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Old 11-14-2019, 11:23 AM   #6
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Join Date: Feb 2019
Location: England
Posts: 404

Originally Posted by mespotine View Post
Unfortunately no. You can make the whole window transparent, but not one single color.

reaper.JS_Window_SetOpacity( windowHWND, mode, value )

mode: either "ALPHA" or "COLOR".
value: If ALPHA, the specified value may range from zero to one, and will apply to the entire window.
If COLOR, value specifies a 0xRRGGBB color, and all pixels in this color will be made transparent. (All mouse clicks over transparent pixels will pass through, too).

WARNING: COLOR mode is only available in Windows, not Linux or macOS.

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