Visual C++ :: Add USB Plug And Play Feature Inside DLL
Nov 5, 2013
I have designed a vc++ dll for a controller. I want to add usb plug and play feature inside the dll. I searched on line and came to know:
"If the project is an unmanaged C++ DLL project, then I can only create windows in an unmanaged way, i.e. the usual Win32 API way, such as adding a new dialog box as a resource, or simply using RegisterClassEx() and CreateWindowEx() to create the window yourself, then pump messages for those windows using GetMessage(), TranslateMessage() and DispatchMessage()."
how to use this concept.
I have created a separate application (in delphi 2007) that load this Dll. But I want to add this Plug and Play feature inside me dll.
Consider a map that has the following properties; - the map is two dimensional - the map is perfectly square with dimensions 10000000x10000000 - the map has an associated set of many features - the map does not "wrap around"
Each feature on the map is described by a 2D coordinate in the range (0, 0) to (10000000, 10000000).
Find the most isolated feature on the map, where the "most isolated feature" is the feature that is furthest (largest Euclidean distance) from any other feature. Because the map does not "wrap around", this should be a direct distance across the map.
<----10000000----> --------------- - | A | | | | | | | 10000000 | | | | B C | | | E D | | --------------- -
In the example above, A is the most isolated feature on the square map with edge length 10000000. Write a program that reads in many features from standard input, and outputs the name of the most isolated feature to standard output. The format of the input is the feature name, x coordinate and y coordinate separated by spaces.
Each feature is on a new line. There may be any number of features between 1 and 100000. The program should be fast, so the algorithm must be better than O(n^2).
Any of the following languages are fine - C++, Python (>=2.5), C#, Java. The program shouldn't require any third-party libraries other than the chosen language's standard libraries, and should be compilable and runnable on a modern Windows or Linux development environment of your choice (e.g. MS Visual Studio, gcc, Eclipse etc). You should submit your program source code and any necessary makefiles or project files required for compilation. If you write the code in C++, using C++11 features is fine.
I am writing an application that needs to temporarily disable the Play/Pause button that appears on multimedia keyboards.
Normally, a key can be blocked quite easily by installing a low level keyboard hook (WH_KEYBOARD_LL) where the KeyboardProc intercepts the key (in this case VK_MEDIA_PLAY_PAUSE) and returns a "1" instead of calling CallNextHookEx. I have tried this with other keys (including the Windows key VK_LWIN) and this works perfectly. I also have no problems with this method under Windows 7 where all keys, including VK_MEDIA_PLAY_PAUSE get blocked.
Windows 8 is a different story. When my application has input focus, everything works as expected, meaning the VK_MEDIA_PLAY_PAUSE key gets blocked and no other application responds to it. However, when my application loses focus, my hook procedure gets called (this was verified by sending out a OutputDebugString) but other applications respond to key even though I return a "1". As soon as my app gets focus again, everything is block as it should.
After some investigation, I found that the multimedia keys not only generate keystrokes but also generate WM_APPCOMMAND messages so I added ShellProc (WH_SHELL) hook with the following hook procedure:
LRESULT __declspec(dllexport)__stdcall CALLBACK ShellProc(int nCode,WPARAM wParam,LPARAM lParam) { // Do we have to handle this message? if (nCode == HSHELL_APPCOMMAND) { OutputDebugStringX(">>>>> HSHELL_APPCOMMAND");
[code]....
This procedure is only getting called when my app has input focus. Whenever I have input focus and return "1" the Play/Pause command gets blocked. As soon as I lose focus the procedure does not get called/hooked.
As I have mentioned, the code works for other keys, just not the multimedia keys.
Alternatively, another way of blocking the multimedia keyboards Play/Pause button?
I'm confused with this last [for] loop; How is ptr++ applied for non-integer value? Ptr is clearly a char, it comes from str, which reads string line from file.
I come from C# background, I have never met for...loop which irritates by using [somechar]++, not [someinteger]++; What is actually going on there?
Some other similar example might be:
Code: (iColor+(_parts[j]%length)*3),
where iColor is static unsigned char iColor[] array;
I would expect to see iColor[somevalue] + (_parts[j]%length)*3), but here in C++ I sometimes see that integer is being added directly to the array. What does it mean, what happens?
