C / C++ / MFC

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Character map/Symbol picker Mauritz Bomark5-Apr-02 2:30 Mauritz Bomark 5-Apr-02 2:30  Hi Does anybody know where I can find a symbol/character picker (MFC/C++ source code) where you can choose font and character? I'm looking for something like the character map application (charmap.exe) in Windows. Any suggestion? Thanks in advance. /Mauritz FTP, filetime problem 5-Apr-02 2:06 5-Apr-02 2:06  Hi i'm writing a FTP-client using win32 functions. I need to compare the "ftLastWriteTime" of a file on a ftp server with a file on a local client without downloading the file from the server(s). I can use FtpFindFirstFile and FindFirstFile to retrieve this time. The problem is that FtpFindFirstFile returns the time by the local timezone. How can i convert this time to UTC(zone independent) format?? Thanks Fred CHTMLView and OnNewWindow2 Matt Gullett5-Apr-02 1:51 Matt Gullett 5-Apr-02 1:51  I have written a custom web browser for my company. I wrote it in MFC using the CHtmlView class. Everything is working well except: I handle the OnNewWindow2 method to popup a new window and I have everything working as far as popping up the window, showing/hiding the toolbar, menubar, status bar. The problem is I can't find a way to determine the appropriate size of the new window. The info is not passed in with the call and does not appear to be available through the interface. My best guess (from looking around) is that I need to create an event sink against the WebBrowser object itself and capture the settings there. I am not sure if this is the right approach and I am not quite sure how to go about doing this anyway. Does anyone have any suggestions? Thanks in Advance Matt Gullett Compliter error.... AsnowCn5-Apr-02 1:06 AsnowCn 5-Apr-02 1:06  i create a dialog based program,add some code to add tray icon,popup menu.but when i finished and complite it,1 error occoured. it said the the Dialog ID have been used and can't be overWrite.But where the place is Wizard create code, i never changed it.. so what caused it? Thanks a lot... Re: Compliter error.... Renjith Ramachandran5-Apr-02 8:11 Renjith Ramachandran 5-Apr-02 8:11  sometimes the resource ID wich u created newly is the same as the Dialog Resources ID...jusk look in to the resource file and look up on the Dialods ID..and look on the code u added newly..and change if there any..that will work..try it now..!!! Hai Friends me from Pandalam..and i think there is a sofware behind everything... so enjoy with the codes... STL set compare headache _Magnus_5-Apr-02 0:49 _Magnus_ 5-Apr-02 0:49  Im trying to use a set of _bstr_t with a custom compare func. The compare func is defined as this struct _bstr_t_cmp_fn : public std::less<_bstr_t> { bool operator ()(const _bstr_t &r1, const _bstr_t &r2) { return (stricmp(r1, r2) < 0) ? true : false; } }; i then use it like this std::set<_bstr_t, _bstr_t_cmp_fn> oPaths; which works fine, insert seem to work the way it should to, but then i want to use the set::find() function. I defined the iterator like this, no problem std::set<_bstr_t, _bstr_t_cmp_fn>::iterator it; but when i then try this it = oRefs.find(e); // ( e == _bstr_t object ) i get compiler errors error C2662: '()' : cannot convert 'this' pointer from 'const struct _bstr_t_cmp_fn' to 'struct _bstr_t_cmp_fn &' Why is that?? ...it gives me a headache.. /Magnus Re: STL set compare headache Dominik Reichl5-Apr-02 0:58 Dominik Reichl 5-Apr-02 0:58  Hmmm... perhaps it = oRefs.find(&e); works? Re: STL set compare headache _Magnus_5-Apr-02 0:56 _Magnus_ 5-Apr-02 0:56  No does not work, get another error which is what i should get since the set contains _bstr_t and not _bstr_t *. /Magnus Re: STL set compare headache Dominik Reichl5-Apr-02 1:07 Dominik Reichl 5-Apr-02 1:07  And when you simply remove the &s in the bool operator ()(const _bstr_t &r1, const _bstr_t &r2) declaration? Re: STL set compare headache _Magnus_5-Apr-02 1:02 _Magnus_ 5-Apr-02 1:02  nevermind, the () operator have to be bool operator ()(const _bstr_t &r1, const _bstr_t &r2) const Really crappy error msg i think.....but thats STL it seems /Magnus Re: STL set compare headache Michael Dunn5-Apr-02 16:32 Michael Dunn 5-Apr-02 16:32  You have another bug in that stricmp() is the wrong function to use. BSTRs are Unicode strings, you need to use _wcsicmp(). --Mike-- "Jobs that don't allow you to visit the Lounge 25 times a day at the minimum are not worth having anyway."   -- Nish, 3/28/2002 My really out-of-date homepage Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan and Jamie Salé. Re: STL set compare headache _Magnus_7-Apr-02 22:19 _Magnus_ 7-Apr-02 22:19  I store _bstr_t not BSTR and _bstr_t have a (char *) operator so it should work just fine. (maybe not the most efficient way) /Magnus copying strings in managed code Ignacio Varas4-Apr-02 23:42 Ignacio Varas 4-Apr-02 23:42  hi, My question could be a stupid question, but i don't find the solution. It's simple I have a managed function like that: bool GetValorBinary(LONG lVarId, String & pCadena, int length) - inside code i create a new String, where pcadena2 is a TCHAR. String * prue(pcadena2); - now i want to do something like to back the value in pCadena pCadena=pcadena2; - but at build i recived the next error: error C2582: 'operator =' function is unavailable in 'System::String' Any suggestion? thanks in advance. Salamanca 2002 Capital Cultural Europea, Visitala Re: copying