|
You'll need to derived your own class from CEdit, and override OnChar()to only accept numbers.
|
|
|
|
|
One solution is to add an onchange message handler and update the edit control accordingly based on its current content.
Kuphryn
|
|
|
|
|
If you only want positive integers, then set the ES_NUMBER style, causing the control to reject everything except digits.
Hope this helps,
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"
|
|
|
|
|
Is there a protocol issue when Serializing data using Serialize method of MFC C++ over a TCP Socket to a Java App. If not how can this be done?
The model is: A java client connect a server written in C++ and Serialization of a Class or an Object containg data takes place. If you can help me I'll be very happy.
Cheers
Sean V
|
|
|
|
|
Hello, I'd appreciate any help.
Over the last two days I've been experiencing my source code files going missing, while I'm working on a project in the IDE.
I'm using Visual C++ 6with SourceSafe. I don't have SourceSafe Client running, but frequently, while developing in the IDE, when I double-click on a file in the Project Explorer to open it(always an implentation file) I get 'Project file .. does not exists. Do you want to get it from Source control?'
For some strange reason it's just disappeared from my hard -drive. I can restore it from SourceSafe but I've lost of the work I've done since I last checked in.
I always save my files regulary. Can anybody tell me if VC++ keeps temporary copies of files while I'm working on them so I can try to restore something.
|
|
|
|
|
The most common reason of *.h or *.cpp mystically disappearing is the "Norton anti-virus + Windows2000/XP" combo, it deletes your source files permanently from time to time when you are using class-wizard. And no, there is no way to solve this problem even if you tell Norton to ignore *.h and *.cpp.
Either Microsoft or Symantic MUST fix this, but so far neither of them did. The best solution at this moment is completely stay away from Norton anti-virus if you are working on Windows2000/XP.
|
|
|
|
|
Thanks! That is scary. Could be it, although I've been using the win2000/Norton Antivirus/Visual C++ combo for 3 years now. But I will shutit down now.
|
|
|
|
|
Hi,
Does anyone use a garbage collector in their MFC programs? If no, why not? Anyone with positive or negative experiences? What collector did you use? Thanks.
|
|
|
|
|
Nope. I don't like garbage collector, 'cause I prefer to manage myself the memory I allocate.
We do not inherit the Earth from our ancestors, we borrow it from our children - Antoine de Saint-Exupéry (1900-1944)
|
|
|
|
|
Based on my experience on VC.Net. If I were to use GC in my code.
I will need to wait for the GC to destruct (which is somehow unpredictable unless you write code to explicitly calling the GC). The C++ destructor will just destruct it when it exit the scope.
My code is neater and I know when I exit the scope, everything should be taken care of in the destructor like it will dellocate the pointer and server connection (if i were to place it in destructor) for me so that I have free memory and reusable resources.
This is not the case for using GC. You simply can't tell when is it ready for next operation.
Hope this is useful.
|
|
|
|
|
Hi all,
I am using the default property sheet of the MMC interface.
my question is how to change the property sheet title?
i only implement this method:
STDMETHODIMP CMyNode::CreatePropertyPages(LPPROPERTYSHEETCALLBACK lpProvider,long handle, IUnknown* pUnk, DATA_OBJECT_TYPES type)
{
if (type == CCT_SCOPE || type == CCT_RESULT)
{
HRESULT hr;
CPage1* pPage1 = new CPage1();
hr = lpProvider->AddPage(pPage1->Create());
ATLASSERT(SUCCEEDED(hr));
return S_OK;
}
}
it works ok, i see my page within the property but the title the property gets is the same title is CMyNode....how do i change this default???
thanks in advanced
Yaron
Ask not what your application can do for you,
Ask what you can do for your application
|
|
|
|
|
Hi,
is there any way how to get around the limit of maximum 64 characters of text in tray icon hint? I know that NOTIFYICONDATA has only 64 byte array, but what about displaying some other tooltip instead of regular tray icon hint that would support longer text?
Thank you for any suggestion.
|
|
|
|
|
no 'real' chance...
try to use an own tooltip window!
Don't try it, just do it! 
|
|
|
|
|
Hi..
I made a VB6 DLL FileDownload.NetDown
Now I use this VC++ code to check if the component is registered
LPCLSID cls=0;<br />
HRESULT hr=0;<br />
hr=CLSIDFromProgID((LPCOLESTR)"FileDownload.NetDown",cls);<br />
<br />
if(hr==S_OK)<br />
AfxMessageBox(cls->Data1);<br />
else if(hr==CO_E_CLASSSTRING)<br />
AfxMessageBox("Bad ProgID");<br />
else if(hr==REGDB_E_WRITEREGDB)<br />
AfxMessageBox("Error");<br />
else AfxMessageBox("NONE");
I get the Message (NONE) !!!
