Re: xp style dialogbox - C / C++ / MFC Discussion Boards

JamesPrevallet27-Sep-01 11:20

27-Sep-01 11:20

The amazing yet ellusive ->* operator appears to require an object of a known type. Suppose you want to call a member function of an arbitrary object?

For example, in the creation of a service, I designed an interface to allow consumers to pass in a "this" pointer and their callback function. What's the recommended way to dish up the program counter to them when all I have are these two items?

void *pThis;
typedef BOOL (CALLBACK * LPFGETMESSAGE)(IN EMS_HANDLE hSentMessage,
IN CString &Body,
IN BOOL bSuccess);

I have no way to find out what type of object "pThis" is, nor do I WANT to know.

Best of,
James Prevallet
http://www.mp3.com/JamesPrevallet

Re: Pointer to Member Operator?

Anders Molin27-Sep-01 11:56

Anders Molin

27-Sep-01 11:56

You can make a generic baseclass, with a virtual callback function, that your costumers have to inherit from.

Then, instead of void *pThis;
you can say MyBaseClass *pThis;
pThis->CallBackFunction();

- Anders

Money talks, but all mine ever says is "Goodbye!"

sleep command URGENT

27-Sep-01 9:58

Hi,
I have used the sleep command in turbo.c but it does not seem to work from VC++. Does anyone know what would be the equivalent in VC++. I am writing a basic program with a single main routine and no 'event driven' based system.

Please reply by email to aggarwa1@uiuc.edu

Thanks,
Nitin

Re: sleep command URGENT

Anders Molin27-Sep-01 10:31

Anders Molin

27-Sep-01 10:31

I have used Sleep() and SleepEx() a lot and it works fine from VC++ Smile | :)

Just remember to include windows.h

- Anders

Money talks, but all mine ever says is "Goodbye!"

Cursors

27-Sep-01 9:42

I'm trying to change the cursor when a button is pressed using the code:

HCURSOR sampleCursor;
::SetCapture(this->m_hWnd);
sampleCursor = ::SetCursor(AfxGetApp()->LoadCursor(IDC_SAMPLECURSOR));

The problem I'm having is that after the button is pressed, the cursor is changed but control is not returned to the window . Any suggestions? Thanks.

Re: Cursors

Christian Graus27-Sep-01 12:19

Christian Graus

27-Sep-01 12:19

Change it by handling WM_SETCURSOR instead, that's what it's for.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

xp style dialogbox

bobby27-Sep-01 6:32

bobby

27-Sep-01 6:32

Is there some info as to developing xp style dialogs

Thanks
Bobby Smile | :)

Re: xp style dialogbox

Michael Dunn27-Sep-01 8:32

Michael Dunn

27-Sep-01 8:32

Do you mean having your dialog reflect the current theme? If so, that requires putting an XML file ("manifest") in your resources so that the OS gives you common control v6 and theme features. There's an article here at CP that shows the XML you need.

--Mike--
http://home.inreach.com/mdunn/
Trillian: What are you supposed to do with a manically depressed robot?
Marvin: You think you've got problems. What are you supposed to do if you are a manically depressed robot?

Re: xp style dialogbox

bobby27-Sep-01 8:57

bobby

27-Sep-01 8:57

Hi Mike,

Thanks for the info. I found this link
http://www.codeproject.com/useritems/xptheme.asp
but it says it will only work for XP. Frown | :-(

Re: xp style dialogbox

Anders Molin27-Sep-01 9:31

Anders Molin

27-Sep-01 9:31

On XP it looks like (is) a real XP application with the current theme and all, when running under older versions of Windows it look like standard applications on those...

- Anders

Money talks, but all mine ever says is "Goodbye!"

hooks --dll URGENT

27-Sep-01 6:15

hello,

i would to like to store the menu item name whenever i click the menu item name(string type of menu item ) by sitting in one appllication and record all menu items names in all applications like word ,excel,notepad,wordpad etc..

for this task ,i used global hooks, i got only menu name not the menu item name... will pl. give any suggestion or code ...
waiting for ur reply soon ...

InternetExplorer - BeforeNavigate2

27-Sep-01 5:51

Hi
About 2 threads ago I asked how to compile my dll which works as a Browser Helper Object with InternetExplorer.
Now it works fine, although I have one question. I searched www.google.com and other sites but did not find an answer (only how to do with VisualBasic Frown | :(

My question is how to handle the BeforeNavigate2 event.

What I have so far is as follows:

STDMETHODIMP CIEHlprObj::BeforeNavigate2(IDispatch *pDisp, VARIANT *url, VARIANT *Flags, VARIANT *TargetFrameName, VARIANT *PostData, VARIANT *Headers, VARIANT_BOOL *Cancel) 
{
        return S_OK;
}

I want to be able to cancel the navigation if the user entered a restricted site.
Furthermore I want to change the url in order to redirect the navigation to a different site

how can I do this Confused | :confused:

thanks in advance

Re: InternetExplorer - BeforeNavigate2

Carlos Antollini27-Sep-01 6:49

Carlos Antollini

27-Sep-01 6:49

STDMETHODIMP CIEHlprObj::BeforeNavigate2(IDispatch *pDisp, VARIANT *url, VARIANT *Flags, VARIANT *TargetFrameName, VARIANT *PostData, VARIANT *Headers, VARIANT_BOOL *Cancel) 
{  
CString TheBestURL = _T("http://www.codeproject.com");
*Cancel = TRUE;
Navigate2(TheBestURL);      
return S_OK;
}

Cheers!!!! Big Grin | :-D

Carlos Antollini.

