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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

is my face red? that's what happens when you're self taught w/o books...d'oh it's good to laugh at yourself sometimes!

Tim Rymer1-Feb-02 6:43

Tim Rymer

1-Feb-02 6:43

haha yeah...

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

it's even funnier when you're talking to yourself with a trained group of professionals reading what you are saying!

Tim Rymer1-Feb-02 6:47

Tim Rymer

1-Feb-02 6:47

yep.

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

Re: Trying to get IHTMLTxtRange obj...

Amit Dey28-May-02 2:36

Amit Dey

28-May-02 2:36

Hi,
this is not meant to make you feel more embarrased and probably you already have solved this problem. ANyway, recently, I was doing something quite similar and just comparing notes with you - Smile | :)

//m_spDoc is the smart pointer to IHTMLDocument2 that
//represents the current webpage loaded in the browser. I
//too am trying to get the selection text and figure out
//the element position and element tagname.

IHTMLSelectionObject *sel;
CComQIPtr < IHTMLTxtRange, &IID_IHTMLTxtRange> tRange;

CComPtr < IHTMLElement> element;
hr = m_spDoc->get_selection(&sel);
if (FAILED(hr))
return;
CComBSTR type;
hr = sel->get_type(&type);
if (FAILED(hr))
return;

if (type == OLESTR("None"))
return;

CComPtr < IDispatch> ppDisp;
hr = sel->createRange(&ppDisp);
if (FAILED(hr))
return;

tRange = ppDisp;
CComBSTR bstr;
hr = tRange->get_text(&bstr);
if (FAILED(hr))
return;
if (bstr.Length() == 0)
return;
bstrText = bstr;

Wow!! do you study at digipen or teach there? Being an amateur game coder(yeah! I fiddle around with DX too!!) it's been a dream to get to learn game programming at digipen, but somehow couldn't afford it!! Smile | :)

sonork: 100:18407

pass VARIANT to COM via VBScript

David Dal Zot31-Jan-02 4:55

David Dal Zot

31-Jan-02 4:55

Hi,

I can pass VARIANT to this method :

STDMETHODIMP Cwr::callWRrtf(VARIANT vTempArray,BSTR* output)
{AFX_MANAGE_STATE(AfxGetStaticModuleState())
VARIANT *rgv1;
SafeArrayAccessData(vTempArray.parray,(void**)&rgv1);
...

with this VBasic client :

Dim v2(1) As Variant
v2(0) = "some string"
res = myDLL.callWRrtf(v2)

but i want to do this in VBScript. Is it possible ? How ? I tried but
it doesn't work ....

Thanks

David
Confused | :confused:

David D.

Re: pass VARIANT to COM via VBScript

Matt Philmon4-Feb-02 7:25

Matt Philmon

4-Feb-02 7:25

I'm guessing you wrote your COM DLL in ATL? Obviously you're COM DLL was written as an in process Single Threaded Apartment using an interface derived from IDispatch? These are some of the rules for dealing with script code, ie, on web pages.

There's many, many, many other unwritten rules. However, a few of them are:
1) If you are passing IN string data you MUST use BSTR as your type.
2) If you want string data OUT you MUST use VARIANT. Yeah, you'd figure that BSTR* would get you what you want but the unfortunate truth is while it may work occasionally, it will get you 9 times out of 10 and when you least expect it. Even using BSTR* as your [out,retval] won't always work. Instead make it just another parameter, [in] VARIANT* and return a succeed/fail as the return value so you know if the data was any good.

So, in this case it looks like you want to use VARIANT's in both parameters though I'm not sure but data is being passed in (or out) from your VARIANT object. On the other matter, VBScript is ALL variant data. If you simply ignore the type it should work fine.

COM/DCOM with Macros

Hugo Saporetti30-Jan-02 9:52

Hugo Saporetti

30-Jan-02 9:52

Hi,

I have some problems with my application and need some help on it. That is the problem: I have a macro running on a MSWord document, and this macro calls some components (DCOM) that i've made. Once Visual C++ were instaled on the machine (either if it was removed) no problem occurr. But else it causes a fatal error that closes the MSWord (Winword.exe). I think , it install some dll's that resolves this problem, but I don't know wich to install.
My components uses ATL Dialogs, where I think the problem is. I use Install Shield to install my application and if there's some way to do with this tool may be helpful.

YVS

Re: COM/DCOM with Macros

Ernest Laurentin30-Jan-02 11:09

Ernest Laurentin

30-Jan-02 11:09

Check to see if ATL.DLL was installed on these machines before you installed VC++.
If not, you need to register that DLL also when you install your application.
(This is a common problem with Windows 95)

- Greatest invention : "The Microchip!"

Re: COM/DCOM with Macros

Hugo Saporetti31-Jan-02 1:27

Hugo Saporetti

31-Jan-02 1:27

Thank you, but it does not work.

YVS

IAccessible->accLocation.

Chagit30-Jan-02 2:46

Chagit

30-Jan-02 2:46

When I use the function "accLocation" in an HTML page,
I get the points: top and left, that refer to the part of the page that I can see.
how can I get the points that refer to the beginning of the page?

