Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

How to determine color of a button programmatically?

Posted on 2002-07-16
11
Medium Priority
?
243 Views
Last Modified: 2010-04-01
I have a handle to a button. How do I get color of a botton?
0
Comment
Question by:petlev
  • 5
  • 3
  • 2
  • +1
11 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 7157314
Assuming that you are talking Win32 here:

HDC hDC = GetDC ( hButton);

COLORREF cr = GetBkColor ( hDC);

ReleaseDC ( hDC);
0
 
LVL 86

Accepted Solution

by:
jkr earned 800 total points
ID: 7157320
BTW: You can retrieve the color information about any point of the screen using 'GetPixel()'
0
 
LVL 8

Expert Comment

by:fl0yd
ID: 7158292
One thing to add: Do you want the color of a specific button (since you explicitly stated having a handle, one would have to assume so) or the color of buttons in general. If the latter is the case, you can use:
COLORREF crBtn = GetSysColor( COLOR_BTNFACE );
or if you want to use it as a brush:
HBRUSH hbrBtn = GetSysColorBrush( COLOR_BTNFACE );
Since this is a system brush you won't have to call DeleteObject( hbrBtn ); when you're done with it.
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 31

Expert Comment

by:Zoppo
ID: 7158839
Addition to jkr's suggestion: If maybe the button's color is
modified by the app you may need to send a WM_CTLCOLORBTN to
the button's parent before the GetBkColor().

0
 

Author Comment

by:petlev
ID: 7194013
By using GetBkColor() I get same result no matter what background color is.
0
 
LVL 86

Expert Comment

by:jkr
ID: 7275593
Thanks, but why did you accept my comment as an answer and graded a "C" then? If it did not help, it is not an answer...
0
 

Author Comment

by:petlev
ID: 7277740
jkr,
I accepted your comment as an answer because 'GetPixel()' function seems to be the only way to get a background color in my case. I gave you "C" because you did not offer any code.
Thanks!
0
 
LVL 8

Expert Comment

by:fl0yd
ID: 7277749
WTF?!? How much more code do you need?!? And where exactly does it say so in your question, anyway? Sorry, I just got a bit angry and had to get it out.

.f
0
 
LVL 86

Expert Comment

by:jkr
ID: 7281093
>>I gave you "C" because you did not offer any code

Err, what exacly is unclear about a function that works in a style of

int n = multiply ( 1, 2);

?

OK, so here is your code sample.

COLORREF cr;
int nXPos;
int nYPos;
HDC hdc;

// initialize parameters

cr = GetPixel ( hdc, nXPos, nYPos);
0
 

Author Comment

by:petlev
ID: 7281251
I'm sorry if anybody is a bit angry. I am not very familiar with C++; I was not sure how to use it.
0
 
LVL 86

Expert Comment

by:jkr
ID: 7282529
Not angry - just irritated :o)
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

Written by John Humphreys C++ Threading and the POSIX Library This article will cover the basic information that you need to know in order to make use of the POSIX threading library available for C and C++ on UNIX and most Linux systems.   [s…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.
Suggested Courses

972 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