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With a few modifications it worked like a champ. Thanks.
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Someone can send me an example of an MDI Application where I can open file of different extension, (extension created by myself)
If not, how register the extensions...and no more obtain the following message : IDP_FAILED_TO_CREATE ?
Thank a lot.
Leo.
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It's all done in OnOpenDocument in your View class, although from memory some of it routes back through your App class as well with the first file you open. Just overload it, show your own dialog, with the extensions shown you want to support, then examine the return and load the file appropropriately.
Christian
I've learned that you cannot make someone love you. All you can do is stalk them and hope they panic and give in.
The early bird may get the worm, but it's the second mouse that gets the cheese.
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i'm trying to use SetScrollSizes() and ScrollToPosition() in my program. I've put #include <afxwin.h> in my program. However, the debugger still keep saying "undeclared identifier".
What happen?????? 
p.s.: again....it works in my previous program....i just copy the code to my new program....
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i have two C files and want to add to my new project. I've used these files in MFC programming before and everything fines. However, this time when i compiled these files, i got the following error message:
"fatal error C1010: unexpected end of file while looking for precompiled header directive"
I didn't change anything.......then i tried to just compile the file (this lead me to create a new project).....i used the same directory...same location...nothing change.......and it works!!!!!!!!!!
Does anyone know what happeneD? 
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Your project is configured to use precompiled headers. Usually precompiled headers are included in the stdafx.h file. To solve your problem do one of the following:
(a) put the line
#include "stdafx.h"
in your .c files
(b)
go to FileView in the workspace window. Right-click on your .c file and select "Settings". Go to C/C++ page and select "Precompiled headers" category. Click on "Not using precompiled headers" and OK. YOu have to repeat this for all .c files.
Tomasz Sowinski -- http://www.shooltz.com.pl
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Hi Tomasz,
Thanks for your quick response!!! You are superb!!!!!
        
Richard
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Hi,,
I'm having problem with loading and saving (serializable) bmp files...
but i know how to do that in a dialog base application,,,,
I like to know how to do that in MDI...
Thanks
Ehsan 
Ehsan Behboudi
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Hi Ehsan, I have the same problem with my MDI application and i don't find out the bug.
Maybe you found it
Fred
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I am using a listbox control to show a report on a record.
I can load the listbox the first time but i can not clear it for a second loading.
The new data just gets appended to the end of the list.
I am using the following to load the listbox
nIndex gets reset everytime the listbox is set.
m_choslist.InsertString(nIndex,msg);
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call ResetContent() method on the listbox.
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try yourlist.ResetContent();
gm
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I have one problem with my MDI Application.
I don't manage to implement correctly OnOpenDocument in my view Class. Someone can give one examlpe ?
Thank for advance for your help
Fred.
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class CData
{
// members
CData* pChildList;
}
CList<cstruct, cstruct&="">* pDataList, pTempList;
pTempList = pDataList->GetHead()->pChildList; //how to correct this line?
How can I make pTempList to point to pChildList?
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Change 'class CData' to 'struct CData' or make pChildList a public member. Members of classes are private by default, while default struct members access is set to public.
Tomasz Sowinski -- http://www.shooltz.com.pl
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the class CData is public alright?. the compiler gave this error msg:
error C2582: 'operator =' function is unavailable
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Change your variable declaration to:
CList* pDataList, pTempList;
to
CList* pDataList, *pTempList;
pTempList without asterisk declares object, not a pointer to an object.
Tomasz Sowinski -- http://www.shooltz.com.pl
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What i have to do is to limit the amount of users able to access an application over the network at the same time. The application i am talking about ist not a client server app. It's just something like a calculator sitting on a network cd-rom drive.
i have to find out, how many users started this application on their workstation. If the limit of users has been reached, the next user shall not be able to start it.
i have not the slightest idea how to achieve this. Could someone please give me a hint?
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So the application is executed on separate machines, right? In this case you need some place to keep "shared application state" - number of users. You can store it in some database available to all workstations or in a file located on network server. When your app starts, it should increment the number of users. During app shutdown you should decrement this number.
The hard part begins when you realize that application can crash and leave inconsistent information in database/shared file. Possible workaround would be saving separate 'record' for each workstation running your program. This record would contain workstation ID and "last access time". The time field is updated periodically when program runs, the updating stops after crash. If application crashes, the record would remain, but another instance of the application could be able to determine - by using time field - that the record is invalid. In this case, you need common time settings on all workstations.
Tomasz Sowinski -- http://www.shooltz.com.pl
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Thank you. I was already thinking about some kind of file located on a network server. The thing with the timestamp is a good idea. Would be even better if i could use server time. I will have to figure that out.
What really troubles me is the installation of such a thing. i think the user has to be admin to install the application. And at which directory should that file be stored. It should be definitely a common directory because every workstation has to access it. Every workstation should have the writeaccess to this directory. i don't think it will be the system-directory because in most cases only admin has writeaccess to the system-directory. So how do i figure out which directory to use? I can't ask the user during installation "please tell me a common directory on the network-server where i can put the secret access control file".
So as always the details are killing me. any further help would be appriciated. 
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> I can't ask the user during installation "please tell
> me a common directory on the network-server where i can
> put the secret access control file".
The installer should read this info from some config file, editable by the network admin. Note that the location should be specified using \\server\share syntax - without network drive letters, which may be assigned differently on different workstations.
Tomasz Sowinski -- http://www.shooltz.com.pl
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I have never done anything like that, but it should be possible to ask the server (Win NT/2000?) how many users there is that has the file opened...
I don't see any other way to do it.
I have to say that I don't know how to deny other users access, sorry...
- Anders
Money talks, but all mine ever says is "Goodbye!"
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There was an idea posted in, I think, DDJ a few years about which suggested creating a DirectPlay session and having each client join it. You can very easily restrict the number of allowed connections (players). It should be a lot harder to crack than something like a network share reference count.
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The only good way to do this is to write two programs - a client service that monitors execution of programs, and a server side service that kees track of open instances.
1) When the user clicks on the targetted executable, the client side service would contact the server and ask if it's okay to run the app in question.
2) The server side would return an appropriate response associated with the number of users it thinks is using the software in question
3) The client side would allow/disallow access based on the response from the server.
4) Every x number of seconds, the client side service would tell the server side service whether or not the app was still running. You can also make it so that the client side would shut dwn the app in question if for some reason it could not contact the server after x minutes (or seconds).
5) If the server doesn't get a signal from the client side in x number of secods, it could assume that the app isn't running any longer and can automatically free up one reference to the executable, thereby allowing another user to use the executable.
This mechanism could be used to control access to any number of applications through a database or the registry.
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I have a problem with Threads !In a console
application ,I am trying to create 10 threads using
CreateThread(..). Each Thread created tries to call the
interface function which will add records to database !The
problem is I have given separate ThreadProcs for each thread
.But, what happens is some threads log more than once.So, the
loggings of some threads are lost !But, teh number of loggings
are correct !How can I rectify the problem !
The Mutexes need not do anything here .But, i can get the
correct result only
if I use Mutex at the start of each ThreadProc .It is logically
wrong !How can i rectify the problem !
Thanx in advance for the help !
Regards,
yamini
Y.Yamini Devi.
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