Starting with Vista you have to use the Core Audio API to control the system volume. It’s a COM API that doesn’t support automation and thus requires a lot of boilerplate to use from .NET and PowerShell. Anyways the code bellow let you access the [Audio]::Volume and [Audio]::Mute properties from PowerShell. This also work on … Read more
You should call GetFileSizeEx which is easier to use than the older GetFileSize. You will need to open the file by calling CreateFile but that’s a cheap operation. Your assumption that opening a file is expensive, even a 12GB file, is false. You could use the following function to get the job done: __int64 FileSize(const … Read more
Ah, yes, this is one of the caveats of using the Windows console subsystem. When the user closes the console window (regardless of how the console was allocated), all of the processes that are attached to the console are terminated. That behavior makes obvious sense for console applications (i.e., those that specifically target the console … Read more
There is no standard library function to do this, but it’s not too hard to roll your own. There is an existing question on SO about doing this that was answered with source code.
Choose your poison: http://msdn.microsoft.com/en-us/library/aa365574%28VS.85%29.aspx The following IPC mechanisms are supported by Windows: Clipboard COM Data Copy DDE File Mapping Mailslots Pipes RPC Windows Sockets The closest to DBus is COM.
Newer Mingw versions support -municode linker option switching to alternate startup code allowing to use wWinMain instead of WinMain (or wmain instead of main). Add it to your command line, linker options in IDE or makefile. g++ other_options_and_arguments -municode Older versions do not support this option. One thing to note is that Visual C++ supports … Read more
MSDN states: Interprocess Communication Between 32-bit and 64-bit Applications 64-bit versions of Windows use 32-bit handles for interoperability. When sharing a handle between 32-bit and 64-bit applications, only the lower 32 bits are significant, so it is safe to truncate the handle (when passing it from 64-bit to 32-bit) or sign-extend the handle (when passing … Read more
try this: viewer.setWindowState( (windowState() & ~Qt::WindowMinimized) | Qt::WindowActive); viewer.raise(); // for MacOS viewer.activateWindow(); // for Windows it work in my project ( in my project viewer is QMainWindow): https://github.com/iptton/Rythem .
I’d consider it quite safe to assume that std::string allocates its storage contiguously. At the present time, all known implementations of std::string allocate space contiguously. Moreover, the current draft of C++ 0x (N3000) [Edit: Warning, direct link to large PDF] requires that the space be allocated contiguously (§21.4.1/5): The char-like objects in a basic_string object … Read more
On Windows XP, if an application entry is WinMain, does Windows convert the command line from Unicode to Ansi and pass to the application? Yes. If the command line parameter must be in Unicode (for example, Unicode file name, conversion will cause some characters missing), does that mean that I must use wWinMain as the … Read more