Pros::lcd has no memebr "register_btn0_cb"

Programming Support
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I’m not sure why I’m getting this error because it is in the documentation.

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Are you using PROS 4.0+? I found that quite a few of the functions had been updated or changed, but the documentation still covers 3.x.

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Yes, I’m using pros 4.0+

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I don’t know where the PROS 4 docs are, sorry

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Try running pros c install liblvgl in the PROS integrated terminal.

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It says its already installed

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can you send the rest of your code? there looks like there is a missing semicolon above.

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Try running pros c apply liblvgl in the PROS integrated terminal.