COM Discussion Boards

Member 310062427-Jan-08 22:17

27-Jan-08 22:17

Can anybody suggest me the material or site to refer to study ActiveX, ATL and COM control since i m new to this concept...

werwr

HBITMAP marshalling with out-of-process servers

Gary Wheeler24-Jan-08 3:04

Gary Wheeler

24-Jan-08 3:04

I'm passing an HBITMAP between an application and an out-of-process server.

If the HBITMAP is from a device compatible bitmap, the application displays it correctly.

If the HBITMAP is a DIB section, it displays as a black rectangle the same size as the bitmap.

Any ideas?

Software Zen: delete this;

COM exe startup issue

act_x23-Jan-08 6:41

act_x

23-Jan-08 6:41

I am developing a COM exe using ATL in VS 2005.

On my build machine( XP Pro) , I am able to successfully run the application (debug version )however when I copy the exe to another machine (XP Pro) the exe cannot run .

I get an error message

"The application has failed to start because the application configuration is incorrect . Reinstalling the application may fix this problem"
I have no clue about this error .

Help is appreciated !

Re: COM exe startup issue

Cedric Moonen23-Jan-08 20:57

Cedric Moonen

23-Jan-08 20:57

First thing, you cannot distribute debug version of your program.
Then, you need to install the run-time libraries and MFC libraries on the target machine. For that, you can execute vcredist_x86.exe on the target machine (you can download it from here[^]).

The link I provided is for VC2005 standard. If you installed the SP1 for VC2005, then look at the links at the bottom of the page, there is a similar download for SP1.

This will install the release versions of the libraries, so you need to distribute a release version of your program too.

Cédric Moonen
Software developer

Charting control [v1.2]

How do I create a managed com object with VS03?

Dan Neely23-Jan-08 5:08

Dan Neely

23-Jan-08 5:08

I've taken source code from several samples on the web, created a new class library project, and compiled it but I'm only getting a .dll file output, not the .tlb file regasm needs.

Otherwise [Microsoft is] toast in the long term no matter how much money they've got. They would be already if the Linux community didn't have it's head so firmly up it's own command line buffer that it looks like taking 15 years to find the desktop.
-- Matthew Faithfull

Re: How do I create a managed com object with VS03?

User 21559724-Jan-08 0:20

User 215597

24-Jan-08 0:20

REGASM[^] has an option to generate TLB file

Sohail

modified 21-Apr-21 21:01pm.

ActiveX Control

sv1422-Jan-08 21:41

sv14

22-Jan-08 21:41

I have an Activex control which exposes multiple interfaces for example,

ISample1 – CSample1 (Coclass)
ISample2 – CSample2 (Coclass)

I need to add new methods/properties (a new version). Since ISample1 and ISample2 cannot be modified, I’ll have two new interfaces,
ISample1Ext
ISample2Ext

These will be a replication of ISample1 and ISample2, but with new methods/properties added. The old interfaces will be marked deprecated and may be removed in future.

The question is, can I still use the classes CSample1 and CSample2 as CoClasses for ISample1Ext and ISample2Ext and modify them to implement the new methods/properties?

If this new version of the control is copied to the client m/c, how will it affect the applications that are using the old version of the control?

If I try to insert this control in an application, which version will be inserted? Also, how do you differentiate between the old version and the new version?

Thanks

Regarding User defined services..

tasumisra21-Jan-08 19:57

tasumisra

21-Jan-08 19:57

Dear all,
we can invoke our dlls from backgroud services.. like from "services.msc",

i have adoubt when we are writing such services what should be taken care so that it comes under "services.msc" not in "dcomcnfg"

and what is the difference in those two types ....

Thanks in advance

T@SU

Call of COM server crashes with Access Violation

MasterD21-Jan-08 5:49

MasterD

21-Jan-08 5:49

Hello,

I have a problem with calling my COM server. It connects and runs successfully with my development box, but crashes on another box.

