Re: STL or MFC - ATL / WTL / STL Discussion Boards

Steve S29-Nov-04 22:27

29-Nov-04 22:27

Check out __declspec(dllexport) and __declspec(dllimport).
If you use the Application Wizard to generate a DLL, it produces an example you can then extend.

The "#import" is for COM objects, and for individual functions, won't work, although you could use __declspec(dllexport) in the definition of MyFunc(), and then use either an import library or LoadLibrary/GetProcAddress to call the function.

Steve S
Developer for hire

Re: Using ATL Dll?

sinall5-Dec-04 0:08

sinall

5-Dec-04 0:08

ATL support you to export interface not class.
You can add a object to your com,then insert your function to this com.
If you insist on passing object across atl dll,you can see this article:
http://www.codeguru.com/Cpp/COM-Tech/atl/atl/article.php/c3587/[^]

CListViewCtrl and swapping items

retro_coder28-Nov-04 21:28

retro_coder

28-Nov-04 21:28

Hi,

I have a CListViewCtrl with images and am trying to add two buttons: "Move Up" and "Move Down" that move a selected row in the CLIstViewCtrl. I am currently "swapping" rows in the ctrl by deleting and adding rows at each position with the other's contents. The problem with this method is that in my case I need to know what the contents in the row are to display the proper image.

Maybe I am totally missing something but is there a more general way to do this, e.g. a simple swap function Smile | :)

or some methods to get at the underlying row data.

Thanks in advance.

Using DirectX with WTL?

_leech_27-Nov-04 12:34

_leech_

27-Nov-04 12:34

If anyone can point me to where i can learn about using DirectX with WTL it would be greatly appreciated. There doesn't seem to be much info on this in the WTL section (except for the CGameLoop article).

Thanks.

Re: Using DirectX with WTL?

Andrew Walker27-Nov-04 21:24

Andrew Walker

27-Nov-04 21:24

Although not WTL, there are some good articles available for setting up DirectX with MFC. This article was invaluable setting up a frameworks for use with MFC and Win32.

You'll need to handle at least:
Getting the window handle for the target window
Doing the DirectX initialisation (DX samples)
Handle an idle or timer message to trigger a render / physics update
Handle the window creation message
Handle a window resize message
Handle the on erase background message

[edit: corrected link]

STL or MFC

Shlomi BH27-Nov-04 9:22

Shlomi BH

27-Nov-04 9:22

Hello all!!!

I need to choose MFC class CList or STL list.
When do I choose MFC and when do I choose STL?.
Please, if someone can help me what are the benefits and what are the lacks.

Regards,
Shlomi

Re: STL or MFC

Neville Franks27-Nov-04 9:34

Neville Franks

27-Nov-04 9:34

If at all possible use STL. I shied away from STL for quite some time while learning MFC, which looking back was a mistake. STL takes a bit of hit learning but is great once you do, and of course it is portable, unlike MFC.

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: STL or MFC

Kevin McFarlane27-Nov-04 23:52

Kevin McFarlane

27-Nov-04 23:52

Unless there are convenient reasons not to, e.g., interacting with MFC serialization, I would go for STL. STL is generally much more powerful. As Neville says below there is a learning curve but it's worth it. Plus I found that STL was easier to use than it was to understand!

I often use CString in preference to string in an MFC app. because it makes for easier interaction with MFC controls, etc., and it has better functionality. For everything else I go for STL these days.

Kevin

Re: STL or MFC

Shlomi BH28-Nov-04 6:43

Shlomi BH

28-Nov-04 6:43

Hi fellows,

Thank you for your lovely help.

Regards,
Shlomi

TAB not working properly within WebBrowser control embedded in modeless dialog box encapsulated in a ATL dll

sashishk26-Nov-04 0:53

sashishk

26-Nov-04 0:53

Hi,

I have created an ATL dll which has a modeless dialog box containing a WebBrowser control. My problem is that whenever I'm pressing TAB key over the WebBrowser control, the focus is not shifting to other controls or links within the web page which is getting displayed within the control.

I have implemented a hook to trap WH_GETMESSAGE message, after that I'm able to get response from the 4 arrow keys and TAB key, but that too within the dialog box.

I have to make the TAB key acting normal within the WebBrowser control that is within that dialog box.

Can anyone of you help me out? Thanks in advance.

