Open workspace by VC6 IDE, RC is not loaded and RCF and RCF are display as a file name in workspace but empty，why？how should I do for doing this work well。
Change macro definition as below,result is same
What are you trying to achieve by doing this? ...I don't remember having to edit this file directly ever, you should be able to make any changes regarding project files and compilation changes from the IDE.
It will be sent to the parent window (in your case the dialog) just before the button is painted. So handle it in your dialog's DlgProc function by creating a brush in the background color that you want, casting it to BOOL and returning it. See MSDN for details.
The MainFrame is showing and the user click the logout button to call login function. The the CLoginForm show, CLoginForm is a no border CDialog, when user click the minimize button of CLoginForm. The CLoginForm is hide, but there is a black block in the left-bottom of the screem. I donot know why this happen.
My guess is that login being a modal dialog will prevent the parent window from processing things (like paint messages) until the modal dialog is dismissed. Might you use a modeless dialog in this case?
In c language you can check wether the language is in lower case or upper case by using their ASCII value.
ie, for "A" ASCII value is 65. for "a" ASCII is 97. by directly checking this condition you can ensure character is small letter or capital letter.
to convert you can use
I am working on a project in which we can capture a video, save it in avi format. We are using Microsoft Directx for the same.
Now I want to increase the quality of the video similar to the HD mode. Is It possible using C++/VC++/MFC.?
Is it possible that we can capture a video with high quality or after capturing/saving the video, play the same in HD mode.?
Please let me know if the above discussion is ambiguous.
To convert wide strings to char or multi-byte without loss of information, the wide string must only contain characters from a specific known character set / code page.
When using the wcstombs() conversion function, you must first set the locale to those used by the input string and restore it after conversion (see setlocale()[^]). The default locale is 'C' which is not language specific (English).
If the code page of the input string is the same as for the current thread, you can use conversions provided by the CStringT class. This should do the job in most cases:
// Create a char/multi-byte string from wide string.// Pass LPCSTR to constructor, so use casting or GetString()!
// Convert it back to a wide string
Thanks for your reply. I am able to convert successfully using WideCharToMultiByte function. But I am facing the same problem when I use CStringA strA(str.GetStrng()) for conversion, even when I use SetLocale() function. Can you please help me out in this.
Sorry for my late answer. I overlooked your reply.
The CStringT class constructors and assignment operators accepting the LPCSTR and LPCWSTR types will convert the string if it does not match (when assigning LPCWSTR to a CStringA object it is converted to ANSI and when assigning LPCSTR to a CStringW object it is converted to Unicode). The conversion is internally performed using WideCharToMultiByte() and MultiByteToWideChar() with code page CP_THREAD_ACP (when using Visual Studio 2003 and later; with older versions or manually set preprocessor definition _CONVERSION_DONT_USE_THREAD_LOCALE, CP_ACP is used). See the ATL/MFC source files cstringt.h and atlconv.h if you are interested in how the conversions are performed.
If you are not calling SetThreadLocale() within your app, the thread will use the system locale.
If the results from using WideCharToMultiByte() and CStringT constructors are different, you have passed a code page number that differs from the default code page of the used locale.
So you may post your settings here or check it yourself:
The code page passed to WideCharToMultiByte()
The code page used by the CStringT class
To get the code page used by the CStringT class use this code snippet (assuming CP_THREAD_ACP is used):
// Default ANSI code pageint nCP = ::GetACP();
// Returns same as GetSystemDefaultLCID() when SetThreadLocale() has not been called.
LCID nLCID = ::GetThreadLocale();
if (::GetLocaleInfo(nLCID, LOCALE_IDEFAULTANSICODEPAGE, szACP, 7) != 0)
nCP = _tstoi(szACP);
Now compare nCP with the value passed to WideCharToMultiByte().
All these different locales and code pages may be confusing. So I will sum up the settings that may effect your conversions:
The system locale including its default ANSI code page
The user's locale including its default ANSI code page
The thread's locale including its default ANSI code page
The code page used by the CStringT class
The code page passed to conversion functions in your code
This program must accept as input from the user a value between 0 and 255 to be used as the
secret key, the name of the input file and the name of the output file. No line in the input file
should contain more than 4096 characters.
After the user would have provided their secret key, this program should read and perform an
XOR cipher on the contents of the input file and write the result to the output file.
If the input file has already been encrypted and the identical secret key that was used to
perform the initial encryption is provided, then the contents of the output file should be
deciphered into its original plain text.
can you please provide me with the algorithm on how to go about doing this work.
This is a fairly obvious homework question so you should at least make an effort to do the work yourself. If you do not understand how to apply XOR to a string of characters then you should read this page[^]. Similarly, reading and writing files is a basic part of the language that can be learned by reading these pages[^].
One of these days I'm going to think of a really clever signature.
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