strings in managed code Dominik Reichl5-Apr-02 0:49 Dominik Reichl 5-Apr-02 0:49  Perhaps strcpy(pCadena, pcadena2); helps? Re: copying strings in managed code Ignacio Varas5-Apr-02 2:10 Ignacio Varas 5-Apr-02 2:10  thanks, but not, it doesn't work, i had try yet. anymore ideas? Salamanca 2002 Capital Cultural Europea, Visitala Re: copying strings in managed code Renjith Ramachandran5-Apr-02 7:21 Renjith Ramachandran 5-Apr-02 7:21  This structure is not a true C-language structure because it contains variable-length members. This structure was created solely to depict the organization of data in a version resource and does not appear in any of the header files shipped with the Microsoft Platform Software Development Kit (SDK). Hai Friends me from Pandalam..and i think there is a sofware behind everything... so enjoy with the codes... Re: copying strings in managed code Le centriste5-Apr-02 7:32 Le centriste 5-Apr-02 7:32  First of, are you sure that: String *pru(pcadena2); works? In the System::String class, there is a Copy() function that would do what you want. Michel If I am wrong or said something stupid, I apologize in advance Re: copying strings in managed code Ignacio Varas7-Apr-02 23:18 Ignacio Varas 7-Apr-02 23:18  hi, Yes i'm sure. that's works, but Copy() fuction doesn't works, doesn't generate any errors but not copy the string. Salamanca 2002 Capital Cultural Europea, Visitala Encryption...? alex.barylski4-Apr-02 23:38 alex.barylski 4-Apr-02 23:38  Just curious...it seem most encryption (ciphers...?) use 128, 192 and 256 bit encryption strength. What i'd like to know is why stop there...? Why not make your encryption 134217728bit strength...this would take a millenia on even a cray super computer, which would be pretty hard to beat...Is it because of time required to encrypt/decrypt...? Or is it an actual limitation on the size of data the ciphers can accept...? Just curious... Thanx! "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: Encryption...? moliate5-Apr-02 0:22 moliate 5-Apr-02 0:22  There are legal limitations. You can see how they look in your country here. /moliate Re: Encryption...? alex.barylski6-Apr-02 1:12 alex.barylski 6-Apr-02 1:12  Seriously...? Thats the only reason why...that sux... "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: Encryption...? moliate7-Apr-02 1:25 moliate 7-Apr-02 1:25  Not the only reason... Different methods act differently on a longer key. Some might take considerable time to encrypy/decrypt. Others might not benefit at all. Take the simplest kind of crypto for example - the Ceasar crypto. This means shifting characters a specified number of places in the alphabeth, like "hello" -> C(2) -> "ignnq". There would be no benefit if you shifted 3 or 1188139 places (1188139%26 = 3). Many more complex cryptos act like this... /moliate Re: Encryption...? Jon Hulatt5-Apr-02 5:48 Jon Hulatt 5-Apr-02 5:48  It is largely encrypt/decrypt time. Even with something like a 512 bit key, an RSA style cipher is slow. This is qhy PGP was created... it's a quick hack... PGP uses an encryption algorithm called IDEA. it's not a public key algorithm, and therefore the single encrypt/decrypt key must be sent with the message. The traits of IDEA are such that it is secure provided the key is kept secret. IDEA is much quicker to compute than RSA. PGP generates an IDEA key dynamically, and encrypts the message with that. It then uses RSA to encrypt the IDEA key, and that is sent along with the IDEA-encrypted body. This way, you get a Pretty Good security implementation that is relatively quick to process. One of the less obvious problems is time taken to generate prime numbers for use in long key lengths. Generating prime numbers is one of the most computationally expensive things you can do. Also, key length being binary, the relative difficulty to break a key is based on 2 raised to the power of the key length. Therefore, if a 64 bit key could be broken by brute force in 24 hours, a 65 bit key would theoretically take 48 hours. Things get somewhat exponential. The encryption key length used for various applications is based on expense of using that key (processing power required to make solution easy to use) weighed up against the consequence of the information getting out. Sorry to dissapoint you all with my lack of a witty or poignant signature. Re: Encryption...? alex.barylski6-Apr-02 1:19 alex.barylski 6-Apr-02 1:19  It is a matter of speed also... I had an idea that at first seemed great, but later noticed a serious flaw...in that 128 bit encryption actually only encrypts at (i think) half the strength, maybe less. The algorithm would have been fast encrypting/decrypting because it was basically bit shifting, but in a much fancier way than normal. Only generating a key would have been tricky if not impossible...because the implementation required each char in the key to be unique... Nonetheless...it was only a semi-failed attempt...I did leanr quite a bit about encryption. Anyways...thanx Jon "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr TransparentBlt error... Rickard Andersson204-Apr-02 23:11 Rickard Andersson20 4-Apr-02 23:11  Okay, TransparentBlt is an unresolved external symbol!! Do I have to include a specific .LIB????? ------------------------------------ Rickard Andersson, Suza Computing ICQ#: 50302279 I'm from the winter country SWEDEN! ------------------------------------

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