C / C++ / MFC Discussion Boards

Cool_Dev29-Nov-10 1:44

29-Nov-10 1:44

DirectShow is one option. You may use Sample Grabberfilter to build FilterGraph and grab first frame.

http://msdn.microsoft.com/en-us/library/dd407288(VS.85).aspx

Otherwise, using VMR filter, IVMRWindowlessControl9::GetCurrentImage Method will also do it.

Scale the frame to thumbnail of desired size, GDI+ is the simple option for this.

RemoveDirectory behaving differently in Xp and 7

ShadowUz28-Nov-10 17:47

ShadowUz

28-Nov-10 17:47

Hello guys.

I want to remove directory using RemoveDirectory("directory path"). I delete the directory using recursion.

The problem is, it's working fine in Win 7, but, in winXP it's not deleting the top-most directory:
In Win 7: RemoveDirectory("c:\MyFolder\Folder")--> it's deleting "Folder" including everything inside it.
In Win XP: RemoveDirectory("c:\MyFolder\Folder")--> "Folder" is not deleted, but all files and folders inside it are deleted.

The program is made in VS 2008 MFC, OS is Win 7.

Thanks!

Re: RemoveDirectory behaving differently in Xp and 7

Luc 64801128-Nov-10 17:54

Luc 648011

28-Nov-10 17:54

Did you watch the return value of RemoveDirectory? Did you call GetLastError on zero? Might your top-level directory have a different protection?

Smile | :)

Method of flagging a dialog control in error

Still learning how to code27-Nov-10 9:54

Still learning how to code

27-Nov-10 9:54

Hi, I want to check that all fields of a dialog are completed correctly by the user and to flag any controls that need attention. The only way that I can see of doing this is to create a transparent read-only edit box next to the dialog control in error. Then if the control needs attention, I can write an asterisk character to the associated edit box. Although this works, it would be more noticeable if the asterisk had a foreground colour other than black (e.g. red). I can't see any way of doing this, or is there a better method of achieving a similar result ? Any suggestions/advice welcomed !

Doug

Re: Method of flagging a dialog control in error

Luc Pattyn27-Nov-10 10:08

Luc Pattyn

27-Nov-10 10:08

you could display anything you like, e.g. a little red icon, and give it a tooltip showing some explanation when hovered.
Have a look here[^] to see what the .NET Framework provides.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: Method of flagging a dialog control in error

Still learning how to code27-Nov-10 11:09

Still learning how to code

27-Nov-10 11:09

Hi Luc, I don't have any experience with .NET or C#. I am using MFC and am wondering if there is anything I can use without involving a steep learning curve. Thanks in advance for your advice. Smile | :)

Doug

Re: Method of flagging a dialog control in error

Luc Pattyn27-Nov-10 12:17

Luc Pattyn

27-Nov-10 12:17

I'm not saying you need .NET or C#, just suggesting you could show something on your form, like a small icon, and give it a tooltip-like behavior. I'm sure that can be done easily in MFC; I'm not sure I ever knew how though, as I don't use pre-.NET technologies.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: Method of flagging a dialog control in error

Still learning how to code27-Nov-10 21:18

Still learning how to code

27-Nov-10 21:18

No problem, Luc ! I really must devote some time in the future to looking at .NET - it clearly does offer a lot. But at the moment, I still haven't REALLY mastered the basics ! Thanks for your help, nevertheless.

Doug

Re: Method of flagging a dialog control in error

Chuck O'Toole27-Nov-10 13:38

Chuck O'Toole

27-Nov-10 13:38

There's an excellent control XBalloonMsg that can give you a balloon on the field in error. I use it all the time and it's easy to invoke.

Find the article here[^]

A simple one liner creates a balloon error message.

CXBalloonMsg::Show("Failed", "Create Failed, Web Site may be Offline, Try again Later", GetDlgItem(IDC_CreateNewBeta)->GetSafeHwnd(), GetSafeHwnd());
<pre>

Re: Method of flagging a dialog control in error

Still learning how to code27-Nov-10 21:19

Still learning how to code

27-Nov-10 21:19

Hi Chuck,
Fantastic ! I've just had a quick look, and I think that it is JUST what I'm looking for ! Thank you very much for your help !

