C / C++ / MFC Discussion Boards

Re: Com Port Read

shakumar_226-Mar-08 19:13

shakumar_22

6-Mar-08 19:13

message was altered pls gothrough the modified message

thanks
shakumar

shakumar

Re: Com Port Read

CPallini6-Mar-08 21:25

CPallini

6-Mar-08 21:25

Please give more info (i.e. what error message you get, if you get one; what is the dwRead value and so on).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Re: Com Port Read

shakumar_226-Mar-08 22:00

shakumar_22

6-Mar-08 22:00

No error Message.
Text File was Creating but no data was writing.
dwRead value on Debug was "0"(zero).

shakumar

Re: Com Port Read

Rajkumar R6-Mar-08 22:30

Rajkumar R

6-Mar-08 22:30

hey, what is this, "char * lpBuf = "";"

where is the buffer allocated to get the data read into it.
and you used fwrite(&lpBuf..), that is why you didn't get access violation.

as i suspected, you used address of operator on a pointer.

just for testing, try
char lpBuf[1024];
ReadFile(, lpBuf,..) not &lpBuf
fwrite(lpBuf,..) not &lpBuf

And you are not using the pointers correctly, join the "Book-Buying Band"[^], two already there.

CreateDesktop and 3DFlip State while using WINDOW-KEY + TAB keys

Jayapal Chandran5-Mar-08 23:13

Jayapal Chandran

5-Mar-08 23:13

After creating and switching into 2 to 3 desktops using CreateDesktop in Windows Vista we used the 3d flip state keys (windows key + tab key) to switch between active windows... it is not working... it works fine in windows xp but not in vista... (3d flip state is when many applications are opened we can toggle between active windows minimized 3d bars in the taskbar... when doing so you can see the toggling of the minimized state of all windows)... can anyone help us with this...

Today's Beautiful Moments are
Tomorrow's Beautiful Memories

I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

vicky000005-Mar-08 22:54

vicky00000

5-Mar-08 22:54

I port my application in vc++ 2005 to vc++ 2008. it works proper other than registry entry code. Is this is bug of visual studio 2008?

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

Rajesh R Subramanian5-Mar-08 22:56

Rajesh R Subramanian

5-Mar-08 22:56

Have you tried debugging? Did the registry function succeed? Did you checked the return value?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

vicky000005-Mar-08 23:05

vicky00000

5-Mar-08 23:05

Thanks for your replay.
It works in xp But shows problem in vista.

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

Rajesh R Subramanian5-Mar-08 23:12

Rajesh R Subramanian

5-Mar-08 23:12

vicky00000 wrote:
It works in xp But shows problem in vista.

I am sorry, I forgot my telescope today and am unable to see your monitor.

Can you please elaborate more on what the problem exactly is? How exactly are you dealing with the registry and what exactly does the registry function returns?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

vicky000005-Mar-08 23:28

vicky00000

5-Mar-08 23:28

Thanks for your replay.

I wrote an applcation in vc++ 2005,in which I create a new registry key and set some value. This one work proper in xp and vista. I port the same code to vc++ 2008. It works in xp, but not in vista.

I hope you can understand my problem.

Thanks.

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

Rajesh R Subramanian5-Mar-08 23:34

Rajesh R Subramanian

5-Mar-08 23:34

vicky00000 wrote:
I wrote an applcation in vc++ 2005,in which I create a new registry key and set some value. This one work proper in xp and vista. I port the same code to vc++ 2008. It works in xp, but not in vista.

Aren't you using some function which would create the new registry key? What is that function returning when you say it wasn't working?

vicky00000 wrote:
I hope you can understand my problem.

I bet nobody can.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

vicky000006-Mar-08 0:28

vicky00000

6-Mar-08 0:28

Thanks for ur replay.

long lRet = RegCreateKeyEx(HKEY_LOCAL_MACHINE,_T("Some Path"), 0, NULL,

REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey,

&dwDisposition);

lRet is 5 in the case vc++ 2008 and in the case vc++ 2005 lRet is 0

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

Rajesh R Subramanian6-Mar-08 0:39

Rajesh R Subramanian

6-Mar-08 0:39

vicky00000 wrote:
lRet is 5 in the case vc++ 2008 and in the case vc++ 2005 lRet is 0

The documentation for RegCreateEx says a non-zero value is returned, when the function fails. 5 is a non-zero value AFAIK.

