combobox popupWindow's scrollbar is not released if ms up is done outside of ScrollBar Area

[blackholeearth]

at combobox popup Scrollbar,
mouse down.
while ms Down .. move mouse outside of scrollbar are
now mouse up...

when you move mouse up down inside bound of open scroll happens..

the problem is:
scrollbar has not received mouse up (if its msUpped outside of scrollBar Area)..

Video_slow_22.mp4

[blackholeearth]

Modern.Forms/src/Modern.Forms/ScrollBar.cs

Line 210 in 2a13c56

protected override void OnMouseUp (MouseEventArgs e)

in combobox .. scrollbar is not receiving msUp.

probably form is receiving msUp.

[dax-leo]

Capture API is not implemented or the author disabled it.