Playing audio using a button

Hi - I want to create a quiz item where people listen to a
phrase and have to type in the answer. I need them to have a simple
device which they can click to allow them to listen to the phrase
several times if necessary. The typed in answer will then be scored
and added to their overall quiz result. I have searched the forum
and answers seem sketchy so wondered what the best practice was for
this? If possible I would like to add this to a question pool
too.

Hi ntompkins
Would a rollover work for you instead of a button? If so, you
could accomplish it by inserting a Rollover Image or Rollover
Caption. Then assign the audio clip to the Caption or Image that
would appear when your user moused over. As long as they held the
mouse over the rollover area, the audio would play. (well, until it
completed anyway) But it could be moused over time and again to
hear the audio.
The Caption could be configured with no text and transparent.
The image could be a simple swatch of color that could be rendered
as transparent. That way the user wouldn't see anything. They would
only hear the audio.
These elements are able to be added to a Question slide. As
such, the question slide could be part of a larger pool.
Cheers... Rick

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#include "stdafx.h"
#include <dsound.h>
class AudioPlayer
private:
unsigned long long start_point,
playback_point,
break_point;
bool now_playing, loop, ignore_start_point;
int speed;
//and any data that stores an audio (can be either sound or music)
public:
void Play_or_Resume(); //Either starts playing or resumes the audio stored in private (Runs a thread that either increments or decrements the playback_point by the speed member and sets the now_playing member to true).
void Pause(); //Stops playing the audio stored in private until Play_or_Resume method is called (Just suspends the thread that was mentioned above and sets the now_playing member to false).
void Play(unsigned long long from = 0, unsigned long long length = -1, bool move_start_point_too = true);
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unsigned long long GetPlaybackPointPosition(); //Returns playback point's position that has been alreadyS mentiond above.
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unsigned long long GetBreakpointPosition(); //Returns the position of the break point that has been already mentioned above.
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unsigned long long GetStartPointPosition(); //Returns the position of the start point that has been already mentioned above.
void EnableRepeatMode(); //Sets the private loop member to true.
void DisableRepeatMode(); //Sets the private loop member to false.
void ToggleRepeatMode(); //If loop was true before calling this function, so after it is false. Otherwrise it is true.
bool IsRepeating(); //Returns whether audio repeats itself (from start point to either breakpoint or end of buffer). This function just returns the value of the loop member.
void SetSpeed(int num_sam_per_sec); //Modifies the number of samples that are played in every second.
//If number (integer) is negative, then audio is played in backward.
//When playback point reaches start point, then it is transferred to break point if it's position is not negative. Otherwise it is transferred to the end of the audio buffer.
void IgnoreStartPoint(); //Sets the ignore_start_point member to true. Then all methods always relate to start point as zero (even if it's value is not zero).
void ReferStartPoint(); //Sets the ignore_start_point member to false.
bool IsStartPointIgnored(); //Returns whether start point is ignored or not. This method just returns the value of ignore_start_point member.
int GetSpeed(); //Returns the number of samples that are played in every second.
void SetNumberOfChannels(byte new_value); //Modifies number of channels.
byte GetNumberOfChannels(); //Returns number of channels.
void SetBlockAlign(byte new_value); //Sets block align.
byte GetBlockAlign(); //Returns block align.
const char* LoadAudioFromComputer(const char* path_and_name_of_file, AudioPlayer* lpAp, bool auto_start_playing = true);
//This function fills the instance pointed by 'lpAp' parameter with the data of the audio file redirected by 'path_and_name_of_file' parameter, and calls the Play_or_Resume method of this instance if auto_start_playing is true.
//If the function succeeds, then it returns "succeed". Otherwise (if the function fails) then it returns an error string that describes the problem (the reason it failed). It can be sent to output, so it can be read, by either call to MessageBox, printf, std::cout, TextOut, DrawText functions and etc.
//The function can fails, because the file was not exist, or could not be opened for reading, because it was opened by another process, or the file was either encrypted or protected, or corrupted, or was not audio file, but text, image and etc.
I want to implement all methods of the AudioPlayer class and the LoadAudioFromComputer function by myself using DirectSound (the <dsound.h>) and all functions, interfaces, methods, structures, etc... that this header provides, but I don't know how! I
need your help! This is difficult for me to find in the internet the information I need to do this. MSDN is teaching all this stuff, but this is too difficult! I need you to implement all these methods of the AudioPlayer class and the LoadAudioFromComputer
function for me using DirectSound and the <dsound.h> and the explanations I wrote in comments, and then post the code. I will copy it to mine and read it all to learn. Please use comments so I can understand. I will thank and appreciate anyone who will
donate his time to help me and do this for me! :D

Microsoft pulled the plug on DirectSound HAL in Vista due to lack of hardware support. The SAL exists for
software compatibility, good intention but bad performance as there is no longer a direct path from
DirectSound to audio drivers.
People choose DirectSound for its Direct-ness
but there is no reason to choose it now.
DirectX SDK was integrated
with WIndows SDK which ships with Visual Studio 2012 so you don't need additional downloads for
WASAPI and XAudio 2.
Just look up the documentation for headers/librarieslike every other Windows API you use. If you have a hard time to find the documentation then you need to go to search engines and find search engine tutorials.
There are plenty of samples for both WASAPI and XAudio 2, both in the Windows SDK and online. The DirectX team has some suggestions on which to use on their team blog.
You can find experts for those APIs at the Windows Desktop Pro-Audio Application Development forum and the
Audio/XACT forum on MSDN (link left out for you to practice your search skills). Again, it is fine to ask for hints but don't ask the whole
solution. You are competing with others who just need a hint to finish work here. The time spent on working on your assignment would be better spent on helping on giving hints to others.
Visual C++ MVP

Playing audio using a button

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