COM Discussion Boards

Re: How can i call COM DLL in vc++ 2005?

prasad_som29-Dec-06 0:28

prasad_som

29-Dec-06 0:28

surezu wrote:
I followed correctly through ur sending article

No , you haven't.
You are mixing simple dll with COM dll.
In case of COM dll, there would interface(s) present. Which you need to use. This interface in your case is Igscript .
You haven't noticed how interface need to be used from C++ client. Look in to CMfcclientDlg::OnOk.
You need to use CoCreateInstance for this purpose.
Refer CMfcclientDlg::OnOk. from article and post back, if got any issue.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: How can i call COM DLL in vc++ 2005? [modified]

$uresh $hanmugam29-Dec-06 4:22

$uresh $hanmugam

29-Dec-06 4:22

Hi Prasad,

I got result and i knew some basic concepts about COM based DLL.
Thank you very much.

-- modified at 7:30 Tuesday 2nd January, 2007

Amateur

Shouvik Das27-Dec-06 20:33

Shouvik Das

27-Dec-06 20:33

hi there,

To be using COM in my final year proj. Can anybody point me out very good reference - Online/literature. it'd of immense help as i need to learn it as a crash course Blush | :O

.

plz help

Shouvik

Re: Amateur

prasad_som28-Dec-06 1:56

prasad_som

28-Dec-06 1:56

Refer COM[^] section on this site.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Amateur

Shouvik Das28-Dec-06 2:02

Shouvik Das

28-Dec-06 2:02

Thanks Prasad,

Till now all my posts are replied by u first Smile | :)

thanks a lot

Shouvik

Re: Amateur

prasad_som28-Dec-06 2:16

prasad_som

28-Dec-06 2:16

Most welcome ! Smile | :)

Hope , it helps you in some way.

Majority of CP'ians are on vacation, otherwise, you will get lots of replies.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Amateur

Shouvik Das28-Dec-06 2:31

Shouvik Das

28-Dec-06 2:31

I also need to get some hands on Text parsing like Natural Language processing. Can u help me out.
I know this is out of thread ques. Plz bear with me.

please if u can... Smile | :)

Shouvik

Re: Amateur

prasad_som28-Dec-06 2:48

prasad_som

28-Dec-06 2:48

shouvik.d wrote:
Natural Language processing

Frankly, I'vent seen much of it, too. Better you ask this to larger audience, may be somebody has good knowledge of it.
Try General discussions/ lounge on this site, for this question.

Prasad
Notifier using ATL | Operator new[],delete[][^]

TLBIMP.exe and COM

mgmail27-Dec-06 8:34

mgmail

27-Dec-06 8:34

I have a webapp which uses a COM dll by way of a wrapper.

the last time i made changes to this object i was able to recreate the wrapper and it worked successfully.

now i am again modifying the the code of the object (nothing special, just added an order clause to a sql statement) however this time when i generate the wrapper, the webapp fails with the follwing runtime error

Could not load type StmtGeneratorNET.StatementGeneratorClass from assembly StmtGeneratorNet

any ideas what the problem is here ?

Re: TLBIMP.exe and COM

mgmail27-Dec-06 9:39

mgmail

27-Dec-06 9:39

Here is some additional information

when running TlbImp.exe i get the following warning, the wrapper dll is generated as is VBA.dll

TlbImp warning: Type library importer has encountered an interface not derived from IUnknown: _HiddenInterface.

however the webapp still cannot access the type required.

How can i use MODI in Vc++?

$uresh $hanmugam26-Dec-06 19:27

$uresh $hanmugam

26-Dec-06 19:27

Hi All,

I was done OCR using MODI in c#.NET.But how can do that one in Vc++.
Now i am using VS.2005.
If you know any articles or have any sample code, let me know please!...

Thankx in Advance

Cannot expand "com+ applications" from MMC Snap-In

scorpvg26-Dec-06 2:47

scorpvg

26-Dec-06 2:47

hi all...

I'm facing a problem with the Microsoft Managemant Console Snap-In for Component Services. I am not able to expand the node named "COM+ Applications" under "My Computer". I am getting the Error as Follows:
--------------------------------------------------------------------
An error occured while processing the last operation.
Error code 80080005 - Server execution failed

The Event Log may contain additional troubleshooting information.
--------------------------------------------------------------------

When i tried to view the Application Event Log, it also gave an error,
--------------------------------------------------------------------
Unable to Complete the operation on "Application"
Access Denied.
--------------------------------------------------------------------

Please give your inputs regarding this error. I would be extremely thankful to you guys......

VIGITH

vss automation

mian ghous23-Dec-06 2:39

mian ghous

23-Dec-06 2:39

can u please help me out in automation visual source safe 6.0 in c# using com

please tell me how to checkin and check out a file from vss project

explore the world of imagination and be known as creative

Is there any way to replace the dll with out IIS restart

Rajkamal_dfine22-Dec-06 1:36

Rajkamal_dfine

22-Dec-06 1:36

Hi all

I have a web application which was developed in ASP + VB + Scripting Language
The problem is when replacing the existing dll with newly created one
the IIS needs a restart...Is there any other way to replace the dll with out IIS restart...

N.Rajakumar B.E.,
Application Developer,
www.newdreamz.tk

com surrogated

sudharsong21-Dec-06 19:21

sudharsong

21-Dec-06 19:21

hi,
im using an com application in server,so whenever i log into the server through the remote desktop connection im getting an error like "COM SURROGATED".any help will be highly appreciated.thanks in advance.

with regards,
susa

Question about MFC &COM Application ?