I don't Get the Class ID or even an error .. How comes ?
NOTE:
I checked with regedit and the ProgID , ClsID Exist !!
|
|
|
|
|
If you actually check the value of hr, you'll probably find it's E_POINTER (0x80004003), because you're passing a NULL pointer.
You're trying to get CLSIDFromProgID to write into location 0.
The following may work rather better:
CLSID cls = { 0 };
HRESULT hr =
CLSIDFromProgID( OLESTR( "FileDownload.NetDown" ), &cls );
CString sMessage;
if ( SUCCEEDED( hr ) )
{
sMessage.Format( _T( "CLSID(1): 0x%08x" ), cls.Data1 );
}
else
{
sMessage.Format( _T( "ERROR: 0x%08x" ), hr );
}
AfxMessageBox( sMessage );Key things to learn:- A pointer must point to some allocated space.
LPOLESTR is always a pointer to a Unicode string. Use the OLESTR macro to portably produce a compatible string.HRESULTs can be either success or failure - there are multiple success codes and multiple failure codes. To generically test for success or failure, use the SUCCEEDED and FAILED macros.- The documentation only lists common error codes, it does not show all possible error codes.
Hope this helps.
|
|
|
|
|
 Hi! I'm writing an AV player app. So far it works fine on playing single files. However, when I create a 'playlist' and then try to loop through playing each file in turn, files open and load, but then do not play until the last in the list!! The routine runs along the lines of:
for(x=0;x
|
|
|
|
|
It's because you're running this in a loop.. it doesn't wait for the song to play/end, it starts playing the song then goes to the top of the loop and starts all over again until it gets to the last item in the loop.. you need have the loop wait until the song ends or even better yet in your timer function wait until the song ends.. then if another song exists in the playlist start it.
Rob
Whoever said nothing's impossible never tried slamming a revolving door!
|
|
|
|
|
Hi,
I want to read version number and company name from RC File at run time.
How can i do this ?
Thanks in advance
|
|
|
|
|
If you mean "read version information from the resources of a module at runtime",
then you can use GetFileVersionInfo (...). You can even use it on the calling
module by using GetModuleFilename to get the path to use.
There is even an article "ShowVer.exe command-line VERSIONINFO display program"[^]
with example code.
If you really mean from an .RC file, then just read it as text and parse
it.
|
|
|
|
|
another way is to load the resource section by calling findresource and loadresource.
Don't try it, just do it!
|
|
|
|
|
I am writing a software, it needs hide itself and capture a snapshot of the screen. It works well normally, but when system is busy, sometimes, the window of my program has not been hiden or the background has not been repainted but my program does not know that, the snapshot is taken even the screen is not updated yet.
I just use
ShowWindow(hwnd, SW_HIDE);
UpdateWindow(hwnd);
to hide my window. But I don't know when Windows will repaint the screen, how to wait until the background covered by my program is repainted by Windows?
|
|
|
|
|
Hi Daniel,
your problem is, that the paint-function from windows are message-oriented. The hiding of your window take a WM_PAINT message in the message-queue from all other windows which are behind your window. That is the problem, you don't know when all the other windows processes the WM_PAINT message.
My two solutions:
1) bad but simple, let "sleep" your application after ShowWindow() for some milliseconds, e.g. Sleep(100)
2) Write a global Keyboard-Hook (like other programs which takes a snapshot).
Regards
Frank
|
|
|
|
|
I'm looking for a way to save data in the Windows BMP format. The code should run on Unix platforms, too, so API functions are not applicable.
If a train station is where the train stops, what's a workstation...?
|
|
|
|
|
Bitmap format is pretty simple. You will need to define all structures (BITMAPFILEINFO, BITMAPINFO, etc.), then just fill them right and save to disk. Look up for more information on structures in MSDN[^]
Philip Patrick
Web-site: www.stpworks.com
"Two beer or not two beer?" Shakesbeer
|
|
|
|
|
Hi to all,
I need sources for programming external devices, actually I have to make a program to control electronic circuit boards... I collect some info from the net and I think it is easier to reach circuit boards with serial ports. Finally I guess there are some resources out there and if someone post these, I really will be gratefull to him/her...
Thanx in advance.
Not: I need these resources for our project (to add real physics to our robot project in school)...
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
