how to show a search bar in my class derived from CHtmlView

joshua0137

i write a class derived from CHtmlView, and write the code as below, when it run, no bar appear, and a messageBox show a string '0x80040100', what is the reason? how can i make it work. any suggestion or help are appreciated

void CXxView::OnShowBar()
{
IWebBrowser2 *pBrowser = NULL;
// Ensure that our site is an browser window
HRESULT hr = m_pBrowserApp->QueryInterface(IID_IWebBrowser2, (void **) &pBrowser);
if (SUCCEEDED(hr))
{
// Display the band object (the Search bar in this case)
VARIANT vtBandGUID, vtShow;
vtBandGUID.vt = VT_BSTR;
//change the CLSID as your bar CLSID
vtBandGUID.bstrVal = SysAllocString(OLESTR("{30D02401-6A81-11d0-8274-00C04FD5AE38}"));
vtShow.vt = VT_BOOL;
vtShow.boolVal = TRUE;
HRESULT hrx = pBrowser->ShowBrowserBar(&vtBandGUID, &vtShow, 0);
if (FAILED(hrx))
{
CString _str;
_str.Format("0x%x", hrx);
AfxMessageBox(_str);
}

	SysFreeString(vtBandGUID.bstrVal);
	pBrowser->Release();
}

}

leon de boer

It is what you asked for

_str.Format("0x%x", hrx);
AfxMessageBox(_str);

"0x%x" means put a 0x in front and return the hex and hence you get 0x80040100 IWebBrowser2::ShowBrowserBar returns either S_OK status or E_FAIL see the documentation http://msdn.microsoft.com/en-us/library/aa768268%28v=vs.85%29.aspx[^] So it is returning E_FAIL and the value is given. Now as to what the problem is I have suspicions on this line

vtShow.boolVal = TRUE;

Are you sure I thought these had to be lower case true or VARIANT_TRUE which is the same thing but definitely all Microsoft code I have ever seen uses VARIANT_TRUE If that isn't it I guess there is something with the GUID implementation and talk to Microsoft.

joshua0137

thank you for your help. i use VARIANT_TRUE and true, the problem keeps the same. and i copy the guid from msdn, it also keeps the same. anyone more suggestions?

Lost User

Hi, I see two errors: Leon de Boer is correct that you should set vtShow.boolVal to VARIANT_TRUE; I see another error... the third argument to ShowBrowserBar Function[^] should be a pointer to an empty VARIANT... not a NULL pointer.

VARIANT vtEmpty = {0};

Best Wishes, -David Delaune

joshua0137

thank your help info. i change the variable as code below, but the problem keeps the same:

IWebBrowser2 \*pBrowser = NULL;
// Ensure that our site is an browser window
HRESULT hr = m\_pBrowserApp->QueryInterface(IID\_IWebBrowser2, (void \*\*) &pBrowser);
if (!SUCCEEDED(hr))
	return;

// Display the band object (the Search bar in this case)
VARIANT vtBandGUID, vtShow;
vtBandGUID.vt = VT\_BSTR;
//把这里的CLSID换成你的工具条CLSID
vtBandGUID.bstrVal = SysAllocString(OLESTR("{30D02401-6A81-11D0-8274-00C04FD5AE38}"));
vtShow.vt = VT\_BOOL;
vtShow.boolVal = VARIANT\_TRUE;
VARIANT vtEmpty = {0};
hr = pBrowser->ShowBrowserBar(&vtBandGUID, &vtShow, &vtEmpty);
SysFreeString(vtBandGUID.bstrVal);
pBrowser->Release();

Lost User

Hi, Your code appears to be absolutely correct. The error you are encountering could be caused by the browser control not supporting explorer bars. Best Wishes, -David Delaune

joshua0137

thank you for you reply. i think the reason is as you pointed out. my enviroment:　windowsXP sp3 + IE8