[Bug 58630] New: Monthcalendar shows wrong weeknumbers (.NET 4.8 application)

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58630

Bug ID: 58630
           Summary: Monthcalendar shows wrong weeknumbers (.NET 4.8
                    application)
           Product: Wine
           Version: 10.13
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: comctl32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 79186
  --> http://bugs.winehq.org/attachment.cgi?id=79186
open Monthcalender - "53" should be "1" in Germany.

At monthcalendar control (and even on a modified datetimepicker control, which
uses MCS_weeknumbers), calculation of weeknumbers seems to ignore
region-settings.

See attachments.