Latest notes, articles, and news
The following Chilkat FTP2 error was found by a Chilkat customer to be caused by firewall restrictions. I do not know the specifics of the firewall restrictions that caused the error, but the LastErrorText (with all customer information removed) is reproduced here to help identify this problem in the future. The important point is to see that the SSL/TLS handshake […]
Question: I have added HTML email file support (thanks to your excellent examples and library), but I have a question. It appears that it might be easier for the end user to save their things they want to email as a MHT file instead of HTML out of MS-Word. That way they have one file to deal with. So is […]
The correct way to pass a string to a COM/ActiveX method is to use “WideString (theString).c_bstr()” because ActiveX controls/components require BSTR’s, and not strings. BSTR’s are wide strings (Unicode) where the length of the string precedes the string in memory. The C++ Builder code to pass a string to an ActiveX function is as follows: FClientSock = new TChilkatSocket(Owner); success […]
Question: “I’ve got the Chilkat C++ libs linked with my project, and am using the HTTP classes successfully. One thing is confusing me, though. I’ve derived a class from CkHttpProgress.h and overridden AbortCheck(…) to provide cancellation support. However, AbortCheck(…) never gets called. At first, I thought perhaps the HTTP retrieval was occurring too quickly, so I set the “HeartbeatMs” property to “1”, and it […]
A link to a Chilkat blog post within information about ActiveX DLL deployment: http://www.chilkatsoft.com/p/p_395.asp
Question: I have now tried to register the component manually, but then I get his message: “The module c:\…\ChilkatDotNet2.dll was loaded but the entry-point DllRegisterServer was not found. Make sure that c:\…\ChilkatDotNet2.dll is a valid DLL or OCX file and try again.” Answer: A .NET assembly is not an ActiveX component. It is not registered with regsvr32. If your application […]
Question: I was wondering how it would be possible to make changes to an email on the server. Answer: Once an email is on a server, it cannot be modified. This is not a Chilkat limitation, but it’s the way mail servers work. However, with IMAP you may download an email, make changes, upload the new email to the mailbox […]
If you’re just starting to program with TCP connected sockets using the Chilkat Socket API, then these concepts should be understood before beginning. 1. Receiving Data from a Connected Socket. The ReceiveBytes and ReceiveString methods will return whatever data has already arrived and is available on the connected socket. It is not guaranteed to return the complete amount of data […]
Question: I recently purchased the Chilkat HTTP component and am using it with a Visual FoxPro application. However, each time I run it the form freezes and I get the Not Responding message in the title bar. I have an animated GIF that I am using as a quasi-progress meter but that freezes as well. As soon as the HTTP […]
Question: A quickie question about the FTP2 control. I have some clients with strange FTP servers that return the directory listings in formats that no control seems to be able to handle (although I have not tried yours!). However, it is next to impossible to test, since I do not have access to their server. For them, we use the […]