Solved

Faster Draw/Refresh in PictureBox

Posted on 1997-04-16
2
966 Views
Last Modified: 2006-11-17
I use a PictureBox control to display a network, i.e. a BIG number of Lines, Circles and Text. Drawing/Refreshing is VERY SLOW. Are there any techniques to accelerate the process?

Have heard something about "drawing in memory" but don't know what it is and how it's working. Has it something to do with .hDC property?
0
Comment
Question by:sujevs
2 Comments
 
LVL 7

Accepted Solution

by:
kamall earned 100 total points
ID: 1425400
To draw fast enough on a Picture object you must:

Either
Use a DoEvents (not Picture1.Refresh) after each line or circles is drawn,

Or
Dont use Refresh or DoEvents until you finish your drawing and then give a DoEvents. This is much faster than the first solution.

0
 

Author Comment

by:sujevs
ID: 1425401
The problem is that I don't use Refresh or DoEvents to update the picture, so the solution provided unfortunately does not help me a lot, though it could be valuable in the future for some other occations :)
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

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

Introduction While answering a recent question about filtering a custom class collection, I realized that this could be accomplished with very little code by using the ScriptControl (SC) library.  This article will introduce you to the SC library a…
Article by: Martin
Here are a few simple, working, games that you can use as-is or as the basis for your own games. Tic-Tac-Toe This is one of the simplest of all games.   The game allows for a choice of who goes first and keeps track of the number of wins for…
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

777 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