C / C++ / MFC

Re: MFC Application in Different Resolution

15-Apr-08 3:44

You can use of WM_SIZE and MoveWindow or SetWindowPos.

Iain Clarke, Warrior Programmer15-Apr-08 5:41

Iain Clarke, Warrior Programmer

15-Apr-08 5:41

There are loads of articles on codeproject that relate to this.

They're aimed at windows that change size as the user drags the edges with the mouse, but that's no different in principle.

If you mean the dpi changes, then you can MapDialogRect to make your app like a dialog box, and change size proportional to DPI.

Iain.

Iain Clarke appears because ^CPallini still cares.

Why do IWebBrowser2::Navigate2 return E_FAIL?

Johann Gerell15-Apr-08 3:01

Johann Gerell

15-Apr-08 3:01

Couldn't get any input from the "Mobile Development" board, so now I turn to the COM giants here Roll eyes | :rolleyes:

The docs on this are sparse, to say the least...

My problem: I'm trying to embed a WebBrowser object in a Windows Mobile application. I can create it and query its size and window handle, but IWebBrowser2::Navigate2 fails with E_FAIL.

Can anyone give me any hints to why it fails?

Code (yes, C++):

My host control is declared like this:

class HtmlControl : public Window // Window wraps an HWND.
{
public:
	HtmlControl(HWND window)
	: Window(window)
	, iOleObject_(NULL)
	{
		iOleSite_.host = this;
		iOleFrame_.host = this;
		CreateWebControl();
	}

	Site iOleSite_;
	Frame iOleFrame_;
	IOleObject* iOleObject_;              // The WeBrowser object.

private:
	void CreateWebControl();
};

Where Site and Frame are declared like this:

struct Site : public IOleClientSite,
              public IOleInPlaceSite
{
	HtmlControl* host;

	// IUnknown
	STDMETHODIMP QueryInterface(REFIID riid, void** ppvObject);
	STDMETHODIMP_(ULONG) AddRef();
	STDMETHODIMP_(ULONG) Release();
	
	// IOleClientSite
	STDMETHODIMP SaveObject();
	STDMETHODIMP GetMoniker(DWORD dwAssign, DWORD dwWhichMoniker,
	                        IMoniker** ppmk);
	STDMETHODIMP GetContainer(LPOLECONTAINER FAR* ppContainer);
	STDMETHODIMP ShowObject();
	STDMETHODIMP OnShowWindow(BOOL fShow);
	STDMETHODIMP RequestNewObjectLayout();
	
	// IOleWindow
	STDMETHODIMP GetWindow(HWND FAR* lphwnd);
	STDMETHODIMP ContextSensitiveHelp(BOOL fEnterMode);
	
	// IOleInPlaceSite methods
	STDMETHODIMP CanInPlaceActivate();
	STDMETHODIMP OnInPlaceActivate();
	STDMETHODIMP OnUIActivate();
	STDMETHODIMP GetWindowContext(LPOLEINPLACEFRAME FAR* lplpFrame,
	                              LPOLEINPLACEUIWINDOW FAR* lplpDoc,
	                              LPRECT lprcPosRect,
	                              LPRECT lprcClipRect,
	                              LPOLEINPLACEFRAMEINFO lpFrameInfo);
	STDMETHODIMP Scroll(SIZE scrollExtent);
	STDMETHODIMP OnUIDeactivate(BOOL fUndoable);
	STDMETHODIMP OnInPlaceDeactivate();
	STDMETHODIMP DiscardUndoState();
	STDMETHODIMP DeactivateAndUndo();
	STDMETHODIMP OnPosRectChange(LPCRECT lprcPosRect);
};

struct Frame : public IOleInPlaceFrame
{
	HtmlControl* host;

	// IUnknown
	STDMETHODIMP QueryInterface(REFIID riid, void** ppvObject);
	STDMETHODIMP_(ULONG) AddRef();
	STDMETHODIMP_(ULONG) Release();
	
	// IOleWindow
	STDMETHODIMP GetWindow(HWND FAR* lphwnd);
	STDMETHODIMP ContextSensitiveHelp(BOOL fEnterMode);
	
	// IOleInPlaceUIWindow
	STDMETHODIMP GetBorder(LPRECT lprectBorder);
	STDMETHODIMP RequestBorderSpace(LPCBORDERWIDTHS pborderwidths);
	STDMETHODIMP SetBorderSpace(LPCBORDERWIDTHS pborderwidths);
	STDMETHODIMP SetActiveObject(IOleInPlaceActiveObject* pActiveObject,
	                             LPCOLESTR pszObjName);
	
	// IOleInPlaceFrame
	STDMETHODIMP InsertMenus(HMENU hmenuShared,
	                         LPOLEMENUGROUPWIDTHS lpMenuWidths);
	STDMETHODIMP SetMenu(HMENU hmenuShared, HOLEMENU holemenu,
	                     HWND hwndActiveObject);
	STDMETHODIMP RemoveMenus(HMENU hmenuShared);
	STDMETHODIMP SetStatusText(LPCOLESTR pszStatusText);
	STDMETHODIMP EnableModeless(BOOL fEnable);
	STDMETHODIMP TranslateAccelerator(LPMSG lpmsg, WORD wID);
};

The implementations of Site and Frame will be provided if needed, so that this space isn't cluttered too much.

