Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

SetTimer

Posted on 1998-12-08
1
Medium Priority
?
713 Views
Last Modified: 2006-11-17
Hi... I have a dialog based MFC app. In OnInitDialog, I start a timer with 1000msec delay. I use the standard SetTimer. Whenever the time passes, I call WM_TIMER and run an algorithm. My question is this: the algorithm I run is very important and needs to be precise. But WM_TIMER is a low priority message. How do I improve the accuracy, or how do I make the message more high priority? I want to try avoid multimedia timers because I have tried them and got lost. Standard SetTimer is nice and simple.
0
Comment
Question by:rose3377
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 6

Accepted Solution

by:
snoegler earned 150 total points
ID: 1179530
Please try this code (multimedia timers):

// Global variable:
UINT uTimerID;

void CALLBACK MyTimerProc(UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
{
  if(uID!=uTimerID) return;
   // Do your work here
}

.
// somewhere in your app
  DWORD dwUser=0;// argument to MyTimerProc
  uTimerID=timeSetEvent(1000,0,(LPTIMECALLBACKPROC)MyTimerProc,
                                             dwUser, TIME_PERIODIC);

// Cleanup:
  timeKillEvent(uTimerID);

This code sets up a multimedia timer with the maximum possible resolution
(uResolution=0), and passed one user defined argument to it (dwUser). This could be a
pointer to the class you originally had the 'OnTimer()' routine in. Passing it this way allows
to access the class members within 'MyTimerProc'.
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: SunnyDark
This article's goal is to present you with an easy to use XML wrapper for C++ and also present some interesting techniques that you might use with MS C++. The reason I built this class is to ease the pain of using XML files with C++, since there is…
Many modern programming languages support the concept of a property -- a class member that combines characteristics of both a data member and a method.  These are sometimes called "smart fields" because you can add logic that is applied automaticall…
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.
Suggested Courses

618 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question