For example:
I have a long html page (5000 points),
and I scrolled down.
We can see the points from 2500 to 3500.
I have an object that its top is 2700,
When I run the function "accLocation" I get the top 200.
How can I get the full measurement 2700? OMG | :OMG:

Thank you

Chagit

IDispatch::GetIDsOfNames and overloaded functions

Nemanja Trifunovic28-Jan-02 12:01

Nemanja Trifunovic

28-Jan-02 12:01

I need to use IDispatch::Invoke() to call a function which I know by name. Therefore, I can use GetIDsOfNames() to find the DISPID of the function.

But what if I have overloaded functions, that is several functions with the same name, but different arguments? How can I get the DISPID of the right one?

I vote pro drink Beer | [beer]

Re: IDispatch::GetIDsOfNames and overloaded functions

Not Active28-Jan-02 12:08

Not Active

28-Jan-02 12:08

You can't have methods with the same name.

Re: IDispatch::GetIDsOfNames and overloaded functions

Nemanja Trifunovic28-Jan-02 12:23

Nemanja Trifunovic

28-Jan-02 12:23

Yeah, I've just found out that. Thanks for your reply.

I vote pro drink Beer | [beer]

ActiveX control IUnknown pointer

Abdiel Jaramillo28-Jan-02 11:37

Abdiel Jaramillo

28-Jan-02 11:37

How can i obtain the IUnknown interface pointer(LPUNKNOWN) for an ActiveX Control ?

Abdiel Jaramillo
Arango Software International
Panama, Rep. of Panama.

Simple COM control question?

Rob Caldecott28-Jan-02 7:53

Rob Caldecott

28-Jan-02 7:53

I have a simple ATL COM control and I need to supply a method that fills a BYTE buffer (passed by the caller) with some data that the control has read from a file. As this data may contain zeroes, I cannot use BSTR. I thought this would be easy - declare something like the following IDL:

[id(11), helpstring("method GetImage")] HRESULT GetImage([out] unsigned char* pData, [out, retval] BOOL* pVal);

Then access the buffer directly in the COM control:

STDMETHODIMP CKView2::GetImage(unsigned char* pData, BOOL* pVal)
{
// Access the buffer
memcpy(pData, m_pSource, ...)
// Done
*pVal = TRUE;
return S_OK;
}

Of course, this doesn't work.

The question is - is there a simply way to do this? Or do I need to look at the ghastly SAFEARRAY? Strings are allocated with AllocSysString - is there an equivalent way to allocate a generic buffer allowing you to easily copy some non-string data?

Any comments would be appreciated!

Re: Simple COM control question?

Ernest Laurentin28-Jan-02 8:13

Ernest Laurentin

28-Jan-02 8:13

Yes you need to look at SAFEARRAY. It's not that bad to use a SafeArray.
I also found it's better to pass array as VARIANT.
Good luck and be patient!

- Greatest invention : "The Microchip!"

Re: Simple COM control question?

28-Jan-02 8:17

If you don't want to use an array, a quick and dirty way is the following:

[id(11), helpstring("method GetImage")] HRESULT GetImage(long pData, [out, retval] BOOL* pVal);

Here "pData" is the buffer address supplied by the client (casted to long). So the implementation will be like:

STDMETHODIMP CKView2::GetImage(long pData, BOOL* pVal)
{
// Access the buffer
memcpy((void*) pData, m_pSource, ...)
// Done
*pVal = TRUE;
return S_OK;
}

P.S. 1. This works only for "in-proc" controls.

P.S. 2. Since you data may contains NULL characters, you might want to add another parameter for buffer size or return data length.

Re: Simple COM control question?

Not Active28-Jan-02 8:32

Not Active

28-Jan-02 8:32

<br />
ThisBytes([in] int nCount, [out] BYTE** ppBytes)<br />
{<br />
  BYTE* pBytes = reinterpret_cast<BYTE*>(CoTaskMemAlloc(nCount * sizeof(BYTE));<br />
<br />
 // Fill in pBytes<br />
<br />
 *ppBytes = pBytes;<br />
<br />
 return S_OK;<br />
}<br />

Don't forget to call CoTaskMemFree

COM app

28-Jan-02 5:46

Hi,

I developed a COM app under VC++, which is called by a macro from WinWord.
The application have 6 Dll's, some works perfectly, and some which must show a dialog derived from CDialogImpl doesn't.
In machines that has or had the VC++ installed, my application works perfectly, no problems. But in machines that never had the VC++ installed, the problem occurs.
Everything is registered, installed as should be installed. So the problem is not with the application, and I think it could be with some Dll's from the system.

So if someone has a solution, please send me.

Thanks.

Otávio
otavio.romao@inatel.br

Re: COM app

Not Active28-Jan-02 8:33

Not Active

28-Jan-02 8:33

Make sure everything is built in release mode not debug.

Last Visit: 31-Dec-99 18:00 Last Update: 6-Jun-24 17:46

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