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Maybe I look too beginner for asking:
"From where can I learn how to comunicate with USB ports?"
Thanks for each kind of help...
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That all depends on what type of "communication" you are referring to.
"Love people and use things, not love things and use people." - Unknown
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Hi buddy!
When I close my dialog base app, I encounter an error that says:
"The instruction at "0x45a525" referenced memory at "0x400012". The memory couldn't be "read". Click on OK to terminate the program."
My application cosists of tens of DLLs 
could anybody give me an idea to solve this problem PLS...
modified on Monday, March 31, 2008 9:06 AM
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Yes, use your debugger to see more in details what is happening, where the code crashes, the call stack, ...
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Did you use of pointers in your project?
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hi
i prepared one project in dialog based application but i need database suppot for this appl;ication how to solve it?
*****THANKS N ADVANCE****
Mathen.K
(I WILL TRY MY LEVEL BEST )
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First of all you need to go to "control panel\Administrative Tools\Data Sources (ODBC)" and prepare a DSN (Data Source Name). You should define a path to your database file (e.g MyDatabase.mdb) there.
After that you must add a class to your project, base on ODBC, and define that DSN as database source.
finally costruct an object from new class and enjoy!
Note that you can change the path of your database file in "GetDefault...()"
function within your new database class (Sorry! I couldn't remember the full name of that function  )
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You can always do this even after a project has been created by using ClassWizard (Ctrl+W) to derive a class from CRecordset. A DSN (that layer between your code and the database) is nice but it is not necessary.
"Love people and use things, not love things and use people." - Unknown
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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I am stuck trying to develop an application in Visual C++ 6 and MFC. Unfortunately I have ran into a problem before even getting started. When I use the ClassWizard to create a new class for a dialog (or try to use the ClassWizard generally) Visual C++ hangs. It is not possible to exit VC from the task manager or kill the msdev process, It doen't even die if I log off and log in again. The only way to kill it is to press the power button.
The workspace I have created is a dialog based Mfc AppWizard(exe) with 3d controls and ActiveX. I have the same problem with VC6 SP5 and without any sp installed. The computer I use is Windows XP SP2.
Does anybody have an idea what the problem is and what I can do about it?
//Thanks in advance
Martin
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Hi Martin! Probably someone has a better answer... this is just a shot into the blue.
Try to cleanup generated files, they will be recreated automatically when needed. Delete files with the following extension: .ncb .opt .plg .aps .clw - especially the last one always makes problem for me when I add files/classes without using the wizard, I delete it in regular intervals.
If VC crashs you might need to end the hanging process in the task manager, the process is called MSDEV.EXE. That's the quickest solution, if you don't end it you can often not restart VC.
Hope it helps.
/M
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Moak wrote: If VC crashs you might need to end the hanging process in the task manager, the process is called MSDEV.EXE. That's the quickest solution, if you don't end it you can often not restart VC.
Based on the OP's "It is not possible to exit VC from the task manager or kill the msdev process..." comment, he appears to have already tried that. 
"Love people and use things, not love things and use people." - Unknown
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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DavidCrow wrote: Based on the OP's "It is not possible to exit VC from the task manager or kill the msdev process..." comment, he appears to have already tried that.
-- Please insert coffee here--
Sorry I completely missed that in the original posting!?! How could I have missed that. I think this summertime change makes me crazier than I thought. I promise to improve my caffeine level before posting. 
/M
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Worth a try. Is there a patch to debug static variables for vc6 (preprocessor pack)? The only one I have is for sp5.
/Martin
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Hei,
Register the VC6 environment variables and see if that fixes your problem.
Best Wishes,
-David Delaune
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Martin966 wrote: It is not possible to exit VC from the task manager or kill the msdev process
Try using Process Explorer from sysinternals. It's more effective than Task Manager at killing tasks. Though I can't guarantee that it will kill msdev. It does, however, kill VS 2005 when task manager fails so I'm assuming that it will work for msdev too.
Kevin
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Hi all,
I am trying to a add a Regitry Entry using MFC api's.
Suppose i want to give my program file address to the registry value.....
Its not taking full address its just taking 25 characters
for example:-
C:\Program Files\Data
Can anybosy please help me in this.....
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neha.agarwal27 wrote: I am trying to a add a Regitry Entry using MFC api's.
Can you please show us the relevant code? Because
1. We can't answer solely on assumptions
2. And there's a pillar right next to your cubicle, so I am not able to see your monitor.
Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP
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i think u r buffer size may be 25 characters or u r writing only 25 characters
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neha.agarwal27 wrote: I am trying to a add a Regitry Entry using MFC api's.
MFC has an API for the registry?
.
neha.agarwal27 wrote: Suppose i want to give my program file address to the registry value.....
Its not taking full address its just taking 25 characters
for example:-
C:\Program Files\Data
Be aware that RegSetValueEx's cbData parameter should be the size of the string expressed in bytes, i.e. (string length + 1)*2 for UNICODE strings.
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
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Thanks for your reply.....
it worked fine with my code....
now my problem is my code is creating registry enteries fine in xp but its not creating it in vista but when i run my program as administrator it creates the enteries....
how can i remove my problem...
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Hence run the program as administrator.
Seriously, I don't know. Maybe you'll have more luck on Vista[^] forum.
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
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and when i am trying to add binary entry(REG_BINARY), like if i want to add 11 01 10 11 then in registry only 00 00 00 00 is added....
can you tell me the problem
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Could you please post the relevant code?
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
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RegCreateKeyEx ( hkey, (LPCTSTR) str1, 0, NULL, REG_OPTION_NON_VOLATILE,
KEY_CREATE_SUB_KEY | KEY_ALL_ACCESS, NULL, &childkey, &dispos ) ;
RegSetValueEx ( childkey, (LPCTSTR)str2, 0, valur_type, (const BYTE*) (LPCTSTR)str4, (str4.GetLength()+1)*2 ) ;
RegCloseKey ( childkey ) ;
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