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Re: Passing hWnd to an ActiveX control bobby13-Sep-01 12:46 bobby 13-Sep-01 12:46  Thanks again .. I know it sounds wierd that an ActiveX control hooking to a WndProc of a container but it is kinda needed since when the control is downloaded then it will help me to analyze some data. I tried the function that takes OLE_HANDLE and casting it appropriately but didnt work. I will give it a shot with LONG. The other solution u mentioned is through ATL COM(in which I dont have my hands dirty)..is it possible through just MFC. Thanks a mucho.. Bobby Calling a function callback on a specific known thread tonyschr13-Sep-01 10:57 tonyschr 13-Sep-01 10:57  I'm creating a synchronized queue where callers can register to have a function called after a specified timeout (or after the previous one has finished, whichever comes last). Everything works great, but I would like to extend this so that any thread can queue up items, and the callback is guaranteed to be executed on that thread. Ideally, a function like SetTimerOnThread(DWORD dwThreadID, TIMERPROC lpTimerFunc) is what I'm looking for. SetTimer() will call back on the originating thread, but the problem is that after it returns from the callback I need to set the timer for the next workitem, which may have been queued up from a different thread. Posting messages to various windows would help, but might get hairy. I'm trying to build this so that it doesn't depend on a windprocs having direct knowledge of the queue, or the queue having direct knowledge of windows. Another potential solution is to CoMarshalInterThreadInterfaceInStream the item when it enters the queue, and unmarshal just prior to executing it. The marshalling should take care of making sure everything happens on the right thread. I don't particularly like this solution though. It's overkill and the queue doesn't currently use COM. Any suggestions? --CoolDev Re: Calling a function callback on a specific known thread Tomasz Sowinski14-Sep-01 0:07 Tomasz Sowinski 14-Sep-01 0:07  the callback is guaranteed to be executed on that thread Wow, that's quite impressive requirement. What should happen if that thread is busy? Seems that you'll need some cooperation from the thread you want your callback to be executed on - for example, waiting for Win32 event when there's no work to do. When the event is in signaled state, thread picks up callback address from the queue and jumps into it. Tomasz Sowinski -- http://www.shooltz.com Re: Calling a function callback on a specific known thread tonyschr14-Sep-01 7:52 tonyschr 14-Sep-01 7:52  The idea is that it's on a timer, so it happens whenever the thread gets around to handling the message. (I'm not trying to do something like QueueUserAPC() without expecting the thread to be in a waitable state!) This requires that all threads using the queue have a message pump, but that will always be the case for this application. If you do away with encapsulation and let a WndProc on each thread know about the queue, and have the queue store a handle to a window on each thread, than it would just be a matter of posting a message to the window once the timer has elapsed. If MSDN didn't explicitly disallow it I could pass an HWND who's message pump lives on another thread to SetTimer() with the expectation that it would post a WM_TIMER message to that window after the timeout. If params I sent to SetTimer() included a callback then it could call the callback without having to handle WM_TIMER in each WndProc. --CoolDev Re: Calling a function callback on a specific known thread Tomasz Sowinski14-Sep-01 8:40 Tomasz Sowinski 14-Sep-01 8:40  I think you should use PostThreadMessage and place the call to message handling code inside the thread's message loop, since messages posted with PostThreadMessage have hwnd == NULL. Tomasz Sowinski -- http://www.shooltz.com "Playing time" of a sound and video file? JCY13-Sep-01 10:01 JCY 13-Sep-01 10:01  Hi.. Just wanna ask??? How do u determine how long a sound or a video file is played? Is there some form of command that VC++ has that would allow me to input a file name and it automatically gives me an approximate playing time of the sound or video file? Thanks in advance.... Re: "Playing time" of a sound and video file? A.R.13-Sep-01 12:12 A.R. 13-Sep-01 12:12  You can do it through DirectShow. There is one interface (sorry I can't remember the name at this time, but you can find it very easily in the DirectX SDK documentation) that you can query through the IFilterGraph interface, and use the methods to get the time of the media file. Re: "Playing time" of a sound and video file? Christian Graus13-Sep-01 12:21 Christian Graus 13-Sep-01 12:21  Cool - I was hoping someone would answer this question. Looks like my weekend has been plotted out - I am working on a database for media files and this was my next problem. Thanks Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. How do get a child dialogs handle? 