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Didn't you already ask that question some weeks ago ? I vaguely remember somebody asking question about usb and leds.
Anyway, you can't turn on leds with usb. What you probably wanted to say is that you have a device which is connected to USB and which contain some leds that you can turn on. The answer is simple: nobody here will be able to help you because you didn't provide any usefull information.
In brief what you have to do is get the handle to the device driver (which should be supplied with the device, otherwise you have a problem). To do that, use CreateFile and provide the driver symbolic name (which should be included in the documentation that comes with the device, otherwise you have a problem). Then you will be able to send device specific control codes (same remark here).
So, check the doc that was provided with you device or find some.
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No its first time I asked this question and i was not sure its possible or no,but thanks for your answer. 
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BTW do you know how does other devices works with USB ports like mouse?
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First go through some tutorials on USB programming.
-@SuDhIrKuMaR@-
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First, you need to identify the manufacturer of the board, and any identifying information on it. Contact the manufacturer for programming information. Most of the time they will provide a library for communication with the board, so that you don't have to know the low-level details. They'll provide a function like "SetBoardLEDs(...)" if that's something valid for you to do.
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No I want to make a simple board and then I want to turn on leds on the board.
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Hello
I am trying to link an application using Visual C++ 2008 and have all the imported functions in the resulting PE's import table include the function name (import by name), however some functions are being linked in as import by ordinal (mostly from WSOCK32.DLL) even though the names exists for theses function in their respective dll's export directory.
See this screenshot for an example:
http://i26.tinypic.com/2n1w6bp.jpg
Is their a way to force all imports to be linked by name and not ordinal?
Many thanks in advance.
-jwalsh
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Hi i want to impersonate the process in SYSTEM, Logged in user and specified user.
for Specified user i am giving the username and password and impersonation is working fine. The code is taken from http://msdn.microsoft.com/en-us/library/aa379608(VS.85).aspx[^]. The main process starts in SYSTEM account so by only using CreateProcess() api i can handle the case of SYSTEM user. But i am not finding any way to handle the logged in user case. How to get the token for logged in user?
Any help in this context is really appreciated.
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Using Visual Studio 2005 with Client and Server projects, I would now like to clone the client project several times - all within the same solution. This is to keep all the include/libs and other project setting the same.
In the past I just added a new project and copied the code in and redone all the other project settings.
Are they another way to do this. Renaming just causes problems
Many thanks,
Andy.
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Andy202 wrote: Renaming just causes problems
I personally just copy the project (.prj) file (using Windows Explorer), rename it, open the file in
a text editor, and do all the renaming there (the project file is XML).
Then the new project can be added to a solution in the IDE, where the project files from
the cloned project can be removed.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Hey Mark, what's the context for this need? Why do I need a cloned project in the same solution? Or even at all?
led mike
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I've done it making plugin modules so I don't have to set up
duplicate settings for new module projects. Just a copy of an existing
project folder is easy, but renaming just the project file name still leaves
the old project name in the project settings XML.
Mark Salsbery
Microsoft MVP - Visual C++
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One thing to watch is there's a GUID in the project file that links it to the solution. When you copy the project file, you need to generate a new GUID so that the new, cloned project has a different GUID from it's predecessor.
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Good to know! Thanks Gary!
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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You're welcome. I had to reverse-engineer the Visual Studio project and solution file formats a while back in order to automate our product branching process. I still don't understand it completely, but I found an approach that works for what we need.
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Using Visual C++ 6.0 MFC in SDI application
I don't understand how to clear the client window that I had been drawing in when the user selects the menu item "New" from the main File menu. What code should be used to clear the old window and where should that code go?
Thanks!
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You can update all views then put a handler in View class and clean the view in the handler.
-@SuDhIrKuMaR@-
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Hello all,
I am working on Client Server architecture.In this multiple servers,
multiple Clients can be there.I am facing one problem here please suggest some solution for that....
take an example If I have two servers running on two different computers A & B.I have database on computer A. Both servers are connected to same database which is lying on A. Now if my A server has done some operation like Add or Delete data in database then How it can be reflected in Server B cache.
I mean how server B can be intimated that this operation has been done so it can get that perticular record only from database.
I can't take all data because I have around 5 lakhs of records in database so fetching all 5 lakhs records for one single record is not feasible & it will take too much time also.
So is there any other way than broadcasting and changing in database.please suggest me.
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I have SQL Server 2005 instaled in a server system
Can I programatically connect to this database system (using a VC application .exe) and execute
a SQL query to create a table and insert/update few records into it.
Do we have MFC Classes and appropriate member functions to do the above task ?
Thanks in advance.
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Do you know about this page http://www.codeproject.com/KB/database/[^]?
BTW it's a secret: don't divulgate.
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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CPallini wrote: BTW it's a secret: don't divulgate.
Dont worry you can tell us your secrets only 5,197,414 members can be see them. 
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Hamid. wrote: only 5,197,414
You're wrong. 
Hint: you don't need being a member to see posts and replies.
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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Yeah you right dont need ,so hurry up to divulgate secrets .
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ODBC, ADO database connectivity- CDatabase, CDaoDatabase class etc. will help you.
Somethings seem HARD to do, until we know how to do them.
 _AnShUmAn_
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I have a Visual C++ program which has compiled and run many times through various editings.
Suddenly today it has started faulting with these 16 unresolved externals. What is happening?
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipGetImageEncodersSize@8
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipGetImageEncoders@12
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdiplusStartup@12
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipCreateBitmapFromFile@8
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipCreateBitmapFromFileICM@8
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipFree@4
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipAlloc@4
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipCloneImage@8
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipDisposeImage@4
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipCreateHBITMAPFromBitmap@12
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipGetImageWidth@8
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipGetImageHeight@8
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdiplusShutdown@4
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipCreateBitmapFromGdiDib@12
1>IMAGES.obj : error LNK2001: unresolved external symbol _EncoderQuality
1>IMAGES.obj : error LNK2001: unresolved external symbol _GdipSaveImageToFile@16
1>C:\2d\ppp_vc\Release\ppp_vc.exe : fatal error LNK1120: 16 unresolved externals
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