Regards,
Ashish

Re: TAB not working properly within WebBrowser control embedded in modeless dialog box encapsulated in a ATL dll

Michael Dunn27-Nov-04 8:48

Michael Dunn

27-Nov-04 8:48

The short answer is that the dialog owner needs to forward keystrokes to the CAxWindow that ATL uses to host the WB control. If you get the WTL AppWizard and use it to make a modeless dialog-based app, you'll see the necessary code in the generated PreTranslateMessage().

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb

A problem w/ ATL web server - URGENT !!!

De Nardis Andrea25-Nov-04 22:04

De Nardis Andrea

25-Nov-04 22:04

Hi all,
I have really big problem w/ my web servervice.
I implemented the web server w/ ATL, so now I have a Cws ATL class that implements the web service and a CwsIsapi that implements the ISAPI extension. Then I am consuming this web service in C#.

/////////////////////// ATL WEB SERVER /////////////////////////

<br />
class Cws<br />
{<br />
[soap_method]<br />
HRESULT init (/*[in]*/ int num) {<br />
    m_mem = num;<br />
    return S_OK;<br />
};<br />
[soap_method]<br />
HRESULT get_number (/*[out]*/ int *val)<br />
{<br />
    *val = num;<br />
    return S_OK;<br />
}<br />
protected:<br />
    int m_mem;<br />
};<br />

/////////////////////////////// C# CONSUMER ///////////////////////////////////////////

<br />
...<br />
mymachine.Cws service = new mymachine.Cws ();<br />
service.init (3);<br />
int val;<br />
service.get_number (out val);<br />
if (val != 3)<br />
{<br />
    //error:  THIS ALWAIS HAPPEN<br />
}<br />
...<br />

This code DOES NOT WORK !!!
In fact when
"service.get_number (out val)"
is invoked, an instance of Cws is created then destroyed, so when
"service.get_number (out val)"
is invoked, the instance is different and m_mem is not initialized to 3 any more !!!
Is there any way in order to change this behaviour?
Any help will be appreciated.
Thanx very much.
Regards,
Andrea

Re: A problem w/ ATL web server - URGENT !!!

Nicholas Cardi6-Dec-04 8:04

Nicholas Cardi

6-Dec-04 8:04

Web services are a stateless RPC protocol. After the call is finished the instance is destroyed. There is a way to enable session state in web services but I don't know how to do it in ATL. Information on How To Enable session state in a C# Web service is located at the following link.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconstatemanagementinaspnetwebservices.asp

Best of luck

Forever Developing

Using ATL DLL.

dSolariuM25-Nov-04 18:59

dSolariuM

25-Nov-04 18:59

Hello,
I have created a Dll by ATL and I want
to #import it in my MFC App.
How can I use the classes inside my DLL?
Best Wishes,
Thanks.

Re: Using ATL DLL.

Dimitris Vasiliadis25-Nov-04 20:32

Dimitris Vasiliadis

25-Nov-04 20:32

If you want to use the classes take a look at:
http://msdn.microsoft.com/library/en-us/vccore/html/_core_mutual_imports.asp?frame=true[^]
http://msdn.microsoft.com/library/en-us/vccore/html/_core_import_into_an_application_using___declspec.28.dllimport.29.asp?frame=true[^]

...Plug & Pray... Dead | X|

Passing a control

John R. Shaw24-Nov-04 13:39

John R. Shaw

24-Nov-04 13:39

Some years ago I was fourced to write a VB program that required TAPI support for data modem. Well now I have to fix it since the PDQTapi control has a bug in it that crashes crashes (closes) the program when the a HangUp command is issued (On Win2000/XP). I have written a C++ class to replace it and am writing an ActiveX control (using ATL) as a drop in replacement.

Problem (in VB): PlaceCall(varControl,szPhone As String)
PDQTapi.PlaceCall(PDQCom,szPhone)

Questions:
1) What argument (PDQComm) type do I specify to allow a control to be passed to the new control.
2) There is anouther method that can take any control type as long as it has a SetItem method.

My ATL 3.0 COM book does not seem to have the answer, but I am still looking there and on the net.

Thanks for any help you can give.

TaTa!

INTP

Re: Passing a control

John R. Shaw24-Nov-04 13:55

John R. Shaw

24-Nov-04 13:55

I just realize that it is probably a VARIANT or VARIANTARG.

INTP

Re: Passing a control

Steve S24-Nov-04 22:25

Steve S

24-Nov-04 22:25

Yup. Typically, you QI the control for IUnknown or IDispatch, and set the variant type accordingly (VT_UNKNOWN, VT_DISPATCH).