13-Sep-01 9:31 13-Sep-01 9:31  I would like to use the CMyTabCtrl class for Tabs. I put a tab control on my dialog and implemented the code. The problem is that the buttons I have put on the tab have local message maps. I would like for them to call functions on my main dialog. I can not get the handle so that I can call class functions there. Help? Re: How do get a child dialogs handle? Paolo Messina13-Sep-01 12:10 Paolo Messina 13-Sep-01 12:10  Sample function: CMyTabCtrl::MyFunction() { CMyDialog *pDlg = (CMyDialog*)GetParent(); pDlg->TheOtherFunction(); ... } Do that only if the dialog is the parent window and it is of class CMyDialog. Cheers, Paolo ------ "airplane is cool, but space shuttle is even better" (J. Kaczorowski) Re: How do get a child dialogs handle? Michael Flood14-Sep-01 4:15 Michael Flood 14-Sep-01 4:15  Duh! This is what I get for not doing any windows programming for about a year. will not let that happen again. I think my problem was that I was casting as a CDialog instead of the derived class that includes all of my functions. Thanks Paolo. Sometimes to catch mice, you have to act like cheese... Resources do not always recompile Todd Smith13-Sep-01 7:52 Todd Smith 13-Sep-01 7:52  Sometimes when I edit a resource in a project and then do a build it doesn't seem to recompile the resources. I'm using some includes and defines to conditionally include external resources files. Is there a way to setup a VC project so that compliling the main rc file will depend on these external files? Re: Resources do not always recompile Tomasz Sowinski13-Sep-01 8:51 Tomasz Sowinski 13-Sep-01 8:51  When you open the properties for your .rc, what's displayed at 'Dependencies' tab? Are these external files listed there? Tomasz Sowinski -- http://www.shooltz.com Re: Resources do not always recompile Todd Smith13-Sep-01 11:11 Todd Smith 13-Sep-01 11:11  There are some externaly listed .rc files yes. And those external .rc files also contain links to files such as .ico, .bmp, and .txt which are compiled as resources. Re: Resources do not always recompile Tomasz Sowinski13-Sep-01 23:49 Tomasz Sowinski 13-Sep-01 23:49  Any chance of adding references of these .ico, .bmp and other files to your project? Tomasz Sowinski -- http://www.shooltz.com Parsing URLS in C++ 13-Sep-01 7:26 13-Sep-01 7:26  I am developing an ISAPI extension in C++. My project uses many HTML forms with text input boxes. When the forms are submitted (using "GET") I am parsing the values from the browser URL. This works nicely but the strings have escape characters (+ instead of space etc). Is there a better way to process the form information so that there are no escape characters, or does anyone know of a function/code that replaces the escape characters? Thanks Re: Parsing URLS in C++ Nemanja Trifunovic13-Sep-01 7:33 Nemanja Trifunovic 13-Sep-01 7:33  Actually, it's pretty easy to write a function that replaces escape characters and vice-versa. Escape characters are pretty good thing, and moreover, it is the standard. I vote pro drink Re: Parsing URLS in C++ Erik Thompson13-Sep-01 7:40 Erik Thompson 13-Sep-01 7:40  You should really look at ATL Server in that is coming out with VS.NET. It will make ISAPI Extension development much easier and more flexible. The urls and all the data submitted is very easily accessible. Cheers, -Erik ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ My thoughts are my own and reflect on no other. Re: Parsing URLS in C++ Jon Sagara13-Sep-01 8:26 Jon Sagara 13-Sep-01 8:26  Look up the InternetCrackUrl() function in MSDN. Jon Sagara Sagara Software Re: Parsing URLS in C++ Todd Smith13-Sep-01 8:50 Todd Smith 13-Sep-01 8:50  Search the web for URL Encode and URL Decode. You should find something on sourceforge.com also. Re: Parsing URLS in C++ Anders Molin13-Sep-01 9:21 Anders Molin 13-Sep-01 9:21  Take a look at the InternetCanonicalizeUrl() function. It both encodes and decodes URL's. - Anders Money talks, but all mine ever says is "Goodbye!" Re: Parsing URLS in C++ 20-Nov-01 8:47 20-Nov-01 8:47  You may want to use a C++ web application server, such as Lightning server, that handles all of that for you. Makes life much easier. STL containers Obliterator13-Sep-01 6:50 Obliterator 13-Sep-01 6:50  Hi all, I'm just beginning to learn STL, primarily the container classes and wanted to know what is the best way to store two related values. For example I wish to store x and y points in a graph... The vector container looks ideal for my needs... but am I correct in assuming I have to create my own class to contain the x and y values? Then store instances of my class in the vector container? Or, would the map container be me more suited to this purpose? Basically I need to know the most generic, but fast, way of storing such x y values. Thanks all. -- The Obliterator Re: STL containers Tomasz Sowinski13-Sep-01 6:56 Tomasz Sowinski 13-Sep-01 6:56  The vector container looks ideal for my needs... but am I correct in assuming I have to create my own class to contain the x and y values? Just use std::pair for that. Or, would the map container be me more suited to this purpose? It depends - if you want to frequently search for given x, the map may be better. Tomasz Sowinski -- http://www.shooltz.com Re: STL containers Obliterator13-Sep-01 7:03 Obliterator 13-Sep-01 7:03  Wow, lightening fast response. Cheers... never even heard of std::pair.... Will look into it, thanks. -- The Obliterator

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