Dialogex bug on minimize

[Solmos]

if minimize aplication and is show the dialog, the aplication not is posible restore.

[reteset]

this is not a bug

once you open a (modal) dialog it disables its parent window and minimize,maximize,close buttons also

in your example ,you are minimizing main window while it is disabled
in this case Sysmenu is disabled also
so your application is not responding,because it is disabled/locked

best ways are :
do not minimize main window when a modal dialog is opened
close sub dialogs before minimize application

finally ,user already can not minimize main window
if you do not provide a button or samething similar with
Application.Minimize();