C :: Detect CPU Power Button Press Event In Console Application
Feb 5, 2015
I am using Windows 7 32bit OS and want to detect the CPU power button press event in my console application developing in C language.
I configured the power button setting to "Do Nothing" which is in "Choose what the power button does" options in Control Panel->Hardware and Sound->Power Options. So now i want to detect this power button press event and do some processing in my application then i will initate shut down from application itself. Looking for windows API details which will detect the power button press event.
I'm trying to implement this on ubuntu, to compile and run only under ubuntu.
I found 100s of other attempts at answering the general question of arrow key press in c++. Nothing solid.
Some recommend using the Readline for the functionality I am trying to implement, but I need to stay clear of GNU licences if I can for this project. And some tips only work on projects for windows machines... for example the conio library.
For linux there may be the option of using the ncurses library which I will take a look at, but I am stubborn and want to implement this myself. It should be an easy straight forward thing to do, which is why I am a bit frustrated at the moment.
So! This works... 80% of the problem is solved. If you compile this, g++ under linux, ubuntu in my case, and run. Each keystroke reveals the correct key numbers.
q=113 w=119
when I click on the up key I get,
up = 279165
I thought, I can use this number is a if(int == '279165') to detect the up key.
I was not so lucky... this int is not behaving like an int!
So I modified the code to see it I could carry out an int operation on this number.
Compiling and running this, and pressing the UP key gives the following number.
100027100091100065
Some some sort of array, something like, [27][91][65].
I tried all ways to access these individual numbers, actually the third one for comparison purposes, but no luck.
For completeness sake I list the other arrows.
UP = [27][91][65] DOWN = [27][91][66] LEFT = [27][91][68] RIGHT = [27][91][67]
A little further digging shows that these numbers are derived from the representation of a "multi-char" constant, the data type given when pressing special characters...
Now here is the main problem I have, I can find ANY decent documentation on how to handle and play with "multi-char" .
I have a problem where I need to add the ability to input numbers into a calculator program through either a form button press or keyboard press. I have the button press working fine though I can't seem to get the program to start with the cursor active in the textbox for keyboard input. I've use this.ActiveControl = result; "result" being the textbox. Though the issue here is the program starts off with the cursor active but only for the first instance of keyboard inputs.
Perhaps its the way I wrote the program but is there a way I can achieve this? I found a way to write this calc by having a single event for all button presses, opposed from an event for 1-9. Not sure if this is a good approach but here is some of the code.
I would like to have my program pause at a certain screen but not to have the "Press any key to continue..." message or the press of a button. In my program, the code looks similar to this:
for(;;) { cout cin cout cin ... //
here, I want to have a pause to view what the for loop has come up with but to not have a message display or a button press needed. At the end of the loop, I want it to pause before looping again. IS this possible?
I made this (found the trick on the net)that allow to use the guide button of a 360 pad. I use wxdevc++.
#include <windows.h> #include <stdio.h> static const int guide_button_value = 0x0400; /* the secret function outputs a different struct than the official GetState. */ typedef struct { unsigned long eventCount;
[Code] .....
But I wanted to detect if it's held down for 3 second before do my printf
The usual solution is to detect if the button is pressed and if it's realeased but I can't use ximputgetstate or regular getstate (or I haven't successfully done it) .
(OS Windows)how do i detect when a file has been changed ? do i need to monitor this file and check the last modified date&time? (how do i do this?) furthermore how do i detect a certain application launch?
I basically want to develop an application which print an existing file on reception of a network event (application will be running on a seven 64 bits PC).
I wonder which application type would be the most suitable (and the simplest) for that (console win32, win32 app, MFC app ...). As this application does not need user intervention (print on network event), I'm not sure that I need a MFC application or a win32 app.
I have a question about to run an MFC dialog based C++ application from console: if I run my application from console, I see the application start and the console immediately back to prompt. I need that console wait the application exit before show me the prompt again. I tried on Visual Studio 6, 2005 and 2010 but the behavior is the same.
my C++ console application should be like a command prompt. There are "command lines" to execute in the command prompt.Here are my main prompts for spotlight:
Encode - New data entry View - Read data from text file Search - Find record from text file Update - Save changes per text line from the existing text file Delete - Delete lines from the text file
Now, I manage to do the tasks for Encode, View, and Search..But unfortunately, not in Update..I've been working this for a week already..
