;
// This shows how to manipulate the CSS style of an element
int i=keycode-32; if (i<0) i=0; if (i>63) i=63; i*=4;
wchar_t buf[100]; wsprintfW(buf,L"rgb(%i,%i,%i)",i,255-i,i/2);
IHTMLElement *body=0; doc2->get_body(&body);
IHTMLStyle *style=0; if (body) body->get_style(&style);
VARIANT v; v.vt=VT_BSTR; v.bstrVal=buf;
if (style) style->put_backgroundColor(v);
if (style) style->Release(); if (body) body->Release();
if (!body || !style) return E_FAIL;
return NOERROR;
}
return NOERROR;
}
// IObjectWithSite...
HRESULT STDMETHODCALLTYPE GetSite(REFIID riid, void** ppvSite) {return E_NOINTERFACE;}
HRESULT STDMETHODCALLTYPE SetSite(IUnknown* iunk)
{ // This is called by IE to plug us into the current web window
release();
iunk->QueryInterface(IID_IWebBrowser2, (void**)&webBrowser);
IConnectionPointContainer *cpc=0; iunk->QueryInterface(IID_IConnectionPointContainer, (void**)&cpc);
IConnectionPoint* cp=0; if (cpc) cpc->FindConnectionPoint(DIID_DWebBrowserEvents2, &cp);
DWORD cookie; HRESULT hr; if (cp) hr=cp->Advise(static_cast<IDispatch*>(this), &cookie);
if (!webBrowser || !cpc || !cp || hr!=S_OK) {if (cp) cp->Release(); if (cpc) cpc->Release(); release(); return E_FAIL;}
return S_OK;
}
// BHO...
BHO() : ref(0), webBrowser(0), doc(0), doc2(0), win2(0) {};
~BHO() {release();}
void release() {if (webBrowser) webBrowser->Release(); webBrowser=0; if (doc) doc->Release(); doc=0; if (doc2) doc2->Release(); doc2=0; if (win2) win2->Release(); win2=0;}
};
class MyClassFactory : public IClassFactory
{ long ref;
public:
// IUnknown... (nb. this class is instantiated statically, which is why Release() doesn't delete it.)
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppv) {if (riid==IID_IUnknown || riid==IID_IClassFactory) {*ppv=this; AddRef(); return S_OK;} else return E_NOINTERFACE;}
ULONG STDMETHODCALLTYPE AddRef() {InterlockedIncrement(&gref); return InterlockedIncrement(&ref);}
ULONG STDMETHODCALLTYPE Release() {int tmp = InterlockedDecrement(&ref); InterlockedDecrement(&gref); return tmp;}
// IClassFactory...
HRESULT STDMETHODCALLTYPE LockServer(BOOL b) {if (b) InterlockedIncrement(&gref); else InterlockedDecrement(&gref); return S_OK;}
HRESULT STDMETHODCALLTYPE CreateInstance(LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObj) {*ppvObj = NULL; if (pUnkOuter) return CLASS_E_NOAGGREGATION; BHO *bho=new BHO(); bho->AddRef(); HRESULT hr=bho->QueryInterface(riid, ppvObj); bho->Release(); return hr;}
// MyClassFactory...
MyClassFactory() : ref(0) {}
};
STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppvOut)
{ static MyClassFactory factory; *ppvOut = NULL;
if (rclsid==BhoCLSID) {return factory.QueryInterface(riid,ppvOut);}
else return CLASS_E_CLASSNOTAVAILABLE;
}
STDAPI DllCanUnloadNow(void)
{ return (gref>0)?S_FALSE:S_OK;
}
STDAPI DllRegisterServer(void)
{ TCHAR fn[MAX_PATH]; GetModuleFileName(hInstance,fn,MAX_PATH);
SHSetValue(HKEY_CLASSES_ROOT,_T("CLSID\\")BhoCLSIDs,_T(""),REG_SZ,_T("BHO"),4*sizeof(TCHAR));
SHSetValue(HKEY_CLASSES_ROOT,_T("CLSID\\")BhoCLSIDs _T("\\InProcServer32"),_T(""),REG_SZ,fn,((int)_tcslen(fn)+1)*sizeof(TCHAR));
SHSetValue(HKEY_CLASSES_ROOT,_T("CLSID\\")BhoCLSIDs _T("\\InProcServer32"),_T("ThreadingModel"),REG_SZ,_T("Apartment"),10*sizeof(TCHAR));
SHSetValue(HKEY_LOCAL_MACHINE,_T("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Browser Helper Objects\\")BhoCLSIDs,_T(""),REG_SZ,_T(""),sizeof(TCHAR));
return S_OK;
}
STDAPI DllUnregisterServer()
{ SHDeleteKey(HKEY_CLASSES_ROOT,_T("CLSID\\") BhoCLSIDs);
SHDeleteKey(HKEY_LOCAL_MACHINE,_T("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Browser Helper Objects\\")BhoCLSIDs);
return S_OK;
}
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{ if (fdwReason==DLL_PROCESS_ATTACH) hInstance=hinstDLL;
return TRUE;
}
Full source code is available for download here:
http://www.wischik.com/lu/programmer/bho.html