So, the interesting function here is HtmlControl::CreateWebControl(). Let's walk it through, so that the possible strangeness of the IWebBrowser2::Navigate2 failure can be better seen.

First, an instance of the WebBrowser COM object is created and its associated IOleObject is retrieved:

IUnknown* iUnknown = NULL;
HRESULT hr = ::CoCreateInstance(CLSID_WebBrowser,
                                NULL,
                                CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER,
                                IID_IUnknown,
                                (void*)(&iUnknown));
VERIFY(SUCCEEDED(hr));

hr = iUnknown->QueryInterface(IID_IOleObject, (void*)(&iOleObject_));
VERIFY(SUCCEEDED(hr));

These operations were all successful in the sense that hr == S_OK.

After getting the WebControl object, I want to show/activate it using our IOleClientSite implementation:

hr = iOleObject_->SetClientSite(&iOleSite_);
VERIFY(SUCCEEDED(hr));

const RECT rect = GetClientRect();
hr = iOleObject_->DoVerb(OLEIVERB_SHOW, NULL, &iOleSite_, 0, GetHwnd(), &rect);
VERIFY(SUCCEEDED(hr));

These operations were also successful in the sense that hr == S_OK. However, the end result (the IWebBrowser2::Navigate2 failure) occurs also if OLEIVERB_SHOW is changed to OLEIVERB_UIACTIVATE or OLEIVERB_INPLACEACTIVATE.

Next, I dig the IWebBrowser2 out of the WebControl object and checks if the browser HWND is sane:

IWebBrowser2* iWebBrowser = NULL;
hr = iOleObject_->QueryInterface(IID_IWebBrowser2, (void**)&iWebBrowser);
VERIFY(SUCCEEDED(hr));

// Get browser HWND, method	1.
HWND hwndBrowser = NULL;
hr = iWebBrowser->get_HWND((long*)&hwndBrowser);
VERIFY(SUCCEEDED(hr));
VERIFY(hwndBrowser != NULL);
VERIFY(::GetParent(hwndBrowser) == GetHwnd());

// Get browser HWND, method	2.
IOleWindow* iOleWindow = NULL;
hr = iOleObject_->QueryInterface(IID_IOleWindow, (void*)(&iOleWindow));
VERIFY(SUCCEEDED(hr));

hwndBrowser = NULL;
hr = iOleWindow->GetWindow(&hwndBrowser);
VERIFY(hwndBrowser != NULL);
VERIFY(::GetParent(hwndBrowser) == GetHwnd());

Again, these operations were successful in the sense that hr == S_OK. Also, the browser HWND is equal in both method 1 and 2 and its parent is indeed our host control. I see this as some kind of indication that something works.

But... the thing I need doesn't work; the precious IWebBrowser2::Navigate2:

VARIANT vURL;
vURL.vt = VT_BSTR;
vURL.bstrVal = ::SysAllocString(L"about:blank");

VARIANT vEmpty;
vEmpty.vt = VT_EMPTY;

hr = iWebBrowser->Navigate2(&vURL, &vEmpty, &vEmpty, &vEmpty, &vEmpty);
VERIFY(SUCCEEDED(hr));

Now I get hr == E_FAIL.

I cannot really see the problem, since everything up to this point worked successfully, and the last call seems trivial.

Is anyone still around all the way down here with some guess as to what might be going on?

Thanks for any input!

--
Time you enjoy wasting is not wasted time - Bertrand Russel

Re: Why do IWebBrowser2::Navigate2 return E_FAIL?

Jim Crafton15-Apr-08 8:49

Jim Crafton

15-Apr-08 8:49

There's a article here on how to host the web browser via C code and the author does an *EXCELLENT* job of walking you through exactly what has to happen - try and look for that, maybe it will off you hints as to what's missing.

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Re: Why do IWebBrowser2::Navigate2 return E_FAIL?

