getCarName likely returns a temporary. After the assignment the temporary object is destroyed and the pointer item.pszText points to invalid memory. You must ensure that the string object is valid during the call to ListView_InsertItem.
std::string text(record.getCarName()); item.iSubItem = 0; item.pszText = const_cast<LPSTR>(text.c_str()); item.iItem = 0; ListView_InsertItem(CarsListView, &item);
The const_cast is an artifact of the fact that the Windows API uses the same structure to set and retrieve information. When invoking ListView_InsertItem the structure is immutable, however there is no way to reflect that in the language.
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