SafeArrayCreateVector and FADF_HAVEVARTYPE - COM Discussion Boards

7-Feb-02 6:42

Hello everybody,
i have heard a lot about callbacks but i can't find any simple example (without MFC in it) on the internet to get started. i'm using MSVC++ 5.0 and the ATL wizard.
please help if know a place to find a tutorial or something.

THX

Re: callbacks

Mazdak7-Feb-02 21:52

Mazdak

7-Feb-02 21:52

I'm looking for the same thing but I dont'find it.There are some resource in codeproject but they are MFC resources Frown | :(

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Re: callbacks

13-Feb-02 6:59

try use com+ events instead

any help with
http://www.codeproject.com/script/comments/forums.asp?forumid=1647&select=114120&tid=114120#xx114120xx

Why the ATL server fails to display dialog box?

tm6-Feb-02 8:52

6-Feb-02 8:52

My client is written in Visual Basic and my server is an ATL DLL written in VIsual C++. Why the dialog does not get displayed?

Thank you in advance for your help.

Paradise is where I am.
Voltaire

Re: Why the ATL server fails to display dialog box?

Matt Philmon13-Feb-02 17:47

Matt Philmon

13-Feb-02 17:47

I think we're going to need a bit more information than that...

Exception (kernel32.dll): 0xC000008F: Float Inexact Result

Tim Rymer6-Feb-02 6:45

Tim Rymer

6-Feb-02 6:45

Exception (kernel32.dll): 0xC000008F: Float Inexact Result

Any clues to what this is?
I'm creating some threads & using MFC Wininet APIs, but this would happen before i switched to MFC Wininet APIs too!
The thing is, i'm not doing any division, multiplication, or declaring any floats!

Any help is "way" appreciated.. thanks!

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

Re: Exception (kernel32.dll): 0xC000008F: Float Inexact Result

8-Feb-02 15:11

The exception code is a standard code when using a VB6 component within a process. However, all those exceptions should be handled and not fall into MFC. Andy idea if a VB6 component is loaded into the process?

SafeArrayCreateVector and FADF_HAVEVARTYPE

Buly6-Feb-02 6:22

Buly

6-Feb-02 6:22

Hello,

I have the following problem:
I'm saving and reading certain types of SafeArrays. Until now I relied among other things to SafeArrayGetVarType. I tested things with SafeArrayCreateVector and everything worked fine. Now, few months later I begin to get safeArrays created with SafeArrayCreateVector that don't have FADF_HAVEVARTYPE set (Feature flag is 0x2000). I have some hints that something updated my OLEAUT32.dll but I don't know what. I tried to use both SafeArrayCreate and SafeArrayCreateVectorEx, and with them I get feature flag that has only FADF_HAVEVARTYPE set - as it used to be - with one discrepancy from MSDN documentation. MSDN says (SafeArrayCreateVectorEx): "The FADF_HAVEIID can be set for VT_DISPATCH or VT_UNKNOWN and FADF_HAVEVARTYPE can be set for all other types."

But when I try to add FADF_HAVEVARTYPE to vt parameter of SACreateVectorEx the array isn't created at all - if I leave vt as it was array is created and has the correct vartype set.

Does anybody know which version of OLEAUT32.dll changed behaviour of SACreateVector? And what can I do without requesting that all of my clients use SACreateVectorEx or SACreate instead of SACreateVector?

ActiveX (ATL) question?

jancsi6-Feb-02 5:37

jancsi

6-Feb-02 5:37

I created an ATL project and inserted into it a Composite Control Object.
It works fine , but need to read some info from the browser specified in the
OBJECT tag
<object>
...
...
<param name="MyValue" value="123" />

How I read the MyValue from my ATL Composite Control?

xxx

ActiveX (ATL) question?

jancsi6-Feb-02 5:35

jancsi

6-Feb-02 5:35

I created an ATL project and inserted into it a Composite Control Object.
It works fine , but need to read some info from the browser specified in the
OBJECT tag
<object>
...
...
<param name="MyValue" value="123"

<="" object="" />

How I read the MyValue from my ATL Composite Control?

xxx

About destruct function in COM

wabc5-Feb-02 23:49

wabc

5-Feb-02 23:49

in a COM object,the class implement some interface can have
a destruct function?
when the destruct fuction is executed?

Re: About destruct function in COM

pba_6-Feb-02 7:49

pba_

6-Feb-02 7:49

Yes it can. The destructor is called when you delete the object - if you use "new / delete" operators for dynamic allocated objects or when the object goes out of scope, for local objects.For example if you implement "Release" from IUnknown like this :

ULONG MyObject::Release()
{
if( -- m_dwCount == 0 )
{
delete this; //here
}

return m_dwCount;
}

the destructor will be called at "delete this".

Anyone ever use IHTMLBrowser at all?

Tim Rymer4-Feb-02 7:34

Tim Rymer

4-Feb-02 7:34

Has anyone ever used IHTMLBrowser (and everything underneath it like IHTMLDocument2 etc etc

I'm trying to strip out href's etc from a webpage... but i cant seem to get past the part of getting the elements out of an IHTMLElementCollection!!!

any help?

(i've found some stuff... but only to get the IHTMLElementCollection - so far anyways, i'm still looking)

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

Re: Anyone ever use IHTMLBrowser at all?

Not Active4-Feb-02 13:54

Not Active

4-Feb-02 13:54

This help?

