Checks if the give class name matches the class name of the given interface element.
int IupClassMatch(Ihandle* ih, const char* classname); [in C] iup.ClassMatch(ih: ihandle, classname: string) -> (ret: boolean) [in Lua]
ih: Identifier of the interface element.
classname: name of the class to match.
Returns: true (1) if the given name matches the class name or one of its parent class names, false (0) or else.