ATL / WTL / STL Discussion Boards

Re: RE: Help

Jörgen Sigvardsson18-Aug-03 13:07

Jörgen Sigvardsson

18-Aug-03 13:07

Here and here

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About ATL/WTL

HansonDavid16-Aug-03 23:41

HansonDavid

16-Aug-03 23:41

Hello, sir:
I have a question about ATL and WTL. That is what is different from ATL and WTL. And how can i get WTL? Can you tell me some about WTL? Thanks a lot.

Re: About ATL/WTL

Michael Dunn17-Aug-03 7:20

Michael Dunn

17-Aug-03 7:20

Start here[^]

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Re: About ATL/WTL

HansonDavid18-Aug-03 1:01

HansonDavid

18-Aug-03 1:01

Thank in advance

How to convert from .DOC to .PDF, please help me ..........

Atif Bashir16-Aug-03 1:47

Atif Bashir

16-Aug-03 1:47

Hi Dears

I want to develop a MS Word Addin. The main functionality of this addin is:

--> I have to convert MS Word file (.doc) into (.pdf) file format.
What should I take as first step to implement this functionality.

Kindly guide/help me in the form of some code/link.

I'll be grateful to you.

Kind Regards

Atif

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Watch Your Actions for they will become your habits.
Watch Your Habits for they will become your beliefs.
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How can I send a reference of an object in a event?

emoscosocam13-Aug-03 13:49

emoscosocam

13-Aug-03 13:49

Hello!

What are the required steps in order to send a reference of an object through a event? Confused | :confused:

Thanks a lot in advance.

Re: How can I send a reference of an object in a event?

valikac14-Aug-03 6:42

valikac

14-Aug-03 6:42

What kind of object? If the object is supported by COM universal marshal, then you can pass it using VARIANT. Otherwise, one solution is custom marshaling.

Kuphryn

Re: How can I send a reference of an object in a event?

emoscosocam14-Aug-03 8:38

emoscosocam

14-Aug-03 8:38

Thanks a lot for your reply.

Here is what I intend to do: I have a Component with 2 Classes: ObjectSender and ObjectToBeSent. ObjectSender has one event: SendObject(IObjectToBeSent **pObject). My idea is to pass a reference of ObjectToBeSent to a Visual Basic client. However, when calling the Invoke method of the client, pVarResult returns an error; so the VB client does not execute its event handler.

In other words, I do not know how to send a reference of a COM object by using IDispatch::Invoke(). Can you please help me?

HRESULT Fire_SendObject()
{
...
CComVariant* pvars = new CComVariant[1];
CComObject<cobjecttobesent> *pObjectToBeSent;
IObjectToBeSent *pIObjectToBeSent;
CComObject<cobjecttobesent>::CreateInstance(&pObjectToBeSent);
pObjectToBeSent->QueryInterface(
IID_IObjectToBeSent, (void **)&pIObjectToBeSent);

....

for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++)
{
....
pvars[0] = pIObjectToBeSent;
pvars[0].vt = VT_UNKNOWN | VT_BYREF;
pvars[0].ppunkVal = (IUnknown **)&pIObjectToBeSent;
...
hr=pDispatch->Invoke(...) // This does not work
...
}
}

Thanks again for your kind attention.

Re: How can I send a reference of an object in a event?

Jörgen Sigvardsson18-Aug-03 13:10

Jörgen Sigvardsson

18-Aug-03 13:10

What is the error code you mention? (The one you get from Invoke())

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Re: How can I send a reference of an object in a event?

Jörgen Sigvardsson18-Aug-03 13:09

Jörgen Sigvardsson

18-Aug-03 13:09

As long it's an interface pointer, the idl-generated marshalling should take care of it... right? Confused | :confused:

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Re: How can I send a reference of an object in a event?

valikac18-Aug-03 17:50

valikac

18-Aug-03 17:50

It depends on the type of data. Given that it is one of COM universally supported data types, then yes the universal marshal will take care of type conversion.

Kuphryn

I hate ActiveX

Mauricio Ritter12-Aug-03 4:19

Mauricio Ritter

12-Aug-03 4:19

Just developed an ActiveX component in ATL, to download on some internet clients (throght signed CAB file and stuff). Problem is: some users have windows xp installed, and are logged on as users. The default configuraton for users on XP is:

1) they can't install ANYTHING on Downloaded Program Files
2) they can't register the components because they don't have WRITE permission to the registry.

How can I download my components now ?

I'M DOOMMED ! Mad | :mad:

I think I should move to Java applets...

Mauricio Ritter - Brazil
Sonorking now: 100.13560 MRitter

English is not my native language so, if you find any spelling erros in my posts, please let me know.

Re: I hate ActiveX

Stephane Rodriguez.12-Aug-03 4:40

Stephane Rodriguez.

12-Aug-03 4:40

Windows Installer which is a windows service is the only executable that has enough credentials to install something on a machine without root priviledge. So I guess you have to make a .msi setup.

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Re: I hate ActiveX

Mauricio Ritter12-Aug-03 5:30

Mauricio Ritter

12-Aug-03 5:30

But an administrator needs to give permissions on my .MSI. I'm deploying the component throught the internet.

I'm still hating ActiveX... Poke tongue | ;-P

Mauricio Ritter - Brazil
Sonorking now: 100.13560 MRitter

English is not my native language so, if you find any spelling erros in my posts, please let me know.