<br />
CComPtr<IDispatch> pDisp;<br />
if( SUCCEEDED(m_pBody->get_all(&pDisp)) && pDisp)<br />
{<br />
   CComQIPtr<IHTMLElementCollection> pColl(pDisp);<br />
   if(pColl)<br />
   {<br />
    long lCount;<br />
    if( SUCCEEDED(pColl->get_length(&lCount)) && lCount > 0 )<br />
    {<br />
	pDisp.Release();<br />
	CComVariant varName, varIndex(lCount);<br />
	pColl->item(varName, varIndex, &pDisp);<br />
<br />
	CComQIPtr<IHTMLElement> pElement(pDisp);<br />
	if(pElement)<br />
	   pElement->insertAdjacentHTML(A2OLE("beforeEnd"), A2OLE(strElement));<br />
    }<br />
  }<br />
}<br />

Re: Anyone ever use IHTMLBrowser at all?

Tim Rymer5-Feb-02 5:04

Tim Rymer

5-Feb-02 5:04

Ok, here's the weird thing, I CANNOT EVER get anything back from IHTMLLinkElement or IHTMLAnchorElement when i need it to.

I get:
IHTMLDocument2, in which i call "get_links" to give me
IHTMLElementCollection, which in turn, gives me NOTHING.

I'm using http://www.yahoo.com cuz we know there's about a gajillion links right there, but if i try to pick up all the tags from get_body, i'll only get back like 15 (or 11 when i tried using the CComPtr's instead...)

If anyone knows of a tutorial, or anything like that, let me know! or any article on codeproject.com - i found something on codeguru.com, but it just wasnt what i needed.

i am STUCK.

~Timothy T. Rymer

http://www.digipen.edu
http://tim.xpertz.com
http://www.ttrx.com (index is UP!)

Re: Anyone ever use IHTMLBrowser at all?

Nemanja Trifunovic5-Feb-02 5:29

Nemanja Trifunovic

5-Feb-02 5:29

Tim Rymer wrote:
IHTMLDocument2, in which i call "get_links" to give me
IHTMLElementCollection, which in turn, gives me NOTHING.

Seems that get_links returns only named links. You should try get_all, and then distinguish between them with get_tag. I know an example in VB:

A VB example

I vote pro drink Beer | [beer]

P.S. I am using the Lite HTML Control in ATL!!!

Tim Rymer5-Feb-02 5:06

Tim Rymer

5-Feb-02 5:06

wurd

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

scrolling

Chagit3-Feb-02 21:03

Chagit

3-Feb-02 21:03

How can I scroll down the html page, by vc++ code? OMG | :OMG:

Thank you

Chagit

"First Chance exception in ole32.dll "

Maria Jothi1-Feb-02 19:58

Maria Jothi

1-Feb-02 19:58

Hello Everybody ,

I created an Application (ATL COM EXE ) in Windows CE Platform Builder.

On executing it , i faced with an exception
"First Chance exception in ole32.dll
0xC0000005 Access Violation "

I would like to know the reason for the failure and How to solve the Problem.

Thanks in Advance

Regards
Maria
MailTo :mariajothi@sdsindia.com

Maria Jothi (Software Engineer)
MAIL-ID:maria_jothi@hotmail.com

Re: "First Chance exception in ole32.dll "

pba_6-Feb-02 7:43

pba_

6-Feb-02 7:43

Check for memory violations : bad function parameters ( when you do marshalling - NULL BSTR's and so on), bad interface pointers ( the object is destroyed but you still use some of his intrefaces). Use the ATL's debugging support - define _ATL_DEBUG_INTERFACES , _ATL_DEBUG_REFCOUNT, etc.

Re: "First Chance exception in ole32.dll "

6-Feb-02 8:46

Hi,

in these cases I allways look into marshalling problems, or some wrong variant handling stuff, or wrong work with some BSTR types
Not very helpful, but this is the way I'm going when exception in ole32.dll occurs and in 95% I succeeded.

georgem

Lite HTML Control opens new Browser...

Tim Rymer1-Feb-02 9:23

Tim Rymer

1-Feb-02 9:23

i'm calling m_spBrowser.Navigate() in my Lite HTML Control, and it opens up the website in a real IE Browser! How do I view the page right there in the control????

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

ok fixed that, now how do i get it to scroll?

Tim Rymer1-Feb-02 9:37

Tim Rymer

1-Feb-02 9:37

i had the Lite HTML Control set to _SELF - which doesnt mean "itself" it means "new window"...

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

Trying to get IHTMLTxtRange obj...

Tim Rymer1-Feb-02 5:40

Tim Rymer

1-Feb-02 5:40

Hey, i'm making a Selection Object (IHTMLSelectionObject) and i'm trying to call .createRange(IDispatch**) but it says to just pass in a IHTMLTxtRange object but it's not picking up the derived IDispatch, i've never really messed with HTML objects in general, so any advise as to why it says that I cannot pass in an IHTMLTxtRange object... i dont know.. just kinda lost really.. (i'm trying to make something where i can cycle through certain keywords and bringing up a menu on what to do with these keywords) but i want to stick with C++ and i wont be able to edit HTML tags and such as most "examples" show... I dont know.. i'm just kinda out there today so speak slowly! haha

Thanks,

~Timothy T. Rymer

http://www.digipen.edu
http://tim.xpertz.com
http://www.ttrx.com (not up yet)

HAHAHAHAHA Nevermind... just kidding! i Know how to call queryinterface() HAHAAHAH

Tim Rymer1-Feb-02 6:42

Tim Rymer

1-Feb-02 6:42

it's cool...n/m

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

Last Visit: 31-Dec-99 18:00 Last Update: 27-Sep-24 5:35

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