Thread: Transparency

  1. #1
    Registered User
    Join Date
    Apr 2007



    Is there a function that creates for e.g. 50% transparent color?
    Is this function in windows GUI or shall I use some other interface for this?

    I am looking for some very simple function like CreateSolidBrush() or something like that.


  2. #2
    Cat without Hat CornedBee's Avatar
    Join Date
    Apr 2003
    You need the Windows Presentation Foundation to have transparent windows. Prior to that, you can mask out parts or you can copy the background and do your own alpha blending, but you can't make windows transparent.

    For simple transparent drawing, you can draw in an offscreen buffer and use AlphaBlend to copy the result to the target.
    All the buzzt!

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  3. #3
    train spotter
    Join Date
    Aug 2001
    near a computer
    Depending on what _exactly_ you want to do....

    Have a look at SetBkMode() using TRANSPARENT.
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  4. #4
    Unregistered User Yarin's Avatar
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  5. #5
    Reverse Engineer maxorator's Avatar
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  6. #6
    Registered User
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    Apr 2007
    I need the transparecy because I am creating a sort of aplication which work similarly as Windows desktop (but working with bitmaps not icons) when I click and hold the left button a rectangle should appear... When I move the mouse the rectangle should change its shape... This all works just fine but I need the rectangle to be about 50% transparent so the bitmaps under it are seen...

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