Set the Default Search Engine Provider of IE with IOpenServiceManager::InstallService - c++

Question

I would like to set the Default Search Engine Provider of IE with IOpenServiceManager::InstallService:
Belong to the link http://www.opensearch.org/Specifications/OpenSearch/1.1#OpenSearch_description_elements. I created the SearchProviderInfo.xml like this:
<?xml version="1.0" encoding="UTF-8"?> <OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/"> <ShortName>Web Search</ShortName> <Description>Use Example.com to search the Web.</Description> <Tags>example web</Tags> <Contact>admin#example.com</Contact> <Url type="application/atom+xml" template="http://example.com/?q={searchTerms}&pw={startPage?}&format=atom"/> <Url type="application/rss+xml" template="http://example.com/?q={searchTerms}&pw={startPage?}&format=rss"/> <Url type="text/html" template="http://example.com/?q={searchTerms}&pw={startPage?}"/> <LongName>Example.com Web Search</LongName> <Image height="64" width="64" type="image/png">http://example.com/websearch.png</Image> <Image height="16" width="16" type="image/vnd.microsoft.icon">http://example.com/websearch.ico</Image> <Query role="example" searchTerms="cat" /> <Developer>Example.com Development Team</Developer> <Attribution> Search data Copyright 2005, Example.com, Inc., All Rights Reserved </Attribution> <SyndicationRight>open</SyndicationRight> <AdultContent>false</AdultContent> <Language>en-us</Language> <OutputEncoding>UTF-8</OutputEncoding> <InputEncoding>UTF-8</InputEncoding> </OpenSearchDescription>
Belong to the link http://msdn.microsoft.com/en-us/library/cc849088%28v=vs.85%29.aspx. I create the project "SetDefaultHelper" like this:
#include <windows.h>
#include <atlbase.h>
#include <wininet.h>
#include <urlmon.h>
#include <string>
#include "openservice.h"
#pragma comment(lib, "urlmon.lib")
void DisplayUsage()
{
wprintf(L"\r\nSetDefaultHelper.exe -- Call SetDefault API on a search provider");
wprintf(L"\r\n");
wprintf(L"\r\nUSAGE: SetDefaultHelper.exe <option>");
wprintf(L"\r\n");
wprintf(L"\r\nOptions (these are mutually exclusive!):");
wprintf(L"\r\n");
wprintf(L"\r\n /guid <guid> GUID of an installed search provider");
wprintf(L"\r\n /url <url> URL of an OpenSearch Description file");
wprintf(L"\r\n");
}
int __cdecl wmain(__in int argc, __in_ecount(argc) WCHAR* argv[])
{
HRESULT hr = E_FAIL;
BOOL fComInitialized = FALSE;
if (3 != argc)
{
DisplayUsage();
}
else if (SUCCEEDED(CoInitialize(NULL)))
{
fComInitialized = TRUE;
CComPtr<IOpenServiceManager> spManager;
hr = spManager.CoCreateInstance(CLSID_OpenServiceManager);
if (SUCCEEDED(hr))
{
CComPtr<IOpenService> spService;
if (0 == _wcsicmp(argv[1], L"/guid"))
{
// Get an IOpenService pointer from the GUID.
WCHAR szEscaped[INTERNET_MAX_URL_LENGTH] = L"";
DWORD cchEscaped = ARRAYSIZE(szEscaped);
hr = UrlEscape(argv[2], szEscaped, &cchEscaped, URL_ESCAPE_SEGMENT_ONLY);
if (SUCCEEDED(hr))
{
std::wstring wsOsid(L"x-osid:1:search:");
wsOsid += szEscaped;
hr = spManager->GetServiceByID(wsOsid.c_str(), &spService);
}
}
else if (0 == _wcsicmp(argv[1], L"/url"))
{
// Install the provider to get an IOpenService pointer.
//CComPtr<IUri> spUri;
//hr = CreateUri(argv[2], 0, 0, &spUri);
//if (SUCCEEDED(hr))
//{
hr = spManager->InstallService(argv[2], &spService);
//}
}
else
{
DisplayUsage();
hr = E_FAIL;
}
if (SUCCEEDED(hr))
{
hr = spService->SetDefault(TRUE, NULL);
}
}
}
if (fComInitialized)
{
CoUninitialize();
}
return hr;
}
I build the project ok. Both file SetDefaultHelper.exe and SearchProviderInfo.xml are same folder. In the project setting, set Configuration Properties > Debugging > Commands Arguments = /url absolutePaht/searchProvider.xml. Then run debug (F10), at line "hr = CreateUri(argv[2], 0, 0, &spUri);", the rusult hr is so stranger. I don't know why. Can you help me?
Thank you very much.
[Resolved]:
1. Don't need CreateUri //commented
2. Use a absolutely path.

Answer 1

Use absolute path and UrlCreateFromPath to create a file:/// like URL, pass that URL to InstallService.
Between, it seems that your XML has error.
WCHAR szURL[MAX_PATH] = L"";
DWORD cchURL = ARRAYSIZE(szURL);
hr = ::UrlCreateFromPath(argv[2], szURL, &cchURL, 0);
if (SUCCEEDED(hr))
{
hr = spManager->InstallService(argv[2], &spService);
// Now we can set it as the default.
if (SUCCEEDED(hr))
{
hr = spService->SetDefault(TRUE, NULL);
if (hr == OS_E_CANCELLED)
{
hr = E_ACCESSDENIED; // by the user!
}
}
}