Sakthiu20-Dec-06 2:07

Sakthiu

20-Dec-06 2:07

Dear All,

I have a MFC application and also i am having a COM interface with that application. Both are running at the same address space.

Now that MFC application is up, when I call that COM interface from different program, everything goes correct. well.

After the COM fn execution is done, the MFC application goes out of memory (application stoped).

What is the reason for this?

I need to have MFC application to be in memory still even COM fn is done.

To do this, what should i do ? How can i do this ?

Kindly help me.

Thanks.

Re: Question about MFC &COM Application ?

Skond23-Dec-06 2:50

Skond

23-Dec-06 2:50

Perhaps an extra IYourInterface::Release() happens caused by returning the interface pointer to the client via GetIDispatch(FALSE). Must be GetIDispatch(TRUE) to increase internal reference count.

hallelujah

Call DLL in VB.Net

rajiv KumarMM18-Dec-06 19:48

rajiv KumarMM

18-Dec-06 19:48

Want to call a dll which is created in vb 6 in vb.net. How i can do that. I am using dllImport but when running the .net aplication there is one error that Entry Point not define. Please provide solution that will highly appreciated.

Re: Call DLL in VB.Net

Stephen Hewitt19-Dec-06 18:25

Stephen Hewitt

19-Dec-06 18:25

Is it a COM dll? You can check this with OLEView or look to see if it exports the normal COM functions. If so you need to generate a RCW[^] (Runtime Callable Wrapper) for the DLL. I'm not a dotNET programmer so I can't help you with the specifics.

Steve

create a process using WMI?

abhiramsss18-Dec-06 8:55

abhiramsss

18-Dec-06 8:55

hi all
how to create and terminate a process using WMI

Can i have c++ code for it

Thanks

abhi

Starting COM Client from script

Manfred Staiger218-Dec-06 2:37

Manfred Staiger2

18-Dec-06 2:37

Hello everybody,
I have a COM client application which connects to COM server on the same machine. Everything works fine. But when I start the client from an asp script, the call to CoCreateInstance fails for some reasons. I`m not very experienced in COM programming. Do I have to use CoCreateInstanceEx because the client runs in the context of the webserver when it is started from the script? Or whatelse could be the reason? Does anybody have an idea?

tree view problem?

sajid.salim.khan16-Dec-06 8:15

sajid.salim.khan

16-Dec-06 8:15

Hi All
whats the best way if a treeview node is associated with 3 values more easily i say that when click on the node 3 values are displayed in Listview for that node how to bind the values with that particular node

SAS Rose | [Rose]

Re: tree view problem?

User 21559718-Dec-06 1:07

User 215597

18-Dec-06 1:07

wrong forum. I think your question is not related to COM. Try VC++ forum to get correct and fast answer.

S o h a i l K a d i w a l a

To Err Is Human; to Debug, Divine

modified 21-Apr-21 21:01pm.

using BSTR

chrigi00115-Dec-06 3:15

chrigi001

15-Dec-06 3:15

Hi
First: I know there are many topics in codeproject about using BSTR but i cant help myself further after 2 days trying to solve this problem...

1) Situation
============
My task is to write a program in VC++ which makes a windows program communicate to a sensor (MTi). There is a fully functional command line program from the producer of the sensor. Now i want to change severel settings (using specific functions) of the sensor like sample frequency and so on. The main function makes a Motion Tracker Object (written in c) to realize the communication through a virtual COM Port.

2) Problem
==========
I want to change the sample frequency of the data exchange between the program and the sensor (default it is 100Hz which is to fast for my application):

<br />
int nSFreq=25; //Sample Frequency in Hz<br />
int nUSFreq=0; //Used sample Frequency<br />
//Set new sample Frequency where pMT is the created Motion Tracker Object<br />
pMT->MT_SetMotionTrackerSampleFrequency(nSFreq);<br />
//Show the Sample Frequency for checkup <br />
MT_GetMotionTrackerSampleFrequency(&nUSFreq);<br />
//Show it on command Line<br />
printf("Your sample Frequency %d", nUSFreq);<br />

--> the command line shows 25 as expected, but the sensor samples still with 100Hz. Now i read that i have to safe the settings on the sensor using the sensor ID which is a BSTR. The ID i can get from this function:

<br />
//get the device ID<br />
virtual HRESULT STDMETHODCALLTYPE MT_QueryMotionTrackerB(<br />
            /* [out] */ BSTR __RPC_FAR *bstrDeviceID) = 0;<br />
//safe the new settings trough this function<br />
virtual HRESULT STDMETHODCALLTYPE MT_SaveToMTS( <br />
            BSTR bstrDeviceID) = 0;<br />

--> now, what i have done in my program:

<br />
BSTR nDId;<br />
//get the Device ID<br />
pMT->MT_QueryMotionTrackerB(&nDId);<br />
//safe settings<br />
pMT->MT_SaveToMTS(nDId);<br />

-->The program compiles very nice but when i run the .exe i got this damn error message all the time:
"An exception 'System.NullRefereceException' has occured in MTi.cmd1.exe"
(-->The error is only caused when i use the BSTR function shown above)

I know the problem is this BSTR but i cant help myself. Maybe someone can tell me what i need to do.
1000Thx

chris

Re: using BSTR

lafleon15-Dec-06 8:51

lafleon

15-Dec-06 8:51

Hi,

Just use CComBSTR instead of BSTR and use CString to convert from BSTR to char* and visa versa.

Regards

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