Re: Hyperlink ed List Item in a List Control - C / C++ / MFC Discussion Boards

Re: How to user fopen function? [modified]

huutribk20011-Jun-06 22:04

huutribk2001

1-Jun-06 22:04

If I used OPEN_EXISTING and share mode 0, but I can not create a new file if the file have not existed,
My function is record a file avi,
if the file have not existed then create new one,
if the file existed and have not opened by orther app then over write this,
if the file existed and opened by orther app then give the user error is can not access and do nothing.

Any help again?

Thanks again!

Re: How to user fopen function? [modified]

kakan1-Jun-06 22:32

kakan

1-Jun-06 22:32

That's a different story!

I suggetst you to do like this:
Open the file for reading, exclusive access. Then you will know two things:
A.
The file exists.
B.
The file is not opened by some other application.
Close the file, if it's open.

If you get an error, then examine the error. If you get ERROR_ACCESS_VIOLATION (?) then the file exists but is opened by some other application. Show user error and terminate the function.

If you get an error meaning that the file doesn't exist, then create a new file. (CreateFile, GENERIC_WRITE, maybe exclusive access).

I think that should do it.

Re: How to user fopen function? [modified]

huutribk20011-Jun-06 23:13

huutribk2001

1-Jun-06 23:13

Hi,

HANDLE hFile =CreateFile(m_szFileName,GENERIC_READ, // access (read-write) mode
0, // share mode (exclusive access)
NULL, // pointer to security attributes
OPEN_EXISTING, // how to create
FILE_ATTRIBUTE_NORMAL, // file attributes
NULL // handle to file with attributes to copy
);

I can not get the case as above(A and B), the hFile HANDLE always is 0xffffff when the file not existed and the file opened by orther function (always is INVALID_HANDLE_VALUE for tow case),
the constant ERROR_ACCESS_VIOLATION had not defined.

How way to recognize what the error happends with CreatFile function?
Any help again?

Re: How to user fopen function? [modified]

kakan1-Jun-06 23:43

kakan

1-Jun-06 23:43

Use GetLastError()

Re: How to user fopen function? [modified]

huutribk20014-Jun-06 18:57

huutribk2001

4-Jun-06 18:57

Hi,
I still have problem with deleting file.
I did as below:

HANDLE hFile =CreateFile(m_szFileName,GENERIC_READ, // access (read-write) mode
	0, // share mode (exclusive access)
	NULL, // pointer to security attributes
	OPEN_EXISTING, // how to create
	FILE_ATTRIBUTE_NORMAL, // file attributes
	NULL // handle to file with attributes to copy
	);

	DWORD lerr =0;
	lerr=GetLastError();
	
	if(INVALID_HANDLE_VALUE == hFile){
		if(lerr==ERROR_ACCESS_DENIED){
		fclose(logFile);
		 strcpy(m_szErrorMessage, "SetRecordFileName(): File access error! Please check and try again!");
		 return (false);		
		}
	}else{

		//Create new file
	}


This show the error when the file opened by orther appp but it still be deleted when the app close.

Any help again??

Many thank!

Re: How to user fopen function? [modified]

huutribk20014-Jun-06 21:19

huutribk2001

4-Jun-06 21:19

Hi,
I resolved my problem,
Many thank for help.

Hyperlink ed List Item in a List Control

RajiRaghu1-Jun-06 19:06

RajiRaghu

1-Jun-06 19:06

Any clues to implement a list item as a hyperlinked text using MFC?
On clicking the hyperlinked list item, some other action should take place.

Any clues Please.

Thanks
Raji

Re: Hyperlink ed List Item in a List Control

Nibu babu thomas1-Jun-06 19:21

Nibu babu thomas

1-Jun-06 19:21

RajiRaghu wrote:
Any clues to implement a list item as a hyperlinked text using MFC?

You can OwnerDraw the list box to make it's items to behave like a hyperlink. When the mouse is over the item set the forecolor to blue and underline the text. When out restore previous state. Changing mouse cursor also looks good.

There are selection change event handlers that can do the click part.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Hyperlink ed List Item in a List Control

Hamid_RT1-Jun-06 19:34

Hamid_RT

1-Jun-06 19:34

Its not for your problem but maybe it is some helpful to you Here[^]

whitesky

program executing error

Y_Kaushik1-Jun-06 18:51

Y_Kaushik

1-Jun-06 18:51

Hai to all
whenever i make a new project(MFC(exe)) in vc++ and execute it then it
gave to message box "could not execute:invalid directory(win32,error 267)
and then could not execute the program.
please any one tell me why not my program is execute.
Thanking you

mailing me
Yogi

Re: program executing error

Benoy Bose1-Jun-06 18:59

Benoy Bose

1-Jun-06 18:59

Check the directory settings from the Menu Tools>Options [Directories tab]
If it is incorrect put the correct value

Shutdown function.

Anu_Bala1-Jun-06 18:49

Anu_Bala

1-Jun-06 18:49

Is there any code in vc++ to shut down the local host system and remote machine.One of my friend told there is code in VB to shutdown the system.Is there in MFC?