Doug

Re: Method of flagging a dialog control in error

Still learning how to code28-Nov-10 5:18

Still learning how to code

28-Nov-10 5:18

Hi again Chuck,
I have downloaded the demo project and tried to compile it.
However, I am getting the following errors:-
Compiling...
XBalloonMsg.cpp
d:\programming projects\xballoonmsg\src\xballoonmsg.h(48) : error C2065: 'TTI_INFO' : undeclared identifier
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(433) : error C2065: 'TTS_CLOSE' : undeclared identifier
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(433) : error C2065: 'TTS_NOFADE' : undeclared identifier
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(433) : error C2065: 'TTS_NOANIMATE' : undeclared identifier
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(436) : error C2065: 'TTS_BALLOON' : undeclared identifier
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(480) : error C2065: 'TTM_SETTITLE' : undeclared identifier
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(508) : error C2664: 'SetTimer' : cannot convert parameter 4 from 'void (__stdcall *)(struct HWND__ *,unsigned int,unsigned long,unsigned long)' to 'void (__stdcall *)(struct HWND__ *,unsigned i
nt,unsigned int,unsigned long)'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(524) : error C2065: 'WM_MENUCOMMAND' : undeclared identifier
d:\programming projects\xballoonmsg\src\xballoonmsg.cpp(524) : error C2051: case expression not constant
Error executing cl.exe.

A Goggle search points me to MSDN, and I find that defines such as TTS_CLOSE are (supposedly) contained within CommCtrl.h - #including this within the relevant .cpp doesn't resolve the errors. Having found CommCtrl.h there is no mention of TTS_anything.
What header file is required and where can I get it ?

Thanks for your help

Doug

Re: Method of flagging a dialog control in error

Luc Pattyn28-Nov-10 5:55

Luc Pattyn

28-Nov-10 5:55

Hi,

when you encounter problems, or just have a question, relating to a CodeProject article, the recommended approach is to ask in the forum at the bottom of the article; that way the author himself is getting an e-mail notification and may answer your question (unless he is no longer active in CP at all).

It also is wise to read through said forum anyway, as it contains comments and questions from others on the subject. Chances are your problem is already dealt with here[^].

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: Method of flagging a dialog control in error

Randor 28-Nov-10 6:09

Randor

28-Nov-10 6:09

Still learning how to code wrote:
What header file is required and where can I get it ?

It would really help if you stated what compiler you are using. I suspect that you need to install the Platform SDK or Windows SDK. You should also check the value of your _WIN32_WINNT and _WIN32_IE preprocessor definitions.

Best Wishes,
-David Delaune

Re: Method of flagging a dialog control in error

Still learning how to code28-Nov-10 9:31

Still learning how to code

28-Nov-10 9:31

Hi David,
I am running VC++ Ver 6.0
Having followed Luc's advice (see above), I visited the forum postings associated with the article. Within that there was a posting concerning compile errors similar to mine, and the author stated that it was simply a matter of changing the order of header and library directories to make PSDK at the top. Looking in Tools/Options/Directories, I could not see PSDK listed and therefore believe that this is my problem. So I downloaded Microsoft Platform SDK (R2) which seemed to be supported in my OS, WinXP. Only after the download and install, I see early within the documentation:-

Warning You cannot use the libraries from the current Platform SDK with Visual C/C++ 6.0 because the libraries were compiled using the new /GS switch to enable buffer overrun detection code. Using libraries compiled with this switch with Visual C/C++ 6.0 results in link errors. Specifically, the linker reports that it cannot find __security_cookie or __security_check_cookie.

I guess that the webpage must have specified this somewhere but I must have missed it.
Any idea how I get to the right version ?
Thanks for your help !

Doug

Edit: XP SP3 by the way !!