Jim Crafton15-Apr-08 8:56

Jim Crafton

15-Apr-08 8:56

PS if you can't find the article I wrote code for C++ on the desktop (don't know how applicable it is to embedded) that does wrap the web browser:
Win32WebBrowserHost.h[^]

Maybe that will help a bit?

how can i create icon dynamically in system tray ..

vasu_sri15-Apr-08 2:54

vasu_sri

15-Apr-08 2:54

hi,

we can display icons in system tray. but i want to display an icon as number in system tray. how can i create an number icon in a system tray or dynamically?

or any way to create an icon dynamically?

Regards,
Srinivas

Re: how can i create icon dynamically in system tray ..

enhzflep15-Apr-08 3:18

enhzflep

15-Apr-08 3:18

Here ya'are, this code'll do it.
http://www.codeproject.com/KB/shell/DynIcon.aspx[^]

Re: how can i create icon dynamically in system tray ..

Iain Clarke, Warrior Programmer15-Apr-08 5:46

Iain Clarke, Warrior Programmer

15-Apr-08 5:46

enhzflep wrote:
Here ya'are, this code'll do it.

There really are nuggets of gold here on this site, eh...

Iain.

Iain Clarke appears because ^CPallini still cares.

Re: how can i create icon dynamically in system tray ..

enhzflep15-Apr-08 5:59

enhzflep

15-Apr-08 5:59

Sure are mate. I'd hate to imagine what it would cost if I'd been required to pay for all that I've learned from this wonderful site.
You've certainly contributed to that which I know Iain.

Thanks All. Rose | [Rose]

Simon.

The easiest way to make the world a better place is to refuse to help those that wreck it....

deleting folder containting files

neha.agarwal2715-Apr-08 1:52

neha.agarwal27

15-Apr-08 1:52

Hi all,

I have a folder and in that i have some files, i want to delete that folder with files and for doing so i am using RemoveDirectory api....

but it is not deleting my folder...

How can i do it????

Thanks in advance

Shirani15-Apr-08 1:59

Shirani

15-Apr-08 1:59

Try this in CMD

rd /s FOLDER

i think it will work

Regards:
Xohaib Shirani

neha.agarwal2715-Apr-08 2:04

neha.agarwal27

15-Apr-08 2:04

But i want to do it through coding...

David Crow15-Apr-08 7:35

David Crow

15-Apr-08 7:35

While you can do what Shirani's suggests via code, it's definitely the wrong aproach.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

kakan15-Apr-08 2:04

kakan

15-Apr-08 2:04

See Here[^]

Edit: Sorry, that was the CE-version.
See Here instead[^]

An interesting piece of information from that page is:
To recursively delete the files in a directory, use the SHFileOperation function.

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Hamid_RT15-Apr-08 2:06

15-Apr-08 2:06

See SHFileOperation/rmdir or deletefile.

toxcct15-Apr-08 2:06

toxcct

15-Apr-08 2:06

have you only checked the API Documentation[^] ?

"lpPathName : The path of the directory to be removed. This path must specify an empty directory, and the calling process must have delete access to the directory. "

down further the page, you can see this :
"To recursively delete the files in a directory, use the SHFileOperation[^] function."

next time, google before asking please

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platso_58815-Oct-12 23:18

platso_588

15-Oct-12 23:18

I like to Delete folder in any case even if other applications or other users are accessing the same folder. Forcefully i like to delete the Folder. I receive Error 32 when the function SHFileOperation(). Can any one tell me how can i acheive this.

processes and handles

YS888815-Apr-08 1:36

YS8888

15-Apr-08 1:36

hi I need to write a program that needs to "steel" the data that appers on a control box of a diffrent program.
I saw how the SPY programs here are built but they all need a user interface to point to that control.
I want to go throgh all the process that are running and check if what i want is there and then get it's handle.
Visual studio spy++ does something like that. but how???
please help me i am trying to fins a solution for a long time.
Thank you Unsure | :~

Hamid_RT15-Apr-08 1:52

15-Apr-08 1:52

Do you want to make a program like SPY++?

YS888815-Apr-08 2:28

YS8888

15-Apr-08 2:28

i want i program that will tell me what is the value in the calculator(for example) text box. the UI shouls be output only.

the way i thought of doing this was to go through all the process and when i reach to right one check it's window handle's. but i don't how to get the process's list and how to get the handles from the process.

Hamid_RT15-Apr-08 2:54

15-Apr-08 2:54

For start you can use EnumWindows for get handle for each process and for more functions that you will be help them see Process and Thread Functions[^].

David Crow15-Apr-08 7:36

David Crow

15-Apr-08 7:36

YS8888 wrote:
i want i program that will tell me what is the value in the calculator(for example) text box.

Or maybe a password text box?? Wink | ;)

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Hamid_RT15-Apr-08 8:08