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I have a WinForm in C#, I have both BackCOlor and TransparencyKey set to color “Lime”. If I compile at this point the form is transparent. Then I added an BackgroundImage with a Lime background (#00ff00), but the Lime on the image is not transparent.
How can I get the background image to have a transparent background too?
The image I used is a .bmp
I’m pretty sure the Lime color in the picture is not identical to Lime you set as TransparencyKey.
Use ColorPicker: http://www.iconico.com/download.aspx?app=ColorPic&type=free
over your picture to see what color code the lime in the picture has: e.g. #XXXXXX.
Then put that number in TransparencyKey, don’t just use “Lime”.