Re: Method of flagging a dialog control in error [modified]

Randor 28-Nov-10 10:42

Randor

28-Nov-10 10:42

Still learning how to code wrote:
I am running VC++ Ver 6.0

I suspected that would be the case. I am also still using VC6 for maintaining my older projects. The Febuary 2003 Platform SDK was the last version compatible with VC6. I would not recommend attempting to use a later version.

*edit*
It actually looks like Microsoft removed them from the public download center according to Sheng Jiang. Here is a Microsoft forum post on the subject:

http://social.msdn.microsoft.com/Forums/en/windowssdk/thread/83205c43-ef46-447d-ae54-92bbeb543c38[^]
Get it while you can...

Best Wishes,
-David Delaune

modified on Sunday, November 28, 2010 5:32 PM

Re: Method of flagging a dialog control in error

Still learning how to code28-Nov-10 11:18

Still learning how to code

28-Nov-10 11:18

Hi David, I saw somewhere on the web that the last PSDK compatible with VC6 was "the February 2003 version". This is surely the version prior to R2 (as the latter is a problem for VC6) isn't it ?
I think that it also said the Feb 2003 version wasn't available from MS on the web ! So where can I get it ?

Doug

Re: Method of flagging a dialog control in error [modified]

Randor 28-Nov-10 11:28

Randor

28-Nov-10 11:28

Whoops, sorry about that... looks like I linked to the wrong SDK. One sec, I'll edit the post and fix it.

*edit*
I could not find the febuary 2003 version at the public Microsoft download center. However I did find some direct links in the Microsoft forums. You should get it while its still available...

You should probably get the SP6 as well if you don't already have it installed.

Visual Studio 6 Service Pack 6[^]

Best Wishes,
-David Delaune

modified on Sunday, November 28, 2010 5:39 PM

Re: Method of flagging a dialog control in error

David Crow28-Nov-10 13:35

David Crow

28-Nov-10 13:35

Still learning how to code wrote:
Then if the control needs attention, I can write an asterisk character to the associated edit box. Although this works, it would be more noticeable if the asterisk had a foreground colour other than black (e.g. red).

See here.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

Re: Method of flagging a dialog control in error

Still learning how to code28-Nov-10 22:47

Still learning how to code

28-Nov-10 22:47

Hi David, Thanks very much for bringing this to my attention - looks very interesting and useful article. Why didn't I think of changing the background colour of the control rather than the foreground (retorical question !). It does raise my original point though - why CAN't you change the foreground colour (or have I missed it ?) ?

Doug

Re: Method of flagging a dialog control in error

David Crow29-Nov-10 9:14

David Crow

29-Nov-10 9:14

Still learning how to code wrote:
It does raise my original point though - why CAN't you change the foreground colour (or have I missed it ?) ?

Call SetTextColor() instead of SetBkColor().

Re: Method of flagging a dialog control in error

Still learning how to code29-Nov-10 9:47

Still learning how to code

29-Nov-10 9:47

Of course ! (Just going though the code now, and beginning to see how to about this)
Thanks for your help !

Doug

file copy with progress.

emmmatty127-Nov-10 8:30

emmmatty1

27-Nov-10 8:30

Hi,

I need to develop a program which will copy files to a user specified destination.I evaluated SHFileOperation function. but it does not provide an option to display custom progress bar. Is there any way other function which will allow to display custom progress bar during file copy.

Thanks,
John.

Re: file copy with progress.

Richard MacCutchan27-Nov-10 10:07

Richard MacCutchan

27-Nov-10 10:07

You could use basic read and write functions to copy the data and thus manage your progress bar within your own program. It does mean that you will have to do a little more work yourself but everything has a price.

Just say 'NO' to evaluated arguments for diadic functions! Ash

Re: file copy with progress.

Randor 27-Nov-10 11:44

Randor

27-Nov-10 11:44

The CopyFileEx Function[^] supports a progress callback.

Best Wishes,
-David Delaune

Re: file copy with progress.

Richard MacCutchan27-Nov-10 21:54

Richard MacCutchan

27-Nov-10 21:54

I had a nagging feeling I had missed something obvious; thanks for the reminder.

Just say 'NO' to evaluated arguments for diadic functions! Ash

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