Hi, It is true, but not in that context. There SELECTION_CB must be defined.
Best, Scuri Em qua., 15 de jan. de 2020 às 09:39, Ranier Vilela <ranier_...@hotmail.com> escreveu: > Hi, > > IupGetCallback function can return NULL, therefore it is necessary to > check the return. > > best regards, > Ranier Vilela_______________________________________________ > Iup-users mailing list > Iup-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iup-users >
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