property ExFileView.ColumnsAllowSizing as Boolean
Retrieves or sets a value that indicates whether a user can resize columns at run-time.

TypeDescription
Boolean A Boolean expression that indicates whether a user can resize columns at run-time. 
By default, the ColumnsAllowSizing property is False. The ColumnsAllowSizing is used to specify whether the user can resize the columns in the list section as well, not only on the header. If this is true, you can have the cursor between columns not necessary into the header also in the list section. If False, the user still can resize the columns using the header of the control. Use the HeaderVisible property to show or hide the control's header bar. The HeaderAppearance property specifies the appearance of the column in the control's header bar.