What is your goal? For cross platform, Qt is probably the most dominant library. For just Windows, .NET is the most dominant, though the actual UI jumps around (forms, XAML, Silverlight, etc.) I personally love C++ and MFC and write small apps in both because I'm an expert in both (and will hopefully retire soon with that being my legacy of expertise.) However, if you are starting out, unless you are specifically interested in embedded systems, driver or kernel level code, C++ is a poor choice. Based on my recent interview experiences, Java probably has more demand than any language (Android is a big part of this) with C#/.NET web services being a close second. I have found increased interest in Qt, though I'm not convinced the demand will last much more than another decade, if that. (On the flip side, iPhone apps are written in Objective-C. How long will that last? Who knows?)

Export function from exe and import in dll. Below example is taken from http://www.codeguru.com/cpp/w-p/dll/article.php/c3649 In the EXE: // Do exactly as you would export a DLL... extern "C" { EXPORT void ExeFn(char * lpszMessage) { MessageBox(NULL,lpszMessage,"From Exe",MB_OK); } } In the DLL: ... // Get the handle of the EXE that loaded us. FnPtrT FnPtr = (FnPtrT)::GetProcAddress(GetModuleHandle(NULL), "ExeFn"); if(FnPtr) (*FnPtr)("Message From The DLL"); else MessageBox(NULL,"It Did Not work :(","From DLL",MB_OK); ...

It doesn't have to be in the same file, you just have to include both in your DLL project. As far as the source requiring to be disclosed.... well, don't pass an entire class to your DLL and you won't have to disclose the code. You should probably only pass data along. Make use of data structures instead of passing classes.

.tlh files are generated by the compiler when it encounters a #import directive. The exact behaviour of what the compiler does depends on the options to that directive. The compiler has a COM support library which already supplies smart pointers, so use of ATL's CComPtr is unnecessary. See the definitions of _com_ptr_t. If you don't want the compiler to generate smart pointer wrappers, specify no_smart_pointers in the #import directive. I would generally try to avoid reusing the .tlh file from a previous compilation session, particularly when moving between compilers. The underlying compiler support classes may have changed. That's probably what's happened here. DoEvents: Generating unexpected recursion since 1991

Thnks for help. I've got several interesting libraries that I am pleased to share with you. Here are the links. But for the moment I do not know which is the best. http://www.codeproject.com/KB/library/LiteZip.aspx http://www.codeproject.com/KB/cpp/xzipunzip.aspx http://www.winimage.com/zLibDll/ http://www.info-zip.org/UnZip.html http://www.7-zip.org/ http://www.bzip.org/

I think you may be misunderstanding what these functions are for. They are not for flow control in function calls.  They are for exiting a process (i.e. a running application). Simple error codes returned from your functions will allow the caller to take the appropriate action based on the value it gets back from a called function. Mark Mark Salsbery Microsoft MVP - Visual C++ :java:

You're welcome! I hope I could help. The only real slowdown I've noticed is when starting mixed-mode apps in the debugger :) Cheers! Mark "Go that way, really fast. If something gets in your way, turn."

Arris7 wrote: Does Invoke mean that I will be able to call the function on runtime by typing in its name and parameters from an edit control? Yes, if you already have a IDispatch pointer to an object which implements the functions you want to call, then you can first call GetIdsOfNames to get the DISPID of the function, then use Invoke to call a function with a given DISPID. This is how it is done the hard way (pure C++), but you could also use scripting mechanics which take care of all this. One article which talks about similar things is this one: http://www.codeproject.com/com/scripter.asp[^], you can surely find other similar. Hope this helps, Daníel Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

Sure, you could use a map. If there was only a few possibilities you could even use if/else if/else if you wanted to :) Mark "Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Looks good. I would expect to be picking up a large Open Source code base with this approach which might be a lot of work to bring up to whatever standards your shop requires. If this isn't a problem then it looks like you might have yourself a cool solution. I might even have a peek at some of it myself. I had to implement syntax colouring in an RTF based editor a few years ago and it was extremely difficult with very few code samples at the time. It woudl be interesting to see how it's supposed to work :-D Nothing is exactly what it seems but everything with seems can be unpicked.

Why delete your question? WhiteSky

Ok I've been digging through the source code. I'm on MFC 7.1 (VS2003) I'm not sure how this compiles since there's no insertion/extraction operators that take a CString: CString str; CString str1 = "Root"; ... ar << str1; ... ar >> str; The only way I see to write and read a CString is: CString str; CString str1 = "Root"; ... ar.WriteString( (LPCTSTR)str1 ); ar << _T('\n'); ... ar.ReadString( str ); FWIW I hated this about CArchive. I use my own CArchive-derived class which writes strings using a lead WORD for the string length. I thought it was silly when you want your load/store code to match 1-to-1 but you have to add an extra line when storing a string to write a newline :rolleyes: Mark "Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Arris7 wrote: So converting to string + parsing data + reconverting again to int will probably be expensive in term of execution speed I don't know. Maybe it depends on what you are exactly doing... :-D If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.

I'd say you need to implement some kind of clipping so you're not drawing the whole bitmap each time, just the portion which is visible. How are you displaying your bitmap? BitBlt? - S 50 cups of coffee and you know it's on!

You haven't called the [] operator for the template class in either of your examples. Instead of theInt.Date[0] =5; // This is using default [] operator to index into the "Date" member. it should be theInt[0] = 5; This will call your operator but it won't compile since you have no "at()" method defined. Mark "Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Arris7 wrote: Any idea of how to do it? _variant_t var(_T("hello")); CW2A ansiBuffer((_bstr_t)var); cout << ansiBuffer << endl; led mike

thanks, Yes dates are in order. the method you suggest is a binary search. I think it is the best solution for my problem.