On the other box, a CoCreateInstance call like:

CComPtr<imyclass> p;
hr = CoCreateInstance(CLSID_MyClass, NULL, CLSCTX_ALL, IID_IMyClass, reinterpret_cast<void**>(&p));

succeeds. Also calls to e.g. p->QueryInterface are ok. But if I call my own methods, it crashes with an access violation / null pointer. The problem is, that I cannot see, where the null pointer is. I don't know, which information I should provide, in order to help someone help me, so please ask anything.

Code is plain C++ with no .NET. Dev Box is a Win XP system, other box a Windows Server 2003 SP2.

To explain a bit more: The null pointer seems to be inside of the com call, since when I debug both client and server, the breakpoint inside of the server is not reached. The error message I get is "Unhandled exception at 0x00000000 in bin.exe: 0xC0000005: Access violation reading location 0x00000000." when I call p->Init(CComBstr, int) (The string is allocated correctly).

I'm pretty confused and don't even know where to start looking. Searching with something like "atl com access violation" or similar doesn't help.

Thanks in advance!

Re: Call of COM server crashes with Access Violation

MasterD22-Jan-08 2:54

MasterD

22-Jan-08 2:54

Solved:

The client was not linked with the server.LIB from the server. The .LIB was in the same directory, when the client was launched on my development box, but I've only used the EXEs on the 2003 OS. Linked the client with the LIB and everything workes fine.

How to read Excel file & save data in array...........

student49118-Jan-08 11:19

student491

18-Jan-08 11:19

hello,

I opened the excel file by using workbook.open() method...
Now i want to read the data from the excel file.. & save it into
array.

help out .. how to do this.
Then i want to pass that array through SetSourceData() method & want to draw cunztomized chart...

(I am using Excel 2007, C# 2005, COM)

Thx... Smile | :)

Class Not Registered

ritz123416-Jan-08 19:04

ritz1234

16-Jan-08 19:04

Hello Masters!

I am using VC.NET 2003.
In my project i want to use a xyz.dll which was written in VB 6.0.

In my VC.NET Project i use the code as shown below.

<br />
<br />
#import "MyTapi.dll"<br />
<br />
HRESULT hr;<br />
MyTapi::_Class1Ptr IPtr;<br />
hr=IPtr.CreateInstance(__uuidof(MyTapi::_Class1));<br />
<br />

The dll MyTapi.dll i've copied it in the current working folder as well in system32 and i've registered MyTapi.dll using regsvr32 on command prompt it registeres successfully.

But in the code above hr=Class Not Registered when I wan't to create intereface pointer of _Class1 Cry | :((

Thanks in Advance.

ritz123

how to open Existing Excel file ....

student49116-Jan-08 7:37

student491

16-Jan-08 7:37

Hello,

(for all of the followNg i m usNg C#2005, Excel 2007 & have to through COM)

i tried to open existNg Excel file by using follow method bt it gives error ... that this file doesnt exist or path is incorrect........

wb = ThisApplication.Workbooks.Open(paramWorkbookPath,
Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing);

& i also used this method tooo..
it also doesnt work .. Frown | :(

wb= ThisApplication.Workbooks.Open(paramWorkbookPath, 0, true, 5,
"", "", true, Excel.XlPlatform.xlWindows, "\t", false, false,
0, true,Type.Missing, Type.Missing);

//////////
second thing how to read data from excel file & use it for charts...
can any give example

i am using Excel 2007 , C# 2005 ... all z doing using COM...

waiting for reply..
thanks...........

What is the WebBrowser control?

keniagm16-Jan-08 5:59

keniagm

16-Jan-08 5:59

Hi everybody!!

I've done some research on the msdn about the WebBrowser control, but yet I can't find what it is. I can see the properties, events and so on, and by the way it's used i think it might be an ActiveX, but I'm not sure.
So can anybody tell me if it's actually an ActiveX, and if gets registered when Windows is installed? Also, is it used by IntenetExplorer in any of its features?
Please, if someone can help me out by explaining this to me or giving me a link to a page where all of these is explained, I will really appreciate it.