Re: I hate ActiveX

Stephane Rodriguez.12-Aug-03 6:21

Stephane Rodriguez.

12-Aug-03 6:21

Although it may be true that at some point if the machine is completely locked, it is impossible to install anything on it, usually a .msi file does work fine since it directly talks with Windows Installer which is running as a service. And the program gets installed on behalf of the Windows service.

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Re: I hate ActiveX

Michael Dunn15-Aug-03 19:13

Michael Dunn

15-Aug-03 19:13

Unfortunately the IE AX installation mechanism only works with CABs.

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c++ template compile error c2975

i--11-Aug-03 22:52

i--

11-Aug-03 22:52

Hi,everybody.
While I compiling my project writen in c++ with template ,I get a compile error c2975(vc++6.0),some error message like :
Compiling...
ChildView.cpp
..\ChildView.cpp(194) : error C2975: 'CXXTaskWorker' : invalid template argument for 'pdiid', constant expression expected
..\sbmtaskworker.h(73) : see declaration of 'CXXTaskWorker'
..\ChildView.cpp(194) : error C2975: 'CXXTaskWorker' : invalid template argument for 'plibid', constant expression expected
..\xxtaskworker.h(73) : see declaration of 'CXXTaskWorker'
..\ChildView.cpp(194) : error C2079: 'worker' uses undefined class '?$CXXTaskWorker@$1piid$1plibid'
XXTaskWorker.cpp
Error executing cl.exe.
TEST.exe - 3 error(s), 0 warning(s)

My code goes like:
//class delare

template <const IID * pdiid = &GUID_NULL,const GUID* plibid = &GUID_NULL><br />
class CXXTaskWorker : public IDispEventImpl<1, CXXTaskWorker, pdiid, plibid, 1, 0><br />
{<br />
public:<br />
...<br />
}

//use

CComponentInfo*  info;<br />
	if(m_mapComponent.Lookup(_T("test"),(CComponentInfo *)info))<br />
	{<br />
		const IID * piid = &(info->EventId);<br />
		const GUID * plibid =&(info->TypeLib);<br />
		<br />
		CXXTaskWorker<piid, plibid> worker;	<br />
...	<br />
	}

Re: c++ template compile error c2975

geo_m12-Aug-03 1:24

geo_m

12-Aug-03 1:24

hmm, bad news for you - that would require dynamic template instantiation during the runtime. You have to realize, that the template types (piid and plibid in your cases) must be specified at compile time, that the compiler will be able to deduce the template.

e.g. the use in style
CXXTaskWorker< &IID_IUnknown, &LIBID_MyLib > worker;
is valid because compiler knows what types/constants have to use while building the template code.
while the 'same' case

<br />
const IID * piid = &(info->EventId);<br />
const GUID * plibid =&(info->TypeLib);<br />
<br />
CXXTaskWorker<piid, plibid> worker;

not being valid, because then the template parameters depends on some runtime value and this is not possible Frown | :-(

Re: c++ template compile error c2975

i--12-Aug-03 2:32

i--

12-Aug-03 2:32

Yes,that's what i am wrong.as an alternative,I can use an extern variable to handle this problem.

Re: c++ template compile error c2975

i--12-Aug-03 2:34

i--

12-Aug-03 2:34

thank you for your help.

STL - lower_bound() w/vector of pointers

pfoo11-Aug-03 8:31

pfoo

11-Aug-03 8:31

I'm just learning STL. I have a vector of pointers to objects of a class I created. I'm trying to use lower_bound() and upper_bound(), but I don't see any way to specify how to compare my objects...the pointers are being compared instead. Does anyone know how to do this?

Thanks-

Patti

nevermind

pfoo11-Aug-03 9:05

pfoo

11-Aug-03 9:05

I got it. There is a version of lower_bound() that takes the comparison function.

I'm not liking the STL too much, tho...

Re: nevermind

Jörgen Sigvardsson12-Aug-03 13:47

Jörgen Sigvardsson

12-Aug-03 13:47

pfoo wrote:
I'm not liking the STL too much, tho...

It grows on you. Patience. Smile | :)

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debug assertions : wierd or not??

Senkwe Chanda6-Aug-03 8:44

Senkwe Chanda

6-Aug-03 8:44

Hi guys, I really wasn't sure whether or not to post this here as it might be generic to C++. Anyway, I have a WTL project.

I have some generic set up code like so...

LRESULT CMainFrame::OnCreate(...)
{
//toolbars get created here etc
lfh = new LogFileHandler();
lfh->ReadLogFile();
}

Now in the header file I have declared LogFileHandler lfh.

I have nothing yet in this class except

LogFileHandler::LogFileHandler()
{
int i = 0; //i have a breakpoint here
}

whats strange is that I get a "debug assertion failed" prompt whenever I step through the code. It tells me "m_hImageList != 0" in atlctrs.h (line 1533)

I have no idea why this happens. The app runs fine though when you hit Ctrl+F5.

Is there something I didn't pick up?

Thanks guys.

Senkwe

What's the difference between a C++ programmer and God? God knows he's not a C++ programmer :
anon

just me being stupid

Senkwe Chanda6-Aug-03 13:46

Senkwe Chanda

6-Aug-03 13:46

Sorry folks, I was caught in a bit of a brain lapse there. Figured it out.

Thanks

Senkwe

What's the difference between a C++ programmer and God? God knows he's not a C++ programmer :
anon

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