C / C++ / MFC Discussion Boards

David Crow5-Oct-05 4:05

5-Oct-05 4:05

nripun wrote:
Is there a limit to the number of timers that i can have in an application?

Yes, timers are a limited global resource.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Number of timers

Bob Stanneveld5-Oct-05 6:24

Bob Stanneveld

5-Oct-05 6:24

No global resource is unlimited. To see how much you can create, you should write a program that just creates timers and reports the number of timers created when an error occurs...

Behind every great black man...
... is the police. - Conspiracy brother

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what do CreateEx exactly mean

vikas amin5-Oct-05 0:09

vikas amin

5-Oct-05 0:09

In the
CWnd class there is a function as "CWnd::CreateEx"
i would like to konw exactly what is the difference
beteween CWnd::Create.

thank u

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: what do CreateEx exactly mean

sunit55-Oct-05 0:48

sunit5

5-Oct-05 0:48

The only difference in the arguments.otherwise both of them create a Window

Re: what do CreateEx exactly mean

vamshin5-Oct-05 0:52

vamshin

5-Oct-05 0:52

vikas amin wrote:
i would like to konw exactly what is the difference
beteween CWnd::Create.

CreateEx Creates a Pop-up Window unlike Create Smile | :)

Re: what do CreateEx exactly mean

sunit55-Oct-05 2:10

sunit5

5-Oct-05 2:10

yes WinCreateEx::Create creates not only create child window(what CWnd::Create does)but also pop-up and overlapped window
attach it to CWnd object:->

-- modified at 8:12 Wednesday 5th October, 2005

Re: what do CreateEx exactly mean

vikas amin5-Oct-05 3:42

vikas amin

5-Oct-05 3:42

Thank you

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

How to hide mouse globally ?

Amarelia5-Oct-05 0:00

Amarelia

5-Oct-05 0:00

Hi
I have a dialog based MFC application in which I want to hide mouse globally.

I mean to say when I hide mouse it gets hidden but when i move my mouse over some other application or some other window, it gets displayed.

What I want to do is, once I hide my mouse, no matter where I move it, it should not be shown.....

Or is there any function through which I can disable my mouse ?

Regards

Amarelia Maehsh
Gujarat
India

Re: How to hide mouse globally ?

Sebastian Pipping5-Oct-05 23:59

Sebastian Pipping

5-Oct-05 23:59

i don't know of a funtion doing this but have you tried
using a global mousehook? are you familiar with window hooks?
i copuld imagine catching WM_SETCURSOR will do this but i'm not sure.

some links:
WM_SETCURSOR
SetWindowsHookEx()
MouseProc()

good luck!

___________________________________________
http://www.hartwork.org

stream io using VC++, normal or bug?

WernerPos4-Oct-05 23:49

WernerPos

4-Oct-05 23:49

Hi,

I haven't been using stream i/o very often, thought it was simple.
Wanted to read in an xml-file with 0x0A line delimiters.
used a for loop

(vc++ 6.0 on xp pro)

ifstream ifsIn("x1.xml");
string strData
for (string s; ifsIn>>s; strData+=s+'\n') {}
.

Was surprised to see, that operator>> uses blanks as input delimiters.
->Normal or bug?

Hence used
for (string s; ifsIn>>s; strData+=s+ifsIn.peek()) {}
i.e. blanks and newlines reside in stream and can be appended to be preserved in result.

Tried for fun to get '\r' + '\n' from ifsIn instead of just '\n' into my strData, because it's a windows format text file. Used ifstream ifsIn("x1.xml", ios::binary), but no success: Stream was empty then.
->Normal or bug?

I didn't find any way to set a property of the stream like "Use no delimiter, slurp in whole file".
->Is there?

Thanks for your assistance

And best regards
Werner

Re: stream io using VC++, normal or bug?

WernerPos5-Oct-05 0:05

WernerPos

5-Oct-05 0:05

Sorry, 2nd for-loop is buggy of course, actually it is,

string strData;<br />
ifstream ifsData("x1.xml");<br />
char cPeek[2];<br />
memset(cPeek, 0, sizeof(cPeek));<br />
for (string strTmp; ifsData>>strTmp; ) {<br />
    cPeek[0] = ifsData.peek();<br />
    strData+=strTmp+cPeek;<br />
}<br />

Regards
Werner

CSIDL for RECYCLER

Chintoo7234-Oct-05 22:40

Chintoo723

4-Oct-05 22:40

Does the RECYCLER folder always exist as C:\RECYCLER or there is a CSIDL for it that I use to query the recycle bin folder using SHGetFolderPath?

Thanks!
/f

Re: CSIDL for RECYCLER

Bartosz Bien4-Oct-05 23:20

Bartosz Bien

4-Oct-05 23:20

I haven't tried this, but how about CSIDL_BITBUCKET? MSDN says so.