Re: Shutdown function.

_AnsHUMAN_ 1-Jun-06 18:51

_AnsHUMAN_

1-Jun-06 18:51

ExitWindowsEx()

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Shutdown function.

Benoy Bose1-Jun-06 18:56

Benoy Bose

1-Jun-06 18:56

Actually there no intrinsic function in VB6 for shutdowning the System. It uses Shell TypeLibraries to utilise the Shell features. In MFC I dont' know where there is such a fesiloty available now. But you can shutdown the local system using the function ExitWindowsEx( UINT, DWORD )
The first parameter Indicate action of Exit it should be EWX_SHUTDOWN for shutdowing the system
The second parameter is the type of Shutdown it could be either EWX_FORCE of EWX_FORCEIFHANG

Re: Shutdown function.

Hamid_RT1-Jun-06 19:24

Hamid_RT

1-Jun-06 19:24

See ExitWindowsEx[^]

whitesky

Re: Shutdown function.

ThatsAlok1-Jun-06 23:48

ThatsAlok

1-Jun-06 23:48

Anu_Bala wrote:
One of my friend told there is code in VB to shutdown the system.Is there in MFC?

is this article help :- http://www.codeproject.com/system/ShutDownAlarm.asp[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Query abt dialog box

Member 30398431-Jun-06 17:59

Member 3039843

1-Jun-06 17:59

How can i resize the dialog box controls when i resize the dialog box?? Confused | :confused:

Re: Query abt dialog box

Nibu babu thomas1-Jun-06 18:21

Nibu babu thomas

1-Jun-06 18:21

sruti_p wrote:
How can i resize the dialog box controls when i resize the dialog box??

Well you've got to design a layout manager. Just like the ones you find in Java. Wink | ;)

The best place to trigger a layout is WM_SIZE.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Query abt dialog box

Member 30398431-Jun-06 19:28

Member 3039843

1-Jun-06 19:28

But how can i do this? is there any function for this??
Thanks for reply.

Re: Query abt dialog box

Nibu babu thomas1-Jun-06 19:35

Nibu babu thomas

1-Jun-06 19:35

sruti_p wrote:
But how can i do this? is there any function for this??

It should be easy to find one. Hey CP has one for sure I think I saw one. Unsure | :~

Of course WhiteSky has mentioned two. But they work on a single control. But the above mentioned technique can take a bunch of controls and resize them as your specify.

I think I saw one or two or three... of those layout managers in Code Project. Please check.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Query abt dialog box

Member 30398431-Jun-06 19:48

Member 3039843

1-Jun-06 19:48

Thanks for ur reply. Smile | :)

Re: Query abt dialog box

Benoy Bose1-Jun-06 18:49

Benoy Bose

1-Jun-06 18:49

There is no need to design a layout manager. You just have to resize the dialog box controls as follows.

1. Get the Client rectangle of the Dialog Box. ( Use: GetClientRect(LPRECT))
2. Calculate the new size of controls.
4. Validate whether the dialog controls are valid window ( Use; IsWindow( HWND ))
5. Move dialog controls to the new position i they are valid windows.

Hope it is useful
Thank You

Regards,
Benoy Bose

Re: Query abt dialog box

Nibu babu thomas1-Jun-06 19:02

Nibu babu thomas

1-Jun-06 19:02

Benoy Bose wrote:
There is no need to design a layout manager.

Benoy Bose wrote:
1. Get the Client rectangle of the Dialog Box. ( Use: GetClientRect(LPRECT))
2. Calculate the new size of controls.
4. Validate whether the dialog controls are valid window ( Use; IsWindow( HWND ))
5. Move dialog controls to the new position i they are valid windows.

Which is what the layout manager will do for you. Hmmm | :|

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Query abt dialog box

Benoy Bose1-Jun-06 19:09

Benoy Bose

1-Jun-06 19:09

Layout manager in Java ( Like you said ) will automatically resize the controls in the window.
Since we have a very simple method to resize the controls in MFC, designing a layout manager is overhead to the developer.
In Java it's depends upon the personel interest since there are both the features are readly available.

Re: Query abt dialog box

Nibu babu thomas1-Jun-06 19:15

Nibu babu thomas

1-Jun-06 19:15

Benoy Bose wrote:
Layout manager in Java ( Like you said ) will automatically resize the controls in the window.

Not always. It depends on the way you design it.

Benoy Bose wrote:
Since we have a very simple method to resize the controls in MFC, designing a layout manager is overhead to the developer.

Now imagine she want's to change the layout! Imagine the overhead.

Benoy Bose wrote:
In Java it's depends upon the personel interest since there are both the features are readly available.

That is why you must have a layout manager. When you design, generalize your design. That is what OOP is all about.

If you don't want any layout don't call the layout manager. I love the Java layout manager classes. Smile | :)

Nibu thomas
A Developer

Programming tips[^] My site[^]

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