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SD1208 wrote: The goal is peer discovery and exchange of configuration information between the hosts, between systems on a subnet-not over the internet but a LAN.
You mean so that they know about each other without having a set server and client? I still don't follow what you're trying to achieve. Why don't you describe functionally what you're trying to achieve instead.
SD1208 wrote: I understand that peer-to-peer concept of not having a server, I guess where I'm kind of stuck is how to manage each application having essentially being a client and server. Would each aspect being handled in a separate thread by the ideal method?
Multiple threads would probably be ideal if a program is expected to work as both a server and client.
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If you are doing this on a company LAN, you should give your IT department a heads up. It is possible they have alerts set up on their monitoring software to notify them whenever there is UDP Broadcast activity on their network.
Soren Madsen
"When you don't know what you're doing it's best to do it quickly" - Jase #DuckDynasty
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Quote: I understand that peer-to-peer concept of not having a server, I guess where I'm kind of stuck is how to manage each application having essentially being a client and server. Would each aspect being handled in a separate thread by the ideal method?
Maybe I am miss-understanding, but I suspect that SD1208 is not understanding the phrases client and server. Does this help any:
Any application on any computer can take the server role or client role. Server in TCP/IP does not refer to a "SERVER" computer that is running a "SERVER" operating system.
The server application must start first. It opens a port and listens for any client application. The client connects to a port already opened by a server. Then the two applications can chat.
Thanks for your time
If you work with telemetry, please check this bulletin board: http://www.bkelly.ws/irig_106/
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error LNK1104: cannot open file 'uafxcwd.lib'
I have installed vs 2012 express edition.
To use mfc i have installed wdk7.1 and set path for mfc libraries and includes directories.
after that i write a code:
#include<afxwin.h>;
struct CSimpleApp : public CWinApp
{
BOOL InitInstance() { return TRUE; }
};
CSimpleApp theApp;
But the above mentioned 1 link error lnk1104 cannot open file 'uafxcwd.lib' is coming.
I tried static and shared mfc and also trid with different character set.
Anybody can solve pls?
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Express edition products do not include MFC, and as far as I am aware the Windows Driver Kit does not either. A quick search of the various directories will tell whether this lib file exists or not.
Veni, vidi, abiit domum
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Dear Richard,
I want to use express version with wdk for mfc programming. can you suggest me any way?
Regards,
Prasun
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WDK is the Windows Driver Kit, it has nothing to do with MFC.
Veni, vidi, abiit domum
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If you want to use MFC, you usually have to pay for VisualStudio. I usually use the "Professional" version, it should have everything you need. Only thing that's useful that any of the other versions have that would be nice is the remote debugger, you have to get one of the other versions for that (for debugging remotely on embedded systems and/or just remote systems).
It is expensive, but if you're a professional, your company should probably cover the cost. If you're a student, I believe you can get student pricing (may depend on university). If you're neither, you may have to consider using an open source alternative. There's quite a few alternative frameworks out there (wxWidgets, Qt, etc.).
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I have a problem where i have two dlls with same name.
does changing CLSIDs of any one of it is advisable ? or any other alternate??
jigar
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Obviously they would need different CLSIDs as there would be no way of distinguishing between them otherwise. The question remains: why?
Veni, vidi, abiit domum
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I have a situation where there are two applications A & B,using C.dll ,problem is that for A, development is frozen,while for B there is a huge overhaul expected in C.dll which will then break A,So either i need to create a new dll for B and rewrite same code of C.dll and do modification ,or i can just copy C.dll project and change its ProgGUID,CLSIDs and do modifications. indeed not a neat solution
jigar
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The obvious answer is to create a copy of C.DLL source, probably by starting a new branch in your source control system. You can give it a different name and CLSID and use that for the development, while leaving the operational version intact. This is fairly standard procedure for any project.
Veni, vidi, abiit domum
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Having two dlls with the same name is not advisable in Windows.
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[Dynamic-Link Library Redirection]
"To use DLL redirection, create a redirection file for your application. The redirection file must be named as follows: App_name.local. For example, if the application name is Editor.exe, the redirection file should be named Editor.exe.local. You must install the .local file in the application directory. You must also install the DLLs in the application directory."
