handle

Recently, I read a white paper by an individual who refers to a pointer to a struct as a handle. The author was clearly someone who had written C code on the windows platform previously. Googling indicates that windows programmers interact with system components via handles. I am wondering if it is common practice for windows programmers to refer to all struct pointers as handles? Or is the term handle meant to convey something beyond pointer to struct? I am asking as a linux C programmer. The white paper I am referring to is: Duff, Heroux, and Pozo. An Overview of the Sparse Basic Linear

I want to properly reuse a curl handle, so that it won't give me errors and function normally. Suppose I have this piece of code: CURL *curl; curl_global_init(CURL_GLOBAL_ALL); curl = curl_easy_init(); curl_easy_setopt(curl, CURLOPT_USERAGENT, "Mozilla/5.0..."); curl_easy_setopt(curl, CURLOPT_URL, "http://www.google.com"); curl_easy_perform(curl); curl_easy_setopt(curl, CURLOPT_URL, "http://www.bbc.com"); curl_easy_perform(curl); curl_easy_cleanup(curl); curl_global_cleanup(); Would this be a good or correct way of reusing a curl handle? Or do I need to use curl_easy_reset() on that handle? I

i use to create a custom function like winexec(...):Hwnd that will retun the handle of executed application. i did use the findwindow() but having problem if it change window caption. There is no general way to get "the" window handle of an application because there's no guarantee that any program has one window handle. A program may have many top-level handles (i.e., Microsoft Word, one for each document), or it may have no windows at all. You might question what you really need the window handle for; there could be better ways of doing whatever it is you're trying to do that don't require

I was debugging a complicated bug recently. It was caused by accessing a non-existing Form.Handle (garbaged pointer). The bug revealed itself in rather unexpected way for me - accessing Forms Handle caused resizes and repaints. I would expect accessing Form.Handle by a garbage pointer would just return some garbage THandle. Expecting that the Handle is created once on form creation and stays the same till the Form is destroyed. The question Why is it so, that TForm.Handle is not a field that gets initialized on form creation and is accessed via property Handle: Integer read FHandle; , but is a

I have the following code which is a graphic rendering of the movement of a satellite around the Earth. function ex global state; fh = figure('Menu','none','Toolbar','none','Units','characters'); hPanAni = uipanel('parent',fh,'Units','characters','Position',... [22.6 10.4 53 23],'title','Controls','FontSize',11,... 'FontAngle','italic','FontWeight','bold'); hIniAni = uicontrol(hPanAni,'Style','pushbutton','Units','normalized',... 'Position',[0.14 0.75 0.5 0.12],'String','Spin',... 'FontSize',10,'Callback',@hIniAniCallback); hFinAni = uicontrol(hPanAni,'Style','pushbutton','Units','normalized',

I know that to get access to a configured twitter account using twitter framework in iOS 5, the following can be done: ACAccountStore *t_account = [[ACAccountStore alloc] init]; ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter]; [account requestAccessToAccountsWithType:accountType withCompletionHandler:^(BOOL granted, NSError *error) { if (granted == YES) { } } But the problem is that I don't have need for a full account, I just want the twitter name if he has configured any on the twitter accounts. So, Is there a way to get just the

I am trying to handle a mouseclick event on a particular form that should fire if the mouse cursor falls between a set of coordinates - lets say a square. I understand that if I had an empty form I could simply tie in to the mousemove event and off I go. But in reality there may be up to 10 different overlapping controls and in my test app the mousemove event only fires if the cursor is on the actual form itself and not if its over a child control. Does anyone know how to handle this event when there are an unknown number of child controls at design time? Is there an easy one-liner I can use?