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Drawings are not saved by Windows. Instead, when the window needs to be repainted, a WM_PAINT message is sent to it so that it can draw itself. So, if you don't put your drawing code into the OnPaint function, then it will be lost the next time your window is repainted.
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Hi all,
i want to use the DatetimeCtrl as a button and use an Edit box along this.
how can set the selected date valuse in Edit box.
thanks in advance.
IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH
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Hello,
I have an application which is on the verge of completion .In there I have about 24 classes derived from MFCs and 15 generic classes apart from the 2 classes that are MainFrm and app class .
Now while editing any of my programs if I press the ENTER key the the cursor takes about 20 secs to come to the next line.
This doesn't happen with Word ,Excel.So concluded that there must be some problem with the my application rather the memory of my computer.
I should now reduce the size of my application.
But how should I do that?Or Is there any other problem?
Regards
Pritha
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prithaa wrote: Now while editing any of my programs if I press the ENTER key the the cursor takes about 20 secs to come to the next line.
Which application ?? You mean the IDE (visual studio), or your own application ? What are you doing there when you press enter ?
Did you try to see what is taking so much time ?
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Hello
Thanks Cedric
When I am in my Workspace typing or editing my programs at that time the cursor takes 20 secs to come to the next line if an ENTER is pressed.
Pritha
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prithaa wrote: I should now reduce the size of my application.
Close the IDE and delete the .ncb and .opt file in the project folder. Then restart the msdev.
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Hello,
Thanks.It is done.
If you are not annoyed when I ask
What are these files are and when should I delete them?
Then please answer.
Thank you .The problem is solved.
Pritha
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.ncb file is the intellisense database file.
The .opt file contains the build logs.
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hi
i have an MFC dialog based application...based in a my own class not CDialog..
when i insert a new dialog and create a new class ... icouldnt find my own class in the drop down list..where about two weeks ago i inserted anew dialog and founnd my class among the base class...
what did go wrong ....its really confusing and driving me crazy....
pleease help me with this...my work has stopped because of this
thank u all
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First Check your file are added to you project. if it is already added, try deleting the "clw" file in the project folder.
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lahom wrote: i have an MFC dialog based application...based in a my own class not CDialog..
Your class is derived from CDialog? 
lahom wrote: icouldnt find my own class in the drop down list..
You mean in the dropdown list of class wizard?
if so, I think your Project's classWizard information might be corrupted. It often happens. You just take your project directory, then delete - *.clw. Now load the project in visual studio and press Ctrl+W. It will take the class wizard.
Since the classWizard info is deleted, it will show a dialog and ask whether to regenerate it. Press yes and it will show a dialog to select source files. Add All your source files. I hope, now you can see your new dialog class in class wizard. 
Does this solves? or your problem is something else?
Regards,
Jijo.
_____________________________________________________
http://weseetips.com[ ^] Visual C++ tips and tricks. Updated daily.
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do not edit the code generated by wizard anytime
if you wish to use wizard always.
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Hello,
I made an application with a few classes developed by me.Then I made a dll for the classes which act as the base classes for developing my application.
But when I develop an application with this dll the application gives Unhandled Exception .If I develop an application using my base classes then the application is developed and works fine.
Is there something that must be missing while making the dll?
I went through the steps mentioned in a book for making the dll and the dll is been made.
Regards,
Pritha
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Did you try using your debugger ?
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prithaa wrote:
But when I develop an application with this dll the application gives Unhandled Exception .
Please provide the details of exception. if you press Ctrl+C in the Messagebox, the entire message will be copied to clipboard. FYI.
prithaa wrote: If I develop an application using my base classes then the application is developed and works fine.
Your class depends on MFC? did you forget to add AFX_MANAGE_STATE(AfxGetStaticModuleState( )); as the first line of all exported functions? Just possibilities. Provide more info, then only we help in isolating the issue.
regards,
Jijo.
_____________________________________________________
http://weseetips.com[ ^] Visual C++ tips and tricks. Updated daily.
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Hello,
Thanks
I have not mentioned this
AFX_MANAGE_STATE(AfxGetStaticModuleState.Where should I write this ?
While making the dll I have written AFX_EXT_CLASS in the declaration of the class.
I am getting the following Unhandled exception.
Unhandled exception in DllClient.exe(MFC42D.DLL):0xC0000005:Access Violation
Pritha
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prithaa wrote: I have not mentioned this
AFX_MANAGE_STATE(AfxGetStaticModuleState.Where should I write this ?
As the first line of all exported functions. See details here http://msdn.microsoft.com/en-us/library/ba9d5yh5(VS.80).aspx[^]and technical note here - http://msdn.microsoft.com/en-us/library/ft1t4bbc(VS.80).aspx[^]
I stress the point, it might be the reason since we don't have see the code. BTW, could you post the code snippet, which throws the exception?
prithaa wrote: While making the dll I have written AFX_EXT_CLASS in the declaration of the class.
AFX_EXT_CLASS is to make the class exportable. It expands to __declspec(dllexport).
Regards,
Jijo.
_____________________________________________________
http://weseetips.com[ ^] Visual C++ tips and tricks. Updated daily.
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AFX_MANAGE_STATE(AfxGetStaticModuleState is required if you are using resource templates. If you are not using resources i dont think its required.
please provide more details regarding classes you wish to export.
Also how are you using the dll in your new applications.
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Hello,
My application does not resources for user interface.I have a class derived from CMenu which initializes the menu of the application.
I get an error in the following.
CMenu* M = this;
int Count = M->GetMenuItemCount();
In my original program the count was 5 but with the dll I get 0 which means that there are no menu items in the 'this' menu .But there are.
Regards,
Pritha
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what is this pointer pointing to??
i mean is it a window or what??
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Hello,
The this pointer is
class Menu : public CMenu
{
}
The pointer is pointing to the Menu class.
Regards,
Pritha
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Hi all ,
i want to write a program , which can monitor a specific floder , if there was a file created in that specific floder, my program(i have to write) should get a notification.
How can i do this using VC++, or any better way to do this . please advise.
Thanks
Kanth.
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You can use FindFirstChangeNotification() and FindNextChangeNotification() apis for monitiring directory changes. For getting file creation notification, you've to provide dwNotifyFilter as FILE_NOTIFY_CHANGE_FILE_NAME. Note that it will include renaming, creating, or deleting a file name.
Check this sample about how to use it - http://msdn.microsoft.com/en-us/library/aa365261(VS.85).aspx[^]
Regards,
Jijo.
_____________________________________________________
http://weseetips.com[ ^] Visual C++ tips and tricks. Updated daily.
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Thank you soo much for your time for replying me. i will go thru the link
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