C / C++ / MFC Discussion Boards

Re: How to open a browser window

Johnny ²19-Mar-03 0:45

Johnny ²

19-Mar-03 0:45

ShellExecute (NULL, "open", url, NULL, NULL, SW_SHOW);

Re: How to open a browser window

Jump_Around19-Mar-03 1:10

Jump_Around

19-Mar-03 1:10

Great thank you.

Could you give me a hint how to open this url in a new browser window, not in the already opened one.

Thanks in advance

Re: How to open a browser window

savaNT19-Mar-03 4:35

savaNT

19-Mar-03 4:35

ShellExecute (NULL, "open", "iexplore.exe" , "http://www.etc.com", NULL, SW_SHOW);
1) Better to type _T("string") instead "string"
2) The 3rd param is the program to "open" and the 4th param is the parameter for the 3rd
3) If you type
ShellExecute (NULL, "open", url_1, NULL, NULL, SW_SHOW);
Sleep(2000); // 2 seconds
ShellExecute (NULL, "open", url_2, NULL, NULL, SW_SHOW);
the web pages (1st,then 2nd) will be show on the same browser window.
The code line I suggest you will open multiple windows
4) Look in MSDN for "ShellExecute", in order to understand last parameter
(you can combine more atributes using '|' operator)
5) If your URL is not a constant string, make a variable:
CString strUrl;
...
ShellExecute (NULL, "open", (LPCTSTR)strUrl, ......)

Looking for a VC++ Sample for Wake up on LAN (WOL)?

Ralph18-Mar-03 23:48

Ralph

18-Mar-03 23:48

Hallo!
Is there anybody how knows, or even has, a VC++ sample (or a link for more details) how to create and send a MagicPacket to create a "Wake up on lan" event on an other PC!

Thanks a lot!
Ralph

Re: Looking for a VC++ Sample for Wake up on LAN (WOL)?

Scott H. Settlemier19-Mar-03 1:22

Scott H. Settlemier

19-Mar-03 1:22

Here's a short program [^]for doing this on linux. (discussed here[^])
It should be easy to port.

Re: Looking for a VC++ Sample for Wake up on LAN (WOL)?

Anonymous19-Mar-03 6:36

Anonymous

19-Mar-03 6:36

Thanks for your quick reply!
I'll try to code this in MFC and W2K, may be it works!

Wink | ;)

Ralph

references VS. data members

Makover18-Mar-03 23:37

Makover

18-Mar-03 23:37

Suppose I have class, what would be better - using references to deliver message between the member functions or declare the delivered objects as data members of the class?

class bla{
   public:
      ...
   private:
      Worker w; 
};

void func1() {
... 
func2(w); 
...
}


void func2(Worker& w) {
...
}

-----------------------
But what did I do?

Re: references VS. data members

Dave Bryant19-Mar-03 8:49

Dave Bryant

19-Mar-03 8:49

There is no one correct answer to this. In your first case, class bla actually owns the Worker object, and so this is apropriate if it is part of an aggregation relationship. The second case is appropriate where you do not own the object, but need to operate on it. Of course, if most of the class methods need a reference to the Worker object, you could declare a reference, not an object, inside the bla class.

If you can be more specific about what you are doing i might be able to give a more specific answer.

Dave

Re: references VS. data members

Makover19-Mar-03 8:55

Makover

19-Mar-03 8:55

Thank You Dave.

There is no "specific problem". I was just wondering Roll eyes | :rolleyes:

What you said seems very legitimate to me. In fact, I suspected this should be the consideration I should take. Do you have any idea if there is any difference in performance?

Thanks again Rose | [Rose]

-----------------------
But what did I do?

Re: references VS. data members

Dave Bryant19-Mar-03 9:09

Dave Bryant

19-Mar-03 9:09

There is a difference in performance, but the vast majority of the time it is irrelevant. Member functions actually have a hidden first parameter, which is the 'this' pointer. To access a member variable, they must retrieve the value at the address which is a known offset from this pointer.

If the variable is passed in as a parameter, it can be accessed more directly, because it is at a known address on the stack (or rather a known address relative to the current top of the stack). On most architectures, this will mean that accessing a member variable will take 1 instruction more than accessing a parameter - fairly inconsequential.

Dave

Analyzer of heads

calgonit18-Mar-03 22:53

calgonit

18-Mar-03 22:53

I need to make an analyzer of heads of methods in Visual C++, that is given a head of a method in a CString of the following way:

BOOL FichControl::CopyFile( const char *lpSrcFilename, const char *lpDestFilename, int nBuffersize )

I need to obtain each SubString that conforms the head (BOOL, FichControl, CopyFile, const char, *lpSrcFilename, ...)

Exists some form to do this, that is not crossing the CString of principle to aim character to character?

Thank you very much!

PD: Sorry for my bad English.