Thanks

Kenia

Re: What is the WebBrowser control?

gottimukkala31-Jan-08 0:03

gottimukkala

31-Jan-08 0:03

Hi
WebBrowser Control is not exactly ActiveX but you can develope ActiveX with WebBrowser Control.Here are some links for Web Browser control and there is an article which explains how to create an ActiveX with WebBrowser control.

http://www.c-sharpcorner.com/UploadFile/mgold/HyperlinkExec03012007191054PM/HyperlinkExec.aspx[^]
http://msdn2.microsoft.com/en-us/library/ms229657.aspx

Hope that helps!!!

Re: What is the WebBrowser control?

Catherine Sea15-Feb-08 15:28

Catherine Sea

15-Feb-08 15:28

Hi Kenia,

The WebBrowser control provides a managed wrapper for the WebBrowser ActiveX control.

This page may help you.
http://msdn2.microsoft.com/en-us/library/w290k23d.aspx

--
Catherine Sea
Dynamsoft Corporation

www.dynamsoft.com
the leading developer of version control and issue tracking software

Re: What is the WebBrowser control?

keniagm18-Feb-08 2:19

keniagm

18-Feb-08 2:19

Hi Catherine,

Thank you so much for your reply. I think the page will help me.
Thanks again,

Cheers,

Kenia

COMUNICATION BY RS232!

cute_noel14-Jan-08 0:31

cute_noel

14-Jan-08 0:31

Hello everybody!
I'm having a project:"Comunication between 2 PC by RS232(COM)".

I have not yet source code about this project!

I've just need a program in which I can comunicate between 2 PC by RS232 (send file or chat).So if everybody here have source code or a program about my project,please share it to me! Thanks very much!

Thanks for reading my message!

Regards,

Wrong forum

CPallini14-Jan-08 3:20

CPallini

14-Jan-08 3:20

COM stands for Component Object Model here.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

ApplyTemplateType()...

student49112-Jan-08 9:12

student491

12-Jan-08 9:12

Hello,

Can anyoNe give the example by using ApplyTemplateType()... method.
(means to draw a chart by chart template method)
(this shd b in C# n using COM)

thanks..............

How to call Dot net Web-Services in php/Java ?

alisolution11-Jan-08 21:13

alisolution

11-Jan-08 21:13

Hi everybody, recently i have problem of software development
my Question is that.

- How to call Dot net Web-Services in php/Java ?

Advance Thank

Re: How to call Dot net Web-Services in php/Java ?

Catherine Sea15-Feb-08 15:25

Catherine Sea

15-Feb-08 15:25

Hi,

There is an article about Accessing a .NET Web Service using Apache/SOAP and Java.
http://my.execpc.com/~gopalan/dotnet/webservices/webservice_java_client.html

Hope it helps.

----
Catherine Sea
Dynamsoft Corporation

www.dynamsoft.com
the leading developer of version control and issue tracking software

Convert CString to BSTR

mandanani10-Jan-08 20:05

mandanani

10-Jan-08 20:05

Dear All,

Unable to convert CString to BSTR! Am I a stupid?! Mad | :mad:

I have an interface method which needs to convert CString to BSTR and return BSTR to caller.
AllocSysString of CString is not copying the data to BSTR.

STDMETHODIMP CTP_Interface_ErrorCode_Wrp::GetAdditionalDataFlag(BSTR *AddDataFlag)<br />
{<br />
	AFX_MANAGE_STATE(AfxGetStaticModuleState())<br />
<br />
	// TODO: Add your implementation code here<br />
<br />
	CString temp = pTP_Interface_ErrorCode->GetAdditionalDataFlag();<br />
	*AddDataFlag = 	temp.AllocSysString();<br />
<br />
	return S_OK;<br />
}

Any one please help me.

Thanks very much, Nani

Cross Post?

CPallini10-Jan-08 22:10

CPallini

10-Jan-08 22:10

Cross Post => Cross Answer http://www.codeproject.com/script/Forums/View.aspx?fid=4486&msg=2386375[^]
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

How to draw Cutomized charts in Excel 2007.......

student4919-Jan-08 4:12

student491

9-Jan-08 4:12

Hello,

I want to know about charts....

How to draw Cutomized charts in Excel 2007.......(Using C# 2005 using COM)....

By using ApplycustomType() but how to use it in for Excel 2007...

Thanks..
Waiting for reply

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