Re: InternetExplorer - BeforeNavigate2

27-Sep-01 6:54

Hey great!!!! THANKS!!! Smile | :)

And how can I find out what the url is the browser wants to navigate to?
What do I need to do with the VARIANT *url? Confused | :confused:

I also want to change the *url to redirect the browser to a different site

Re: InternetExplorer - BeforeNavigate2

Not Active27-Sep-01 6:56

Not Active

27-Sep-01 6:56

That is the URL being navigated to.

Re: InternetExplorer - BeforeNavigate2

27-Sep-01 7:09

I know, but it is of type VARIANT.
How can I convert it into a "readable" format like char?
And how can I modify the variable *url?

Re: InternetExplorer - BeforeNavigate2

27-Sep-01 7:23

u can use this : CString strUrl = CString(URL->bstrVal);

Re: InternetExplorer - BeforeNavigate2

27-Sep-01 7:28

My DLL does not use MFC extension, therefore CString does not work Frown | :(

And how can I modify the variable "url"?
(for example like url = "something") Confused | :confused:

Re: InternetExplorer - BeforeNavigate2

Erik Thompson27-Sep-01 7:35

Erik Thompson

27-Sep-01 7:35

The variant holds all kinds of types. check to see if the url.vt == VT_BSTR (it will or it will be VT_BYREF|VT_BSTR) then you can use the url.bstrVal (or if byref url.pbstrVal) to see the url which will be a unicode string.

if (!wcscmp(bstrVal, "http://thesitetheyshouldnotgoto.com")
{
   SysFreeString(url.bstrVal);
   url.bstrVal = SysAllocString("http://younaughtyuser.com");
}

Cheers,
-Erik
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
My thoughts are my own and reflect on no other.

Re: InternetExplorer - BeforeNavigate2

27-Sep-01 7:51

I don't know whether I understand what you mean.
Here is what I have so far

STDMETHODIMP CIEHlprObj::BeforeNavigate2(IDispatch *pDisp, VARIANT *url, VARIANT *Flags, VARIANT *TargetFrameName, VARIANT *PostData, VARIANT *Headers, VARIANT_BOOL *Cancel) 
{
	if(url->vt == VT_BSTR)
	{
		if (!wcscmp(url->bstrVal, "http://thesitetheyshouldnotgoto.com"))
		{  
			SysFreeString(url->bstrVal); 
			url->bstrVal = SysAllocString("http://younaughtyuser.com");
		}
	}
	if(url->vt == VT_BSTR | VT_BYREF)
	{
		if (!wcscmp(url->pbstrVal, "http://thesitetheyshouldnotgoto.com"))
		{  
			SysFreeString(url->pbstrVal); 
			url->pbstrVal = SysAllocString("http://younaughtyuser.com");
		}
	}
	
	return S_OK;
}

But I get 5 compiler errors and 1 warning Frown | :(

Re: InternetExplorer - BeforeNavigate2

Erik Thompson27-Sep-01 10:58

Erik Thompson

27-Sep-01 10:58

Well since you haven't given the compiler errors I can only venture to guess that the reason is you are doing string compares of unicode vs ansi strings. For example in the code in your previous message you state

if (!wcscmp(url->bstrVal, "http://thesitetheyshouldnotgoto.com"))
{
SysFreeString(url->bstrVal);
url->bstrVal = SysAllocString("http://younaughtyuser.com");
}

It should be

if (!wcscmp(url->bstrVal, L"http://thesitetheyshouldnotgoto.com"))
{
SysFreeString(url->bstrVal);
url->bstrVal = SysAllocString(L"http://younaughtyuser.com");
}

I probably forgot the "L" in my sample above. that would account for 4 of the errors. What's the fifth?

Cheers,
-Erik
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
My thoughts are my own and reflect on no other.

Re: InternetExplorer - BeforeNavigate2

Carlos Antollini27-Sep-01 8:19

Carlos Antollini

27-Sep-01 8:19

You have the URL in url.bstrval
And you can redirect the Browser with Navigate2.

But A question, you want to control the IE or you ar making your own Explorer???

Cheers!!!

Carlos Antollini.

Re: InternetExplorer - BeforeNavigate2

27-Sep-01 8:32

url.bstrval is of type unsigned short*, isn't it?
How to convert to char?

I have this code so far:

CComVariant varURL(url->bstrVal);
varURL.ChangeType(VT_BSTR);

??? << OLE2T(varURL);

I need a variable for "???"

I want to control the IE

Re: InternetExplorer - BeforeNavigate2

Carlos Antollini27-Sep-01 8:41

Carlos Antollini

27-Sep-01 8:41

First
I always do that in this mode:

CString str = _T("");
str = vtFld.bstrVal;

Second
If you want to control the IE, read the answer that Michael Dunn posted you...

Best Regards!!! Big Grin | :-D

Carlos Antollini.

Re: InternetExplorer - BeforeNavigate2

Michael Dunn27-Sep-01 8:12

Michael Dunn

27-Sep-01 8:12

Check out KB article Q179230 which contains a complete BHO sample, including how to grab the URL and how to cancel navigation.

--Mike--
http://home.inreach.com/mdunn/
Trillian: What are you supposed to do with a manically depressed robot?
Marvin: You think you've got problems. What are you supposed to do if you are a manically depressed robot?

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