Re: Making the mouse pointer disappear - C / C++ / MFC Discussion Boards

Re: CSockets Windows 2003

jan larsen3-Sep-04 1:46

3-Sep-04 1:46

I can't give you any specific help, just remember that Win 2003 runs very tight restrictions on almost every IO operations.
But you have to provide more info, it could be that you haven't got access to the MFC library, or that you are denied access to the library by Win 2003.

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: CSockets Windows 2003

shiraztk3-Sep-04 2:11

shiraztk

3-Sep-04 2:11

Hi
Thank you very much.
I will return after trying out your suggestions.

Regards

The Best Relligion is Science.
Once you understand it, you will know God.

Re: CSockets Windows 2003

shiraztk3-Sep-04 20:06

shiraztk

3-Sep-04 20:06

Hi
class CUdpSocket : public CSocket

CUdpSocket m_CUdpSocket;
///////////////////////

m_CUdpSocket.Create(iport,SOCK_DGRAM,"")
this is what fails in windows 2003. Any Idea would be appreciable.

Regards

The Best Relligion is Science.
Once you understand it, you will know God.

CFtpConnection::GetFile(…) returns Access is denied

anderslundsgard2-Sep-04 23:26

anderslundsgard

2-Sep-04 23:26

What could possible be wrong when CFtpConnection::GetFile(…) returns 5 (Access is denied). I know the file exists and I’ve got the right URL.

Thanks for tips

_____________________________

...and justice for all

APe

In-program Custom Panel through Inheritance

Karel Appel2-Sep-04 23:15

Karel Appel

2-Sep-04 23:15

Hello Everyone,

A question related Form design with C++ in Visual Studio .NET 2003.

Scenario
I've one Form, let's call it MyForm, with various controls on it. There's a Panel on this Form on which the user can draw and edit a polygon. Now, the mouse event methods were becoming quite large, so it seemed like a nice idea to write a custom class (MyPanel) which is a child of "System::Windows::Forms::Panel". In this class I for example redefine the "OnMouseMove", "OnMouseDown" and "OnMouseUp".
Next, I changed one line in the "InitializeComponent" method of MyForm; that is, I changed:

"this->panel1 = new System::Windows::Forms::Panel();"
into
"this->panel1 = new Guillotine::CCanvas(this);"

Results & Problem
Now, the above works fine when I compile and run the application. However, I'm in real trouble when I start using the Form Designer. The Form Designer removes all the code related to the Panel, thus clearly does not accept any adaptations to the "InitializeComponent" method of MyForm.
NOTE: The MyPanel class can not be written as a stand-alone control, and then imported through a dll, since it "talks" to various other controls on MyForm!

Question
I realize that InitializeComponent is *not* to be adapted (according to the text preceding this method). However, the above change seems very natural, and the adaptation of the "InitializeComponent" is marginal. My question is whether I can let the Form Designer know that everything is ok with MyPanel (my self defined Panel class), and that the Designer can accept this child of Panel as a Panel?

Looking forward to possible approaches to tackle this problem (or on explanations why I should definitely *not* do this Wink | ;)

how to disable device(better "sound device" ) under 98/me

max_xiayi2-Sep-04 22:47

max_xiayi

2-Sep-04 22:47

if you have solution, can you send me the source code to xiayi@ustc.edu?

please contact:
max_xiayi@hotmail.com

Making the mouse pointer disappear

Matthias19782-Sep-04 22:44

Matthias1978

2-Sep-04 22:44

Hello!

I'm currently building an application which uses a kind of "magnifying lens" to zoom into a displayed DIB. I use the mouse to move this "magnifying lens", but I think the mouse pointer is quite annoying while zooming in, so I want to make it disappear.
Does anyone know a nice and convenient way to switch the mouse pointer on and off?

Thanks a lot in advance!

Matthias

Re: Making the mouse pointer disappear

Anonymous2-Sep-04 22:57

Anonymous

2-Sep-04 22:57

Yes I know the code for it.

Re: Making the mouse pointer disappear

Antony M Kancidrowski2-Sep-04 22:57

Antony M Kancidrowski

2-Sep-04 22:57

Use LoadCursor() if you pass NULL the mouse pointer will be turned off.

To turn it back on again (standard arrow) use IDC_ARROW.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Re: Making the mouse pointer disappear

Graham Bradshaw2-Sep-04 23:47

Graham Bradshaw

2-Sep-04 23:47

You could use the ShowCursor function.

Error message and then application crashing.Help

Raghunandan S2-Sep-04 21:34

Raghunandan S

2-Sep-04 21:34

Hi All,
I have a client application which is sometimes displaying the message "An unknown error occurred while accessing an unnamed file" before crashing.This message is being displayed very randomly and i could simulate this only once.
The scenario was like this:
1) The client and server are running in seaparate machines connected over a network.
2)Send some request commands to server and before the response is obtained,disable the network on client's side.

The message "An unknown error occurred while accessing an unnamed file" was displayed and on clicking ok the application crashed.There is no log of this crash also.Can some one tell me whether this related to CArchive and what should i do to avoid this or what protection code should i add to avoid crash.

