Show descrition text (WINAPI)
I was wondering how I can show description text. By this I mean, for example if you hover over the Start button a small description will appear saying "Start". How are these invoked? Thanks ...
c++
Getting values of an object after a call to rotatef c++
Hi, I need to access the X,Y values of a vertex object after Ive rotated it (with glRotate3f). How is it possible? I need em to solve an object collision problem where collisions will be sending objects in an angle related direction based upon objects rotation degrees. edit:: Ok, Ive come close to find a way. Lets assume X and Y and d...
How Can I Generate Equivalent Output Using the CryptoAPI and the .NET Encryption (TripleDESCryptoServiceProvider)?
I have some C#/.NET code that encrypts and decrypts data using TripleDES encryption. It sticks to the sample code provided at MSDN pretty closely. The encryption piece looks like the following: TripleDESCryptoServiceProvider _desProvider = new TripleDESCryptoServiceProvider(); //bytes for key and initialization vector //ke...
Where is shared_ptr?
I am so frustrated right now after several hours trying to find where shared_ptr is located. None of the examples I see show complete code to include the headers for shared_ptr (and working). Simply stating std, tr1 and <memory> is not helping at all! I have downloaded boosts and all but still it doesn't show up! Can someone help me by ...
CImg compile problems in Codegear 2009
I wish to use the CImg library for image processing in my current project. I am using Codegear C++ Builder 2009. I include CImg.h in the source file and put in the following code: int rows =5; int cols = 5; CImg<double> img(rows,cols); I get the following error: [BCC32 Error] CImg.h(39159): E2285 Could not find a match for 'CImg<uns...
Calling a non-exported function in a DLL
I have a program which loads DLLs and I need to call one of the non-exported functions it contains. Is there any way I can do this, via searching in a debugger or otherwise? Before anyone asks, yes I have the prototypes and stuff for the functions. ...
std::out_of_range error?
I'm dealing with a file with a linked list of lines with each node looking like this: struct TextLine{ //The actual text string text; //The line number of the document int line_num; //A pointer to the next line TextLine * next; }; and I'm writing a function that adds spaces at the beginning of the lines found i...
How can I pass Arguments to a C++ program started by the Registry?
Hello, I'm creating a Win32 program that will be executed every time the computer turns on. I manage to do this by adding the .exe path into the registry. The problem is; I want to make the program appear minimized in the system tray when the computer is turned on but if I double click it [after the computer turns on and the program is ...
Obtaining command line arguments in a QT application
The following snippet is from a little app I wrote using the QT framework. The idea is that the app can be run in batch mode (i.e. called by a script) or can be run interactively. It is important therefore, that I am able to parse command line arguments in order to know which mode in which to run etc. [Edit] I am debugging using QTCr...
Can my thread help the OS decide when to context switch it out?
I am working on a threaded application on Linux in C++ which attempts to be real time, doing an action on a heartbeat, or as close to it as possible. In practice, I find the OS is swapping out my thread and causing delays of up to a tenth of a second while it is switched out, causing the heartbeat to be irregular. Is there a way my thr...
C++ Templates: Convincing self against code bloat
I have heard about code bloats in context of C++ templates. I know that is not the case with modern C++ compilers. But, I want to construct an example and convince myself. Lets say we have a class template< typename T, size_t N > class Array { public: T * data(); private: T elems_[ N ]; }; template< typename T, size_t N > ...
Read all files inside a folder including files in subfolders using C++
I want to read all files inside a given folder(path to folder) using FindFirstFile method provide in windows API. Currently I'm only succeeded in reading files inside the given folder. I could not read files inside sub folders. Can anyone help me to do this?? ...
Adaptor Pattern
What are the practical uses of Adaptor Pattern? ...
Dynamic library Linking at execution
Hi, why did it fail to load the library at link at compilation time? i don't care about freeing the library yet it just won't work. #include <windows.h> int main() { LoadLibrary("winmm.lib"); timeGetTime(); } ...
C++ Euler-Problem 14 Program Freezing
I'm working on Euler Problem 14: http://projecteuler.net/index.php?section=problems&id=14 I figured the best way would be to create a vector of numbers that kept track of how big the series was for that number... for example from 5 there are 6 steps to 1, so if ever reach the number 5 in a series, I know I have 6 steps to go and I h...
Passing a Structure containing an array of String and an array of Integer into a C++ DLL
I'm having problems with marshaling in VB.NET to C++, here's the code : In the C++ DLL : struct APP_PARAM { int numData; LPCSTR *text; int *values; }; int App::StartApp(APP_PARAM params) { for (int i = 0; i < numLines; i++) { OutputDebugString(params.text[i]); } } In VB.NET : <StructLayoutAttribute...
How can I call Objective-C code (specifically code from Mac system libraries) from C++/Qt?
Also, what is the difference between a .m and a .mm file? Or is that just some convention that Nokia uses for Qt? ...
what is the Different categories of pointers?
Can any body explains about the different categories of pointer(like wild pointers)? ...
Any tips for how to build a LED system thet will light up to music?
So basically I would like somehow that given an audio file as input (most likely mp3 or I can use some audio engine that will handle other types too) from my computer to control some LED lights so they will be something like an oscilloscope, like the one in winamp. What would I need to be able to do this? I'm interested in building thin...
How to enable core dump in my Linux C++ program
My program is written in C++. compiled with gcc, using -g3 -O0 -ggdb flags. When it crashes, I want to open its core dump. Does it create core dump file, or I need to do something to enable core dump creation, in the program itself, or on computer where it is executed? Where this file is created, and what is its name? ...