Get the color of a pixel

This is a discussion on Get the color of a pixel within the Windows Programming forums, part of the Platform Specific Boards category; How can I get the color of a pixel on the screen? Not on my application, anywhere on the screen. ...

  1. #1
    Reverse Engineer maxorator's Avatar
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    Get the color of a pixel

    How can I get the color of a pixel on the screen? Not on my application, anywhere on the screen.
    I know I have to use GetPixel, but how do I get the device context, that includes everything on the screen?

    C++, Win32, Dev-C++

  2. #2
    int x = *((int *) NULL); Cactus_Hugger's Avatar
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    You can open the display as a DC:
    Code:
    CreateDC("DISPLAY", NULL, NULL, NULL);
    long time; /* know C? */
    Unprecedented performance: Nothing ever ran this slow before.
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    Real Programmers confuse Halloween and Christmas, because dec 25 == oct 31.
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  3. #3
    carry on JaWiB's Avatar
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    You can use GetDC and pass NULL as its parameter
    "Think not but that I know these things; or think
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  4. #4
    Reverse Engineer maxorator's Avatar
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    Thanks, I'll test these as soon as I can.

  5. #5
    The superhaterodyne twomers's Avatar
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    Perhaps the GetPixel() function? This is a link to something I did before. Look at it, and modify it to your needs -

    Just wondering

  6. #6
    Registered User Queatrix's Avatar
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    >> how do I get the device context, that includes everything on the screen?

    Code:
    GetDC(HWND_DESKTOP);
    // stupid code tags

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