Please Change in Methode
TCustomElComboBox.WMKillFocus
the line
if LMDSIWindowsVistaUp then
to
if LMDSIWindowsVistaUp and Assigned(FButton) then
We had the problem that closing a form with focused ComboBox will cause a 0-Pointer exception without this extra check.
The FButton was released befor receiving the WMKillFocus-Event.
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