The documentation also says: use FormatMessage()[^] with the FORMAT_MESSAGE_FROM_SYSTEM flag to get a generic description of the error.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

Mark Salsbery6-Mar-08 5:34

Mark Salsbery

6-Mar-08 5:34

I would suspect it's an access denied error since you're writing to HKEY_LOCAL_MACHINE.

Your app needs to run with elevated privileges to do that.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

vicky000006-Mar-08 20:54

vicky00000

6-Mar-08 20:54

Mark Salsbery,

Yes, this is access denied error, could you please explain how to overcome this problem.

Thanks in advance.

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

Mark Salsbery6-Mar-08 21:10

Mark Salsbery

6-Mar-08 21:10

Writing to HKEY_LOCAL_MACHINE requires the code to run with administrator rights/elevated privileges.

Does it work if you run your app as an administrator?

Why do you need to write to HKEY_LOCAL_MACHINE? That should generally only be done at install time
(running elevated).

If you have common application data that needs to be shared between users, then you should store that at the
recommended application shared data folder, not in the registry.

Unless, of course, all users of your app have no problem running the app as an administrator.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

vicky000006-Mar-08 23:37

vicky00000

6-Mar-08 23:37

Thanks for your valuable suggetion.

With the help of your valuable suggetion i solve my problem by set UAC.
please go through the MSDN link

http://msdn2.microsoft.com/en-us/library/bb384691.aspx">http://msdn2.microsoft.com/en-us/library/bb384608.aspx

http://msdn2.microsoft.com/en-us/library/bb384691.aspx
[

http://msdn2.microsoft.com/en-us/library/bb384691.aspx" target="_blank" title="New Window">^]

To set this linker option in the Visual Studio development environment
Open the project's Property Pages dialog box.
Expand the Configuration Properties node.

Expand the Linker node.

Select the Manifest File property page.

Modify the Enable User Account Control (UAC), UAC Execution Level, and UAC Bypass UI Protection properties.

To set this linker option programmatically
See EnableUAC(), UACExecutionLevel(), and UACUIAccess().

Thanks to all and code project

with regards
vicky00000

Re: I port my application in vc++ 2005 to vc++ 2008 -registry entry code could not work properly.

Mark Salsbery7-Mar-08 5:45

Mark Salsbery

7-Mar-08 5:45

Awesome!

Thanks for the update!

Cheers,
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

create a graph

Chandrasekharan P5-Mar-08 22:53

Chandrasekharan P

5-Mar-08 22:53

i have a dialog box which shows a video and some controls now i want to implement a graph. what is the procedure to create a graph dynamically? i also need to read data from the file and plot it into the graph. guess that is the second part.. not thinking about that.. priority is to create a graph.

Re: create a graph

Rajesh R Subramanian5-Mar-08 22:58

Rajesh R Subramanian

5-Mar-08 22:58

See if this[^] helps.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: create a graph

toxcct5-Mar-08 23:56

toxcct

5-Mar-08 23:56

1) by searching google

2) by searching codeproject articles

3) by searching again and again...

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: create a graph

Chandrasekharan P6-Mar-08 0:00

Chandrasekharan P

6-Mar-08 0:00

well i was expecting something like this from somebody.. and yes i am doing what u have told me... Smile | :)

.. the last point has been really taken into consideration...

Re: create a graph

toxcct6-Mar-08 0:02

toxcct

6-Mar-08 0:02

lol

anyway, Cédric's Charting control[^] is very excelent Wink | ;)

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: create a graph

Chandrasekharan P6-Mar-08 0:38

Chandrasekharan P

6-Mar-08 0:38

yes.. actually rajesh send me that link.. i think that will be of great help to me... .. will get back if i need some help..

Re: create a graph

toxcct6-Mar-08 0:43

toxcct

6-Mar-08 0:43

if you need some help directly related to the use of that control, better ask in the forum at the bottom of the article itself, so that the author will be email notified, and will reply come back to you problem more easily.

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

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