The following parts of the msctls_trackbar32 API (Windows 10) are not used:

Control styles:
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Messages:
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- TBM_GETTIC (https://msdn.microsoft.com/en-us/library/bb760205.aspx)
	-> currently we have no use for this message
- TBM_SETPOSNOTIFY (https://msdn.microsoft.com/en-us/library/dd318034.aspx)
	-> requires Windows 7 or newer
	-> not clear what it is doing