handle

I read a few threads about the MainWindowHandle but i couldnt find a solution for my problem, i'm starting a gui application and want to get the MainWindowHandle through the process object, but the handle value is always zero if i'm not going to wait with thread.sleep() until the gui is loaded. i'm also tried to use WaitForInputIdle but it didnt help at all. process.Start(); process.WaitForInputIdle(1000); while (process.MainWindowHandle == IntPtr.Zero) { Thread.Sleep(100); } // do something with the handle he is never leaving the while, if i'm replacing the waitforinputidle with a normal

Windows handles are sometimes annoying to remember to clean up after (doing GDI with created pens and brushes is a great example). An RAII solution is great, but is it really that great making one full (Rule of Five) RAII class for each different type of handle? Of course not! The best I can see would be one full generic RAII class with other classes just defining what to do when the handle should be cleaned up, as well as other handle-specific aspects. For example, a very simple module class could be defined like this (just an example): struct Module { Module() : handle_{nullptr} {} Module

The problem comes when I am trying to use MATLAB handle objects as key values in MATLAB containers.Map . ld( h1, h2 ) defines a linear order on handle objects, so there should be no limitation on using handle objects as key values for maps, however only integer or string types are allowed. A workaround for this problem could be retrieving the actual ids (addresses) of handle objects (which are basically being compared in ld function). So the question is: how to get the ID of a handle object? Found out that a workaround can be done using persistent variables in static member functions. In this

A module can be unloaded, so how can I tell for sure if it is still in memory? I have a handle to it, obtained from GetModuleHandle. When I tried calling GetHandleInformation on it I see error 0xc0000008 - "An invalid HANDLE was specified." This happened before it could have been unloaded. The term "handle" is a bit overloaded here - lots of different classes of objects in the Win32 API are called "Handles". GetHandleInformation is used for handles to kernel objects - files, registry keys, mutexes, etc. The HMODULE returned by GetModuleHandle is used by the loader and is not an actual kernel

For some reason, I can't get filehandles working with Expect.pm's log_file method. I originally got help on How can I pass a filehandle to Perl Expect's log_file function? , where it was suggested that I use an IO::Handle filehandle to pass to the method. This seems to be a different issue, so I thought I'd start a new question. This is the offending section of Expect.pm: if (ref($file) ne 'CODE') { croak "Given logfile doesn't have a 'print' method" if not $fh->can("print"); $fh->autoflush(1); # so logfile is up to date } So, then, I tried this sample code: use IO::Handle; open $fh, ">>",

Microsoft played safe here. In their article, "Creating a Child Process with Redirected Input and Output" , they are saying: The remaining open handles are cleaned up when this process terminates. To avoid resource leaks in a larger application, close handles explicitly. Which is perfectly useless. What handles? In which process? I want to get my head around it. When a handle is created in parent process with SECURITY_ATTRIBUTES.bInheritHandle = TRUE , a child process can see and use it, and the handle has the same value and access rights in both processes. But is it the same handle, or is it

I've got this method in Android: public void insertarTitulo(String _id, String title, String url){ ContentValues cv = new ContentValues(); cv.put("_id", _id); cv.put("title", title); cv.put("URL", url); try{ getWritableDatabase().insert("book", "book", cv); }catch(SQLiteConstraintException e){ Log.e(MyActivity.LOGTAG, "This code doesn't show"); } close(); } title value is unique so when I insert a duplicate value throws me the Constraint error, so far that's correct. Everything works as expected. but I can't make the catch code work. Try using insertOrThrow . Otherwise, insert just returns -1