Re: how to call coclass under TypeLib in vc++ - C / C++ / MFC Discussion Boards

Re: dll problem

Hamid_RT28-Dec-06 5:57

Hamid_RT

28-Dec-06 5:57

Do you want to use of functions on the dll in your program ?

WhiteSky

lock a folder?

Peter Weyzen27-Dec-06 20:40

Peter Weyzen

27-Dec-06 20:40

Is it possible to lock a folder? to prevent it from being deleted or renamed?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc.</A>

Re: lock a folder?

«_Superman_»27-Dec-06 21:26

«_Superman_»

27-Dec-06 21:26

Don't know of any way other than writing a file system filter driver.

« Superman »

Re: lock a folder?

Peter Weyzen27-Dec-06 21:38

Peter Weyzen

27-Dec-06 21:38

Well I figured it out:

You can create a file handle on the folder -- and set the sharing for read and write, but not delete.

m_FolderHandle = CreateFile(m_FolderName, FILE_LIST_DIRECTORY, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL );

closing the handle will unlock the folder.

I guess I didn't specify -- that I needed to only maintain the lock while my application is running...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc.</A>

how to call coclass under TypeLib in vc++

praveen kumar agarwal27-Dec-06 20:02

praveen kumar agarwal

27-Dec-06 20:02

Sir,
I have a list coClass under a typelib for a component. I would like to call methods & properties of a coClass, how can i do that.

I am expecting to get some help from you.
Thanks & Regards,
Praveen A.
praveena@navayuga.co.in

Re: how to call coclass under TypeLib in vc++

prasad_som27-Dec-06 20:31

prasad_som

27-Dec-06 20:31

praveen kumar agarwal wrote:
I would like to call methods & properties of a coClass, how can i do that.

I'm not clear about your requirement, Can you use IClassFactory::CreateInstance ?

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

Re: how to call coclass under TypeLib in vc++

praveen kumar agarwal28-Dec-06 1:15

praveen kumar agarwal

28-Dec-06 1:15

I have two coClass under a TypeLib. When I call coCreateInstance() method, it reciprocates with one of the default coClass in TypeLib. I can call methods & properties of default class but if i have to change to another coClass, how can i do that?.

example:
TypeLib has coClass1 and coClass2.
Using IDispatch interface, I can call the default coClass1 and its methods can be invoked.
IDispatch->Invoke()-->it executes default coClass1 methods & properties.

But, if I want to execute coClass2 methods & properties, how can i proceed?

I hope now you are clear about my requirement.
Thanks in advance.
Praveen A.

Re: how to call coclass under TypeLib in vc++

prasad_som28-Dec-06 1:32

prasad_som

28-Dec-06 1:32

praveen kumar agarwal wrote:
When I call coCreateInstance() method, it reciprocates with one of the default coClass in TypeLib

It gives you interface(coclass) you requested.

praveen kumar agarwal wrote:
But, if I want to execute coClass2 methods & properties, how can i proceed?

You need to use CoCreateInstance for different classes.
i.e. you need to call CoCreateInstance again for different interface, as it will have different CLSID.

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

How to insert SPLASH SCREEN into SDI application in MFC 6.0 project

yudhisthira27-Dec-06 20:00

yudhisthira

27-Dec-06 20:00

Hi all,
I have insert a Splash Screen in my SDI project in VC++ MFC.
Can any body tell me how can i do this?
please help.

Thanks and Regards

Yudhisthira Attry

Yudhisthira Attry

Re: How to insert SPLASH SCREEN into SDI application in MFC 6.0 project

prasad_som27-Dec-06 20:09

prasad_som

27-Dec-06 20:09

Here is list of articles[^].

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

How to Set Environment Variable using Mfc coding

Murugan k27-Dec-06 20:00

Murugan k

27-Dec-06 20:00

Help-I Don't know how to set environment path for Mycomputer System properties using MFC coding

Re: How to Set Environment Variable using Mfc coding

prasad_som27-Dec-06 20:14

prasad_som

27-Dec-06 20:14

Use _putenv[^].

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

Re: How to Set Environment Variable using Mfc coding

Murugan k28-Dec-06 18:20

Murugan k

28-Dec-06 18:20

Thanks for valueable information

Re: How to Set Environment Variable using Mfc coding

James R. Twine28-Dec-06 3:03

James R. Twine

28-Dec-06 3:03

   Do not waste your time on things like the C-RTL and Win32 functions (SetEnvironmentVariable(...)) to set environment variables - these only affect the process' environment space - other processes will not be affected, nor will you see the change when you bring up up the system properties.