Regards,
BB
http://spin.bartoszbien.com

Reading/Writing Excel files VC using Database support

kk.tvm4-Oct-05 22:24

kk.tvm

4-Oct-05 22:24

How to read/write excel files in VC using database support.

thanx in Advance

KK

Re: Reading/Writing Excel files VC using Database support

Jeffrey Walton5-Oct-05 9:35

Jeffrey Walton

5-Oct-05 9:35

http://chicago.sourceforge.net/devel/docs/excel/[^]

Toolbar positioning goes wrong on Win XP OS

Shailesh Halankar4-Oct-05 21:28

Shailesh Halankar

4-Oct-05 21:28

My Application's Toolbars positioning goes wrong on Win XP OS when i execute for the first time.But on win 2k etc they r fine.

If anyone has come across such a problem plz let me know on satyajit@phildigital.com

Question

micutzu4-Oct-05 21:22

micutzu

4-Oct-05 21:22

Hello everybody,

When a user is using the Task Manager to End a Process or a task there should be a message sent to the application – anyone knows which message is? Also there is any change to handle the message – e.g. a message loop.

Thank you.

Re: Question

Ghasrfakhri5-Oct-05 1:52

Ghasrfakhri

5-Oct-05 1:52

Hi I think:
when you end task e proccess from App list first a quit messege send o it & after a priod of time if you accept the windows Q about endtasking app Ended with any message,
but in proccess list proccess will be end without any message.

Iman Ghasrfakhri

Re: Question

micutzu5-Oct-05 2:13

micutzu

5-Oct-05 2:13

I see.

Thank you.

Regards,

Keboard character to localized string

Abyss4-Oct-05 21:02

Abyss

4-Oct-05 21:02

How can I translate the keyboard character to the current keyboard layout string? In the method CWnd::OnKeyDown I would like to translate the input character to the non English character - e.g. German. Maybe it is not possible to do it in the OnKeyDown method and I have use rather another method/mechanism, but I don't know which one. Unfotunately the given method always returns me the English character even I switched the keyboard layout to another language.

Thanks,
Abyss

Re: Keboard character to localized string

Ghasrfakhri5-Oct-05 1:56

Ghasrfakhri

5-Oct-05 1:56

Hi I think LoadKeyboardLayaut function is helpful for you , you most give yor languge code to this function it change keyboard language.

LoadKeyboardLayaut(_T("00000409"),KLF_ACTIVATE); // English <br />
LoadKeyboardLayaut(_T("00000429"),KLF_ACTIVATE); // Farsi

Iman Ghasrfakhri

Re: Keboard character to localized string

Abyss5-Oct-05 2:17

Abyss

5-Oct-05 2:17

Hi,

I didn't know this method, but based on MSDN it loads the keyboard layout. I have to play with this maybe it will automatically translates the character to the local character...
However user can switch to another languages. How can I catch this event? Or will Windows automatically handle this situation? It only requires to have the keyboard layout loaded to the application?

Thanks for your help,
Abyss

Question to the Gurus

Jagadeesh VN4-Oct-05 20:21

Jagadeesh VN

4-Oct-05 20:21

Hi,

I am developing an application with several components in it. The main application will have a GUI and there are several components like BHO, MS Office Addins, Clipboard trackers etc. I have a problem here.

These components should communicate with the main application by some means. It has to pass some events or some values to the main application. I will be creating both the components and the main application and I would like to know, the best method to connect the components to the main application.

I have pretty good exposure to COM and Windows programming.

Also Is it possible to create a Singleton Automation server ?

Thanks and Regards
Jugs

"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."

Re: Question to the Gurus

Roger Stoltz4-Oct-05 22:14

Roger Stoltz

4-Oct-05 22:14

Jagadeesh VN wrote:
communicate with the main application
Define "communicate" and the needs of the "communication process".
Are we talking about COM components? Will access methods do (get/set)?

Jagadeesh VN wrote:
connect the components to the main application
Define "connect".
Is this "connect" in the sense ::CoCreateInstance or is it referring to the "communication process" above?

Jagadeesh VN wrote:
Singleton Automation server
This feels like you want some kind of COM server that will act as a switchboard for the "communication process". Right or wrong?
The best way, IMO, is to register the server in the ROT and use monikers to be sure that there is only one switchboard alive.
But perhaps this is overkill. How about callback interfaces or connection points if we are talking about COM components?

--
Roger

Re: Question to the Gurus

Jagadeesh VN5-Oct-05 0:31

Jagadeesh VN

5-Oct-05 0:31

Hi Roger,

Thanks for the reply.

"Define "communicate" and the needs of the "communication process".
Are we talking about COM components? Will access methods do (get/set)?"

I have a BHO and some MS office addins, which will be continously monitoring some of the events like BeforeNavigate (BHO), OnOpenNewDocument(Addin), ONCloseDocument(Addin), etc.

I have a GUI application, where all these events should be reported consistently. I was thinking of implementing the GUI application as a Singleton Automation Server using DECLARE_CLASSFACTORY_SINGLETON macro. Then the monitoring components will create an instance of this automation server and since it is implemented using singleton pattern, the monitors will be able to connect and bind to the same instance of the GUI. Then they can use EventSinks or some other interface methods to communicate with the GUI.

Also Since I am using DECLARE_CLASSFACTORY_SINGLETON, I belive the Service Control Manager will check the Running Object Table and will return the currently active instance to all the clients. Can you please confirm this.

Once again Thanks for posting a reply.

Regards
Jugs

"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."

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