#include "stdafx.h" #include "iostream" #include "string" #include "fstream" using namespace std; //to omit the std }
I'm thinking of making a horror text-based game, which would use sounds, if you could also tell me of an API to display images in an alternate window that would be nice.
I am stuck in visual studio 2010 file I/O ... i placed file1 file2 using the following program under VS2010/projects/projectname/file, file1 and also in debug also once......I am actually using cmd line arguments in debug mode
Code: // feof files.cpp : Defines the entry point for the console application. //
#include "stdafx.h" #include<stdio.h> #include<stdlib.h> #include<conio.h> int main(int argc, char* argv[])
[Code] ....
I dont think in C++ forum the printf will do any problem...when i run the program it says "cannot open source file" and a window appears saying"Debug assertion failed"....and other details such as Expressionstream!=NULL).perror
I'm building a simple system management console application. I've abstracted the console "Menu" and derived from it a "WelcomeMenu" class with public inheritance.
The problem is that when instantiating a Menu* object and assigning it a new WelcomeMenu...I'm still not able to use WelcomeMenu's "ShowWelcomeMessage() with the Menu* object. Instead, I get "error: Class 'Menu' has no member function call 'ShowWelcomeMessage().' Which is true, but I thought a pointer-to-Menu object should be able to use the public methods of derived classes without casting in this case. Code follows.
// Menu and WelcomeMenu Classes #ifndef MENU_H #define MENU_H
I want to open one new CMD from console application, write text into the new CMD and then coming back to the control on the old cmd. (like interactively working on the both)
look into the below code
Process P1 = Process.Start(@"C:WINDOWSsystem32cmd.exe"); P1.StartInfo.RedirectStandardInput = true; P1.StartInfo.RedirectStandardOutput = true; P1.StartInfo.UseShellExecute = false; StreamWriter wr = P1.StandardInput; wr.WriteLine("First line in New Cmd"); Console.WriteLine("First line in Old Cmd"); wr.WriteLine("Second line in New Cmd"); Console.WriteLine("Second line in Old Cmd");
it is giving the exception "StandardIn has not been redirected"
I'm trying to write a program that passes Windows messages back and forth from another program that controls a laboratory instrument. I was able to write a program that successfully passes instructions, as evidenced by the instrument doing what I tell it. However, I am having trouble getting a return status from the instrument. The manual instructs the following:
// demo code, etc. // send message to the instrument operating software here... SendMessage(hwnd, WM_COPYDATA, tag, (LPARAM) &cd)
Either a completion message or return data is returned. Remote commands ReturnStatus, ReturnTiming, and ReturnData return data. In either case, data is received through an asynchronous windows message inside Win32 COPYDATASTRUCT type data packet.For example, a typical OnCopyData window callback is shown below, where the string data retrieved is finally stored into a Microsoft CString object. Note the use of variable replyTag, discussed above, which is used to isolate the correct windows message returned.
BOOL CUserDlg::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* cd) { …. if (cd->dwData == replyTag) { /* String pointing to status */ CString retStatus = (char*) cd->lpData; } …. }
I can't tell if my problem is in generating the replyTag, getting the HWND to my own console window, or the actual receiving part of the code.
When setting the replyTag, the manual instructs: UINT replyTag = RegisterWindowMessage(“SOFTMaxProReplyMsg”);. However, I have to put an "L" in front of the string or I get a data type error (can't convert const char* to LPCWSTR).
When setting a HWND for myself, the manual instructs: HWND MyWnd = GetSafeHwnd().
That produces an error because GetSafeHwnd is a function of the Cwnd class, and I don't have a Cwnd. I have replaced it with HWND MyWnd = GetConsoleWindow();
When listening for the reply message, the manual instructs what I quoted above. However, I again don't have a Cwnd. I therefore simply used
The above if statement always evaluates false, and the cd.lpdata contains the message that I had sent out instead of a reply message. How to get a reply using my console application. Here is the full code of my function:
Code: #include "stdafx.h" #include<iostream> #include<vector> #include<string> #include<afxwin.h> using namespace std; void SendCommand(string command) { // Get tags to identify the receiving and sending messages
