?
Solved

Reading color from screen

Posted on 1997-07-17
2
Medium Priority
?
174 Views
Last Modified: 2012-05-04
Using Visual Basic 5, how can I find out what color is on
the screen at a certain coordinate, but not on a form that is part of my program, just at any given coordinate?
0
Comment
Question by:bryoung
[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
 

Accepted Solution

by:
W. Yang earned 100 total points
ID: 1428471
You need to know few api calls
GetDestopwindow: gives you the HWND of the desktop which is the screen.
GetDC: gives you the DC(a handle of a canvas) of the given HWND.
GetPixel: returns a colour of a point from the given DC.

If you know the DC of the current screen then you can use GetPixel(DesktopDC, X, Y) = a colour.

0
 

Author Comment

by:bryoung
ID: 1428472
I really need to know how to set up these API
calls, because I've never worked with them before.
This would have been a more helpful answer if I
had previous experience in setting up these API
calls, which I don't.
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

When designing a form there are several BorderStyles to choose from, all of which can be classified as either 'Fixed' or 'Sizable' and I'd guess that 'Fixed Single' or one of the other fixed types is the most popular choice. I assume it's the most p…
This article describes how to use a set of graphical playing cards to create a Draw Poker game in Excel or VB6.
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…
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…
Suggested Courses

764 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