Quote Originally Posted by Krool View Post
Pressing F4 to hide drop-down list.
I should press F4 three times:
  • The first one it will be *ReasonInitialize
  • On the second one the drop-down list will be closed
  • And only after the third time I press F4 it will cause the *ReasonKeyboard.


Quote Originally Posted by Krool View Post
Or clicking on the combo button to close the list.
Not "to close", but "to open it again". The same as with F4.

Quote Originally Posted by Krool View Post
Or clicking on the edit control.
Nothing happens.

Quote Originally Posted by Krool View Post
Then you are "initialized" and any further ComboBeforeDropDown will give you ReasonMouse or ReasonKeyboard.
Yes, but we usually don't work that way with ComboBoxes.