Kvaz1r a23b3783b6 Add precondition checks to operations in the listctrl sample ...

Avoid showing assert failures in debug builds if a menu item not
applicable in the current state is selected and just show an error
instead.

Closes #18572.

Closes https://github.com/wxWidgets/wxWidgets/pull/1694

2020-01-06 00:47:26 +01:00

45 KiB

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