A ColU that specifies the zero-based index of the last column in the range. The value MUST be greater than or equal to colFirst, and MUST be less than or equal to 0x00FF.
public short colLast {get; set;}
'Declaration
Public Property colLast As Short
'Usage
Dim instance As Ref8U
Dim value As Short
instance.colLast = value
value = instance.colLast