Application hangs in Windows XP SP2 compatibility mode under Windows 10

Seems that WinXP SP2 compatibility mode in the new Windows 10 has some... incompatibilities. Half of the past week was spent for a struggle with a mysterious application hang. Through some experiments it was found that the hanging is a result of interaction between gdNotifierThread and assigned notifier window. Although an update of a visual control is carried through a call of Synchronize method the whole application becomes unresponsive. The problem was solved by replacement of Synchronize call with sending a custom message using PostMessage function.

One could ask what is the reason in running Gedemin in a compatibility mode in the first place. Well, this is quick and dirty solution to make Gedemin's windows look good. Newest Windows 10 display theme looks weird with a windows and dialog boxes designed in the times when Ctl3D was a first class fashion.