   If you need to change these values such that the change remains after your application exists and/or are visible to other application and the system, you will need to modify the registry.

   Look up the HKCU\Environment and HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment registry keys for more information on how to do this.

   Peace!

-=- James

If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)

Re: How to Set Environment Variable using Mfc coding

Murugan k28-Dec-06 18:19

Murugan k

28-Dec-06 18:19

Thanks for your valuable information

Video Capture but from other player

InFuPr27-Dec-06 19:47

InFuPr

27-Dec-06 19:47

Hi!

I've got small (I hope) problem.

I'm using some video player. It has almost all that I need - I miss only one thing in it. It can't made screenshots (no ability to save one frame of played video to image file).

I created graph file with SampleGrabber for this video player, but the problem is how to use SampleGrabber when it is working with other application and create screenshot from Video that actually is played? Video finally goes to VMR9...

Or maybe there's other way to get screenshot from video played in VMR9 in other player... but how?

Greets Smile | :)

Re: Video Capture but from other player

Mark Salsbery28-Dec-06 5:48

Mark Salsbery

28-Dec-06 5:48

You'd need to be able to communicate with the other player somehow. How do you know the other
player is using DirectShow?

No retrieval. [modified]

Shouvik Das27-Dec-06 19:09

Shouvik Das

27-Dec-06 19:09

in an MFC Appl with DB without file support i've a two field (Database in Access) in Table Password -- [User] n [Pass].

The hint box in the m_pSet variable is showing the variable but on tryin to retrieve th data( i'v three records in the table) only "" is returned Confused | :confused:

.

what can be the error. I don't want to use m_pSet->m_strSort rather in the m_pSet->Open(...) i'm pumping the exact query.

what can b the error.

a snippet of the whole code is

    <code>Pass p1;
p1.DoModal();
CString str,query,str1;
int flag = 0;
str=p1.m_pass;

m_pSet->Close();
query = "Select * from Password where User='Admin'";
m_pSet->Open(CRecordset::dynaset, (LPCTSTR)query,CRecordset::none);//,(LPCTSTR)query,0);
m_pSet->MoveFirst();
MessageBox(m_pSet->m_Pass.GetBuffer(20));
while(!m_pSet->IsEOF())
{
    str1=m_pSet->m_Pass.GetBuffer(20);
    if(str1==str)
    {
        flag=1;
        break;
    }
    m_pSet->MoveNext();
}</code>

actually i've to retriev user n pass from a popup dlg n then verify it from the DB.
here to check i've used default user as Admin.

what can b the error.
plz help

-- modified at 1:37 Thursday 28th December, 2006

Shouvik

Re: No retrieval.

Venkata Rama Subbarao27-Dec-06 19:43

Venkata Rama Subbarao

27-Dec-06 19:43

Are you getting any value in the Message Box? I think the problem with GetBuffer menthod. you need to convert it to CString, because the return type of GetBuffer method is LPTSTR.

Subbarao.

No retrieval.

Shouvik Das27-Dec-06 20:11

Shouvik Das

27-Dec-06 20:11

Actually there was a field name mismatch yesterday. So on rectifyin it the appl is working. no need to cast it to LPCTSTR as an overloaded method already is avail.

thanks a lot.

Shouvik

Re: No retrieval.

prasad_som27-Dec-06 19:55

prasad_som

27-Dec-06 19:55

shouvik.d wrote:
m_pSet->m_Pass.GetBuffer(20

Try using CRecordset::GetFieldValue instead.

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

Solved

Shouvik Das27-Dec-06 19:55

Shouvik Das

27-Dec-06 19:55

Sorry to all,

but i solved the prob. Thanks

Shouvik

Re: Solved

prasad_som27-Dec-06 20:05

prasad_som

27-Dec-06 20:05

It will be helpful to other, if you post how you'd solved it.

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

Re: Solved [modified]

Shouvik Das27-Dec-06 20:31

Shouvik Das

27-Dec-06 20:31

yes i thought that and replied to Subbarao. It's just a mismatch in the fieldnames defined in C<<proj_Name>>View.cpp n the one existing in the DB. U pointed out the solution to me yesterday.

but strange thing was that the m_pSet->m_Pass was only thing not getting retrieved whereas all other values from table(s)(even other tables) were showing up.

What do u think could be the reason Confused | :confused:

-- modified at 2:38 Thursday 28th December, 2006

Shouvik

Re: Solved

prasad_som27-Dec-06 20:35

prasad_som

27-Dec-06 20:35

Again, there might be mismatch in field names. Have you tried using GetFieldValue.

But, you solved your prblem, isn't it?

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

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