I understand how to play a .wav file in a program, but I am attempting to "package" the .wav file with the project so that it can be played by another person, on a different machine (namely, my professor). The way I have come to understand this is that if you use the following line of code:
The sound file would not play if it is not in the same location on the other computer. Am I correct? Assuming that I am, I have added the file that I wish to play as a resource in my project, but I can't figure out how to make it play. Looking at MSDN (and other resources) I found the following snippet:
I get no errors when I build the program, but no sound plays when I run it. I have tried for hours now to figure this out (which is usually enough time for me to sort through the problem) but I have met with no success. This leads me to believe I am either completely off in my assumptions, or I am making a silly mistake.
Suppose you want to develop a program to play lottery. The program randomly generates a Lottery of a three-digit number( any number from 100 to 999), prompts the user to enter a three-digit number, and determines whether the user wins according to the following rule:
1. If the user matches the lottery in exact order , the awards is $100,000. 2. If the user input matches the lottery digits, the awards is $50,000. 3. If two digit in the user input matches a digit in the lottery, the awards is $30,000. 4. If one digit in the user input matches a digit in the lottery, the awards is $10,000.
Sample: The winning number is 865.
Your ticket is 865 then 100000 Your tickect is 686, or 568,.. all digits are right but not in order You get 50000 Your ticket is 860, or 186 .. then 30000 Your ticket is 800, 706, 600.. just one digit much you get 10000 Else 0
Im using if/else statements. Which syntax would I use to figure out the limit between 100-99?
I have a Blackjack game that allows users to create a login account and it keeps track of their bet amount, and total bank,etc. How can I connect the program on 2 or more computers so that people can play together?
(A) How would I code it? (B) Can I just connect a USB or HDMI and use the appropriate code? (C) Do they need to be executables instead of just running out of Visual Studio? (D) Can this maybe done over Wi-fi? (E) Or is this something more complicated like over a VPN?
"Write a program to play a numbers guessing game. The user thinks of a number between 1 and 100 and your program asks questions to figure out what the number is (e.g., "Is the number you are thinking of less than 50?"). Your program should be able to identify the number after asking no more than seven questions. Hint: Use < and <= opeartors and the if-else construct."
What I've managed so far, but what I have seems to be lacking
I got this code from a wiki that taught me how to make C code that plays audio, and with a few changes I was able to get it to take a command-line argument as the music file name. Here it is
The only problem is, even though I guess it needs to create a window to work with SDL, is there any way you could hide it or something so the user can't see it? I don't really want to see it ( I'm planning on running it from Batch files or C applications as an easy way to play an audio file once ), because if I did, I might as well just use a default audio player instead.
So , i had to make an rock paper scissors game . After lot of hard work and struggle ,I completed it but my professor rejected it since I didnot add option where it says "Would you like to play again .Y/N " . The code has too many brackets ! Here is my code
#include <iostream> #include <ctime> #include <cstdlib> using namespace std;
// for displaying the outputs to the user; passing string to functions void user_win() {
i want to create a program (in c++ or c#) that will play mp3 files but also display a word file with the lyrics of the mp3 song playing. so if i choose a mp3 file from a list, the lyric file for that song should also be displayed. i have all the mp3 and lyric files saved on the computer so my problem is how can i link the files?
OK, so the program is working minus the play again loop. I even tried a goto statement for it but no luck. Basically what its doing is after the game runs its course it asks if you would like to play again? If you hit Y it starts over but if you it N it starts over. I want it to out put thank you for playing and close after user hits a button.
// C// Guess My Number // The classic number guessing game
#include <iostream> #include <cstdlib> #include <ctime> using namespace std;
I'm trying to create a program that will play scales at certain frequencies, but my arrays are not initializing correctly. I've read up to double check what i'm doing but it doesn't seem to be working. My only guess is my use of a global variable.
const int NotesInScale = 8; class Scales { private: //all Major Scales int CMajor[NotesInScale]; int GMajor[NotesInScale];
[Code] ....
i'm simply trying to put the frequencies in the scales (the numbers in the array) but I keep getting an error. I feel its a simple fix but i'm not seeing it.
I'm making an apllication which needs to play .wav file when user type something inside QTextEdit. I made some code but after minute or less the sound stops, so I made silly workarround. After 30 clicks I invoke sound->stop(); and then the loop start again, that works, but it's not good, can you give better solution. Here is my code:
