Solved

CreatePen , how to change color

Posted on 1997-06-01
2
411 Views
Last Modified: 2013-12-03
When i create a pen like CreatePen () , how do i do to change that pens color later ??
using bwc++ 4.02
Write a simple example.
0
Comment
Question by:superabbe
[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
2 Comments
 
LVL 2

Accepted Solution

by:
r parkinson earned 50 total points
ID: 1397781
There is no way to change a pen once it is created, however you can accive a similar effect if you use CreatePenIndirect, which takes a structure, and just modify the color parameter (hence maintaining the other attributes).  You can then 'switch' pens with the code :

// Create the first Pen.
hPen=SelectObject(hdc,CreateFontIndirect(&lgpn));

// Change a property of the pen here ...

//create a new pen, select the font to your DC and
//delete the previous pen.  
DeleteObject(SelectObject(hdc,CreateFontIndirect(&lgpn)));

//Delete the selected pen and replace it to the DC with the
//default pen.
DeleteObject(SelectObject(hdc,hPen));

0
 

Author Comment

by:superabbe
ID: 1397782
In my program the pen will change color when WM_MOUSEMOVE occur .
Is it possible that my GDI-res will be way out of control ??
like 1 % left or so ?
.

0

Featured Post

MS Dynamics Made Instantly Simpler

Make Your Microsoft Dynamics Investment Count  & Drastically Decrease Training Time by Providing Intuitive Step-By-Step WalkThru Tutorials.

Question has a verified solution.

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

zlib is a free compression library (a DLL) on which the popular gzip utility is built.  In this article, we'll see how to use the zlib functions to compress and decompress data in memory; that is, without needing to use a temporary file.  We'll be c…
As more and more people are shifting to the latest .Net frameworks, the windows presentation framework is gaining importance by the day. Many people are now turning to WPF controls to provide a rich user experience. I have been using WPF controls fo…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

622 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