Hi Rahul,
You can make the column width auto fit, by handling the QueryColWidth event in TableModel class. In the event, the size of the column can be changed depend on the ClientSize.
The AllowEdit property is working fine in our latest version ( 4.1.0.62 ), please refer to the sample for more details.
Sample :
ColumnWidthResizing_GGC
Let us know if this helps.
Best regards,
Madhan