Re: Analyzer of heads

geo_m18-Mar-03 23:26

geo_m

18-Mar-03 23:26

I think, you can construct some regular expression to handle such a string parsing.
RegExp is a thingie, where you describe the format of string, it's parts etc. Then it can check if the supplied string matches the specified format, and the library is also able to parse the string for you to parts you specify. It allows you to specify optional parts of string (class specification e.g. FileControl::) and repeating (parameters - there can be zero or X parameters)

for some examples of regular expressions, you can look to: http://www.regexlib.com/[^]

There are a lot of available regexp libraries - in ATL7 is one, the class is named I guess CAtlRegExp or something like that. The boost library also provides some regular expression code.
Later on, when you will be happy with the construct, there are some tools around 'compiling' the regexp expression to the plain C (you will get some speedup)

hope this helps

String array passsing between VB and DLL

wavewave18-Mar-03 22:36

wavewave

18-Mar-03 22:36

How can a VB program pass an array of string by reference to a C DLL for updating and then return back to VB.

Most grateful if there is sample coding.

CHtmlView Popup

jeremysay18-Mar-03 22:18

jeremysay

18-Mar-03 22:18

Hello,
i work with CHtmlView in MDI project and i want to stop Popup window, so i do :

void CBrowserMDIView::OnNewWindow2(LPDISPATCH* ppDisp, BOOL* Cancel)<br />
{<br />
	// TODO : ajoutez ici votre code spécialisé et/ou l'appel de la classe de base<br />
<br />
        *Cancel = true;<br />
}

but with this code i block all new window, if the user click on link which open a new window, it is stoped by *Cancel = true;.
So how can i distinguish if OnNewWindow2 is called via script or by click ??

PS: excuse my poor english

Re: CHtmlView Popup

Neville Franks18-Mar-03 22:43

Neville Franks

18-Mar-03 22:43

I don't know if OnBeforeNavigate2() is called for popup windows, but if it is you can do the cancel there based on the lpszURL param.

Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program

Re: CHtmlView Popup

jeremysay19-Mar-03 2:10

jeremysay

19-Mar-03 2:10

Neville Franks wrote:
I don't know if OnBeforeNavigate2() is called for popup windows, but if it is you can do the cancel there based on the lpszURL param.
thx !
ok but how know if it is a desired popup (click on link) or a ad popup ?
could you more explain please

Re: CHtmlView Popup

Neville Franks19-Mar-03 4:02

Neville Franks

19-Mar-03 4:02

jeremysay wrote:
thx !
ok but how know if it is a desired popup (click on link) or a ad popup ?
could you more explain please

I can't help with that, other than to suggest you analyze the contents of the URL and make some decision based on that. Or ask the user.

Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program

Create controls in a dll ?

Brian van der Beek18-Mar-03 22:03

Brian van der Beek

18-Mar-03 22:03

I have a application with a view that has a tabctrl. The tabpages of this tabctrl are CDialog derived objects. There a several dll's that draw controls on these tabpages (I didn't think this up, my predecessor did Hmmm | :|

).

Anyhow, the problem is that some of the controls do not receive their messages. E.g. button controls do not receive BN_CLICKED, the same account for spinctrl's. But I can edit the fields of a editctrl. Also when I create an ownerdraw button the WM_DRAWITEM message can not be received.

When I create a similar control in the application itself then this control does receive it's messages. My predecessor create a 'sollution' by overriding the OnCommand of the TabCtrl. This does solve the BN_CLICKED problem but still I do not receive the ownerdraw messages. Anyone got a clue about how to solve this?

Re: Create controls in a dll ?

_Theo_19-Mar-03 0:50

_Theo_

19-Mar-03 0:50

There's a OnDrawItem command. Maybe if you override that one you will receive ownerdraw messages. I never use MFC though so I'm not sure about this Wink | ;)

Re: Create controls in a dll ?

Brian van der Beek19-Mar-03 1:04

Brian van der Beek

19-Mar-03 1:04

That does not work if the control does not receive it's messages.

Get Membername if ctrlid known

JensB18-Mar-03 20:58

JensB

18-Mar-03 20:58

Hi
think this is a bit difficult

i got the control-id passed through a function
with parameters: (UINT CtrlId)

but in that function i want to know the membername attached to that control.

Anyone knows?

Greetz
Jens

Re: Get Membername if ctrlid known

JensB18-Mar-03 21:36

JensB

18-Mar-03 21:36

never mind
i fixed my problem by using:
GetDlgItem(Ctrlid)

Potential bugs in Windows Media Player Control ???

DengJW18-Mar-03 20:45

DengJW

18-Mar-03 20:45

I placed one Media Player Control on a Dialogue using VC++6. However, during a movie playback, the Media Player will face problem while it plays under FULL SCREEN mode.

I could not figure it out? Anybody can help?

Now I am thinking to block any keyboard input while playback in progress. Any comments?

DJ

How to suspend system to s1 and s2

kaichen18-Mar-03 20:37

kaichen

18-Mar-03 20:37

Dear all:

i want to write a program to suspend system to s1 and s2, but i can't find the api, i uses

SetSystemPowerState(1, 0) ---> suspend to s3
SetSystemPowerState(0, 0) ----> suspend to s4

but how can i suspend system to s1 and s2 ?

thx for ur help

IDE question

Jack Handy18-Mar-03 20:19

Jack Handy

18-Mar-03 20:19

Is there a way to get VS 6.0 (VC++) to recognize *.cc as a C++ file? I am required to use this extension for work. As it is now, it doesn't use syntax highlighting or any of the other nifty stuff.

Thanks,

Jack

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