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toxcct wrote:
GetWindowPos()
There is no such method in the Win32 API...
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Hi guys, i'm writing an intros but it drives me crazy when someone says:
"Hey it says that i have no msvcrt/d.dll"
Is there any chanse to link those dlls so their copying into the intro dir wouldn't be needed?
Grtz.
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You have two options.
1. Don't use the c run time - use C++ functions.
2. Distribute the msvcrt dll
Also, NEVER distribute a debug build, so that no-one ever asks you for a debug DLL again.
Christian
I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer
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Hi!
I'm writing a program which needs to recieve a lot of data though a socket. Another application sends a lot of small portions (like 50 byte) of data (measurement data) to it over the network, like 1000 messages per second.
Which socket communication is the best/fastest? Right now I testet a blocking CSocket in its own thread, but that really slows down the machine. But how should I do instead? Any tip? Should I use CAsyncSocket instead, and how? Blocking or non blocking?
Thankful for any suggestion!!
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I used
SetWindowPos(NULL, 0, 0, 100, 100, SWP_NOZORDER);
in OnInitDiaolog() (msvsC++6,.NET, dialog based project)
and as a result window appeared in the middle of the screen.
Then I try SetWindowPlacment(), it works, but only if window not hidden at startup.
How can I move window to (0,0) in OnInitDiaolog()?
(at present I use SetWindowPos(NULL, -1, 0,...) 
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Perhaps you need to clear the dialog style's DS_CENTER bit?
/ravi
My new year's resolution: 2048 x 1536
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ravib@ravib.com
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No. With DS_CENTER all ok (it's not set). Function works correctly if you set any position except (0, 0). If you move window in (0,0) window appears in the center that's my problem.
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hi all ,
help me how to get the current system name in the program..
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Are you talking about gethostname()?
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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which class does this fn belong to ..
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It belongs to no class. It's just a Win32 function.
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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Hi.
I'm developing a program with visual C++ that creates multiple threads and each thread creates a new instance of the same DLL (which I have the the code, but I didn't developed it).
The problem I'm having is that when I create the first thread, the DLL is instantiated correctly but when I create the second thread and try to create a new instance of the dll, I didn't actually create a new instance, but just makes an instance of the DLL already instantiated, and so I overwrite some variables and stuffs like that.
If, instead create two threads I execute the program twice, running at the same time, I can make new instances of the DLL. Why in this way I can make a new instance of the DLL and using threads I can't?
How do I know if the DLL was created as a multithreaded DLL?
And another question is if the DLL wasn't created a multithreade DLL, how can I change this?
Dennis
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This is not about multithreaded dll - this is how the windows handles the dll libraries - it is loaded only once in the memory for saving resources. When you call subsequent LoadLibrary it simply increments the usage counter.
If you LoadLibrary from other process, it is a different story. There are some nifty stuff inside the windows, but for you it's like the dll is loaded again --> you can load your library only once into process memory.
Difference between library compiled as multithreaded or singlethreaded is AFAIK only difference with c runtime support libraries used. If you will not use functions like printf etc, there is no difference between dll compiled as multithreaded or singlethreaded.
There's no way, how to determine, if the dll was compiled as multithreaded, neither way how to change it (without having sources and recompile).
But for your problem as you described, it makes no difference I guess.
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There are quite a few run-time library functions that have global/static variables whose storage specification changes for the multithreaded versions. The multithreaded versions use the __declspec( thread ) keywords to specify thread-local storage for those variables which means that each thread gets its own copies of each variable.
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Thank you. Didn't know it. Or better didn't think about 
I just got it as - I don't know which functions have some global/static parts and I don't know if it can or cannot change. Therefore I decided to took the run-time library as a block - either use it, but then compile carefully with appropriate switch or dump it completely.
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I'm not using LoadLibrary method.
I'm importing the .tlb of the DLL file and then linking to my program.
To create a new instance of the DLL, im using the methods CoInitializeEx with the parameters 0 and COINIT_MULTITHREADED and then CoCreateInstance with the parameters CLSID_DLL, NULL, CLSCTX_ALL, IID_IUnknown, (LPVOID*)&pointer);
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CoCreateInstance does some COM dancing around and then calls LoadLibrary for you.
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It sounds to me like your problem is with global variables in the DLL - i.e. there's only one variable X but when you run two threads they'll both be able to change it. Same thing applies to any static variables in functions.
If this is the problem then it implies that the DLL's author wasn't expecting the DLL to be run in different threads in which case it assumedly wasn't linked with the Multithreaded runtime libraries which will create a different set of issues.
A solution is not too easy. You could:
1. Use thread local storage (see "Using Thread Local Storage in a Dynamic-Link Library" in the SDK documentation) to sort out the variables (or use __declspec(thread) which might be easier). However, you will need to understand which variables should and which shouldn't be accessable to all threads.
2. Re-build using the mutli-threaded libraries.
However, You might still have issues with any resources the DLL uses (such as intentionally shared variables). To sort this out you'd need to use some type of synchronisation object such as a mutex (or create a critical section) to control multi-threaded access. There's lots of stuff about this in the SDK.
Depending what the DLLs actually does, it might be easier to rewite it yourself or look for an alternative.
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About the item 1, I will analyze further the method __declspec(thread) and try to use it.
But in the 2nd item, you told me to rebuild DLL using the multi-threaded libraries. In Visual C++ 6, Project->Settings, C/C++ tab with Code Generation option selected, it has an combo box called "Use run-time library". The option selected there already is "Multithreaded DLL". There's another way to configure this? How it does?
Dennis
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hi all
can any body help me how to create dynamic menus in adlg based applications
generating popup menus(CMenu) dynamically ..
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hi pal thanx 4 ur reply,
but i've been using that i nead to create different popup menus at differnt locations
like iam creating a Explorer kind of thing i should get different menus dynamically when i select each item from a tree control of the explorer
for example the windows explorer like...
The menu generated should be changed dynamically when i change my selection in the tree
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