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How to implement chart - Cairo/RC5 or other?

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Hey

I need to implement a chart in my VB6 app. Specifically, it is a "child growth chart" like the one from the World Health Organization - see attachment.

I use Microsoft Chart Control 6.0 in my app, but the experience is always wholly unpleasant, and the results looks nothing short of the 90s.

I saw Schmidt's RC5 uses Cairo and that means modern graphics, however there is no documentation for RC5 and the front page of the RC5 website hasn't been updated since 2013. Since implementing this chart will require learning whatever library I use, I don't really want to invest in a project that seems to have been dead for close to a decade, unless it's that great and worth it.

1. Is there a way of using Cairo without needing to use RC5?
2. Is there a simple alternative solution to implementing a modern-looking graph?
3. Is RC5 actively maintained?
4. The RC5 website has no documentation (tutorial != documentation) and does not explain what each of the 5 DLLs do. I want a minimal setup to draw graphs using cairo - which DLLs would I have to use?

Kind regards
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