Steve S
Developer for hire

Explorer extension dll - WM_SHUTDOWN

AssemblySoft24-Nov-04 0:46

AssemblySoft

24-Nov-04 0:46

Hi, I have a dll that runs in the address space of Explorer. (Shell extension)
So i do not have a main app, just a dll. I could use either MFC or ATL.

My problem is i need to know when a Windows Shutdown event is being fired. I've never had this problem before because all my apps have a main window and receive this notification. However the dll just keeps working and terminates in an undetermined state.

I can't have the dll called from an app. I have no alternative but to use what i've got.

how can i register to receive a WM_SHUTDOWN event from my dll?

Please don't suggest i change the design of the solution. I'm confined to what i have.

thanks in advance

Carl

Re: Explorer extension dll - WM_SHUTDOWN

Igor Vigdorchik24-Nov-04 10:00

Igor Vigdorchik

24-Nov-04 10:00

You may try to use a Windows hook - WH_GETMESSAGE or WH_CALLWNDPROC and monitor WM_ENDSESSION message.
Just a thought...

Re: Explorer extension dll - WM_SHUTDOWN

AssemblySoft24-Nov-04 22:57

AssemblySoft

24-Nov-04 22:57

Igor, where were you yesterday?
That's exactly what i did and it gives me the desired notification. - thanks.

I would be interested in another method though if you have any thoughts.

Kind Regards

Carl

How to embeded a button onto the FlexGrid Cell?

bohrium23-Nov-04 23:34

bohrium

23-Nov-04 23:34

I would like to insert some controls (such as button or combo box) into
the cell of the ActiveX FlexGrid in MFC, How can I do it?
I found there is really not much resource about the FlexGrid on the Web.

VB ActiveX into ATL project

Brian Gould23-Nov-04 20:24

Brian Gould

23-Nov-04 20:24

Hello!

I'm trying to insert an ActiveX control written in VB into an ATL program. I've got it inserted, but can't execute any methods.

Here's the relevant Code:

BOOL CPageMarksBar::RegisterAndCreateWindow()
{
RECT rect;
::GetClientRect(m_hWndParent, &rect);

m_hWnd = ::CreateWindow(TEXT("STATIC"),
TEXT("Insert ActiveX Control Here"),
WS_CHILD | WS_VISIBLE | SS_CENTER,
rect.left, rect.top,
rect.right - rect.left,
rect.bottom - rect.top,
m_hWndParent,
NULL,
NULL,
NULL);

USES_CONVERSION;
CComPtr<IUnknown> spUnk;
CComPtr<IUnknown> spOut;

HRESULT hRet = AtlAxCreateControlEx(T2COLE("ActiveLinksControl.ActiveLinks"), m_hWnd, NULL, &spUnk, &spOut, IID_NULL, NULL);

HRESULT hrQI1 = spOut.QueryInterface(&m_pAlinks);

return ::IsWindow(m_hWnd);
}

I've also added:

#import "ActiveLinksControl.ocx" named_guids,raw_interfaces_only
using namespace ActiveLinksControl;

---

Now, this contains a class ActiveLinks, which I've tried to access, but I keep getting errors like "error C2027: use of undefined type 'ActiveLinks'error C2027: use of undefined type 'ActiveLinks'" and "Undeclared identifier"

Please help, because this is really annoying!!!

Best Regards,

David G

Did you realise that Watford Junction is the only station in East Anglia served by Virgin Trains.

Which collection class to use?

paulb23-Nov-04 19:02

paulb

23-Nov-04 19:02

I have a set of int's and string's that have a one-to-one relationship with each other. There are never any duplicates on either side. Whats the best collection class to hold these pairs so that it is easy to find an entry given either the left or right hand value of the pair?

std::map has a find function but it only finds on the 'key' field, I also need the equivalent for the 'value' field.

Re: Which collection class to use?

Joaquín M López Muñoz23-Nov-04 21:13

Joaquín M López Muñoz

23-Nov-04 21:13

Hi Paul,

I wrote a class called bimap which seems to me is exactly what you're looking for. Check it out here[^] (Caveat, it does not work for MSVC 7.1.)

The original idea of bimap, namely to maintain several access orders over the same set of elements, has been much expanded in a Boost library called Boost.MultiIndex[^]. A bidirectional map is just a particular case of what can be achieved with Boost.MultiIndex (though the syntax is not as terse as in bimap.) Boost.MultiIndex works for MSVC 7.1 and is generally much more powerful, so I'd recommend going for this.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
Want a Boost forum in Code Project? Vote here[^]!

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