Dimitri,
The missing last column in newsbin seems to be caused by this line:
| if (!lpColumn || nColumn < 0 || nColumn > infoPtr->hdpaColumns->nItemCount) return -1; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
removing the marked part of the test result in a couple of error messages:
| err:listview:LISTVIEW_InsertColumnT nColumn=4, nNewColumn=3 | err:listview:LISTVIEW_InsertColumnT nColumn=4, nNewColumn=3 | err:listview:LISTVIEW_InsertColumnT nColumn=4, nNewColumn=3
but otherwise runs fine.
Do you see any objections removing the test and error message?
Rein.