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Reading color from screen

Posted on 1997-07-17
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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?
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Question by:bryoung
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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.

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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.
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