The function CSocket::OnClose() is getting called immediately when the network is being diabled.But this function is not getting called when the above message is displayed and in such situation the application is crashing.

Thanks in advance

Regards
Raghu

Re: Error message and then application crashing.Help

Antony M Kancidrowski2-Sep-04 23:01

Antony M Kancidrowski

2-Sep-04 23:01

Have you tried putting try and catch around your socket code?

In doing so you may be able to get a better idea of the exception.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

MFC Application in MFC DLL possible?

RonnyS2-Sep-04 21:33

RonnyS

2-Sep-04 21:33

Hi Folks!

I have a question, i have a quite normal MFC Applikation and i want to have the Functions of the Project in a DLL. Is it possible to konvert the Project into a DLL? When yes, how can i make this?

I hope somebody can help me!
Thanks,
Grettings Ronny

Re: MFC Application in MFC DLL possible?

Antony M Kancidrowski3-Sep-04 2:34

Antony M Kancidrowski

3-Sep-04 2:34

It is probably better to generate a DLL and then add the function into the newly generated code.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

dll problem:how to gain the fucntion's parameters in dll file

williamchou2-Sep-04 20:51

williamchou

2-Sep-04 20:51

hi,
now i should get the param from the dll function,i just could gain the symbol(function name) in dll(and i can't make sure which language have been used to create the dll),but how to gain the fucntion's parameters in dll file?
thanks!

STL quickie

alex.barylski2-Sep-04 19:47

alex.barylski

2-Sep-04 19:47

I have a list<basic_string> which only contains 2 items.

I have found tons of examples of iterating the list, but none for only dealing with 2 items.

How do I get the string values from the first and second element?

Thanks Smile | :)

How do I print my voice mail?

Re: STL quickie

Johann Gerell2-Sep-04 20:37

Johann Gerell

2-Sep-04 20:37

Hockey wrote:
I have found tons of examples of iterating the list, but none for only dealing with 2 items.

Well, you could of course iterate the list also with 2 items in it... Poke tongue | ;-P

Hockey wrote:
How do I get the string values from the first and second element?

std::list<std::wstring> strings;
strings.push_back(L"string 1");
strings.push_back(L"string 2");
cout << strings.at(0) << L" and " << strings.at(1);

Might output string 1 and string2, if you are lucky.

--
The Blog: Bits and Pieces

Re: STL quickie

alex.barylski2-Sep-04 20:50

alex.barylski

2-Sep-04 20:50

Cool i'll try it Smile | :)

Thanks

How do I print my voice mail?

Re: STL quickie

alex.barylski2-Sep-04 20:53

alex.barylski

2-Sep-04 20:53

Didn't work for what i'm trying to do Frown | :(

typedef std::list<std::basic_string<TCHAR> > string_list;

string_list m_lsFiles; // List of selected file(s)

Later on somewheres deep within my code I call:

MessageBox(0, m_lsFiles.at(0), m_lsFiles.at(1), MB_OK);

How do I print my voice mail?

Re: STL quickie

PJ Arends2-Sep-04 21:02

PJ Arends

2-Sep-04 21:02

try:

MessageBox(0, m_lsFiles.front(), m_lsFiles.back(), MB_OK);

A list is not a random access container, so you can not retrive elements with an index number.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: STL quickie

Johann Gerell2-Sep-04 21:13

Johann Gerell

2-Sep-04 21:13

Hah! What did I think of! I've been using to std::vector too much lately. D'Oh! | :doh:

--
The Blog: Bits and Pieces

Re: STL quickie

alex.barylski2-Sep-04 21:14

alex.barylski

2-Sep-04 21:14

I think I did try that...but i'll try again to be sure Smile | :)

PJ Arends wrote:
A list is not a random access container, so you can not retrive elements with an index number.

I'm a total newbie to STL, but I just realized that Smile | :)

Thanks again

How do I print my voice mail?

Re: STL quickie

alex.barylski2-Sep-04 21:19

alex.barylski

2-Sep-04 21:19

Tried it and I get this error???

'MessageBoxA' : cannot convert parameter 2 from 'class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >' to 'const char *'

How do I print my voice mail?

Re: STL quickie

PJ Arends2-Sep-04 21:30

PJ Arends

2-Sep-04 21:30

Combine what I said about using front() and back() with what Johan said below about using c_str() to get a char* from a string.

MessageBox(0, m_lsFiles.front().c_str(), m_lsFiles.back().c_str(), MB_OK);

Do not give up on STL. It is quite cool once you get use to it.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: STL quickie

alex.barylski2-Sep-04 21:43

alex.barylski

2-Sep-04 21:43

BINGO!!! It worked Smile | :)

Thank you kindly sir Smile | :)

PJ Arends wrote:
Do not give up on STL. It is quite cool once you get use to it.

it seems really cool, just frustrating when working on a due project....when I just want to get done what needs to be done Smile | :)

Thanks again!!!

How do I print my voice mail?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.