With best wishes,
Vita
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i am use Visual Studio 2012
when i compile my project i get next error:
C2039: 'AtlGetCommCtrlVersion' : is not a member of 'ATL'
error C3861: 'AtlGetCommCtrlVersion': identifier not found
how to fix this.
thanks.
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Did you follow the link and read the comments from Microsoft?
Veni, vidi, abiit domum
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Do not know how but I understood 
i am commented some code in files: atlapp.h and atlgdi.h
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Hi,
I am using MSXML parser. I need to handle exceptions for load xml file , parse it etc.
Cam anyone plz give me some reference for this?
Thanks
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sma123# wrote: Cam anyone plz give me some reference for this?
Reference for what exactly? Exception handling is the same whatever your code is doing.
Veni, vidi, abiit domum
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Windows 7, Visual Studio 2008, C++, not managed code
So far, it seems that the best way to start a thread is with this:
uintptr_t _beginthreadex(
void *security,
unsigned stack_size,
unsigned ( __stdcall *start_address )( void * ),
void *arglist,
unsigned initflag,
unsigned *thrdaddr
);
found here: http://msdn.microsoft.com/en-us/library/kdzttdcb(v=vs.90).aspx[^]
I found the article in CodeProject about starting a class as the thread and am using that.
The one argument to the thread is the address of a structure used to pass data between the main app and the thread. Call it common_structure. The method that will be started is Main_TCP_Class( void * common_struct ){...} (This class will handle my TCP/IP work and that thread will run for the duration so it seems Main_TCP_Class() is an aptly descriptive name.)
Question: Does the act of starting the thread with _beginthreadex(...) instantiate the class? If not, there will be some follow up questions on this.
If so, that would mean, I presume, that the constructor runs before method Main_TCP_Class() runs. And that means that none of the data in common_structure is accessible until Main_TCP_Class has started and has captured the pointer in the argument.
Is this correct? Any pitfalls that I should be aware of?
Thanks for your time
If you work with telemetry, please check this bulletin board: http://www.bkelly.ws/irig_106/
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bkelly13 wrote: Does the act of starting the thread with _beginthreadex(...) instantiate the class?
No, it merely starts the thread at the address pointed to by start_address. You may be better using the CreateThread[^] call, which is more closely integrated to the Win32 API. Neither _beginthreadex nor CreateThread have any knowledge of the structure of your program, in terms of classes and other structures.
Veni, vidi, abiit domum
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RE: No, it merely starts the thread at the address pointed to by start_address.
That makes sense, the class must be instantiated before passing in the one method to CreateThread().
But, since the main app has created the class and has its address, what prohibits the main app from calling methods in the class? Yes, I am mostly aware of problems that may cause. My intent is to call methods such as:
Set_Logging_Flag( bool new_value );
bool Get_Logging_Flag();
These methods would just set flags that the thread would detect then act upon.
Note that I wrote "mostly aware of" as I am certain there are things of which I am not aware.
Edit shortly later:
Following the codeproject article resulted in the following in the dot H file:
void Main_TCP_Class( void * common_structure );
static unsigned __stdcall ThreadStaticEntryPoint( void * pThis )
{
C_Server_TCP_Win_Api * p_C_Server_TCP_Win_Api = (C_Server_TCP_Win_Api * )pThis;
p_C_Server_TCP_Win_Api->Main_TCP_Class( m_common_data );
return 1;
...
static st_server_tcp_common_structure *m_common_data;
}
The compile failed until I declared the common structure static. OK. But one of the goals was to pass one argument to the thread and that argument could be a structure through which the main app communicates with the thread.
Possible Revelation: Since we declare that structure as static, and the main app instantiates the class before starting it as a thread, it has access to that static class regardless of how the class is run. So why go through all this to pass the argument?
Thanks for your time
If you work with telemetry, please check this bulletin board: http://www.bkelly.ws/irig_106/
modified 26-Nov-13 16:32pm.
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bkelly13 wrote: what prohibits the main app from calling methods in the class?
Nothing at all, but those methods will be running in a different thread so will have no effect on the thread that you previously started. Threads communicate by using common areas of memory, and they must each synchronise their actions so they don't corrupt the space.
bkelly13 wrote: Following the codeproject article
Questions about articles are best posted in the forum at the end of the article; the author is the best person to answer questions on the structure of their code.
Veni, vidi, abiit domum
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