Public Overridable Function Contains( _
   ByVal fcd As FilterColumnDefinition _
) As Boolean

Dim instance As FilterColumnDefinitionCollection
Dim fcd As FilterColumnDefinition
Dim value As Boolean
 
value = instance.Contains(fcd)

public virtual bool Contains( 
   FilterColumnDefinition fcd
)

FarPoint.Win.Spread.FilterColumnDefinitionCollection fcdc = new FarPoint.Win.Spread.FilterColumnDefinitionCollection();
FarPoint.Win.Spread.NamedStyle instyle = new FarPoint.Win.Spread.NamedStyle();
FarPoint.Win.Spread.NamedStyle outstyle = new FarPoint.Win.Spread.NamedStyle();
instyle.BackColor = Color.Yellow;
outstyle.BackColor = Color.Aquamarine;
FarPoint.Win.Spread.FilterColumnDefinition fcd = new FarPoint.Win.Spread.FilterColumnDefinition(1, FarPoint.Win.Spread.FilterListBehavior.SortByMostOccurrences
|  
FarPoint.Win.Spread.FilterListBehavior.Default);
FarPoint.Win.Spread.FilterColumnDefinition fcd1 = new FarPoint.Win.Spread.FilterColumnDefinition(2, FarPoint.Win.Spread.FilterListBehavior.Default);
FarPoint.Win.Spread.FilterColumnDefinition fcd2 = new FarPoint.Win.Spread.FilterColumnDefinition(3);
fcdc.Add(fcd);
fcdc.Add(fcd1);
fcdc.Add(fcd2);
FarPoint.Win.Spread.StyleRowFilter sf = new FarPoint.Win.Spread.StyleRowFilter(fpSpread1.ActiveSheet, instyle, outstyle);
foreach(FarPoint.Win.Spread.FilterColumnDefinition x in fcdc)
{
sf.AddColumn(x);
}
fpSpread1.ActiveSheet.RowFilter = sf;

bool b;
foreach(FarPoint.Win.Spread.FilterColumnDefinition fc in fcdc)
{
b = fcdc.Contains(fc);
if (b == true)
{
MessageBox.Show("Column " + fc.ColumnIndex.ToString() + " has a filter on it.");
}
}

Dim instyle As New FarPoint.Win.Spread.NamedStyle
Dim outstyle As New FarPoint.Win.Spread.NamedStyle
instyle.BackColor = Color.Yellow
outstyle.BackColor = Color.Aquamarine

Dim fcdc As New FarPoint.Win.Spread.FilterColumnDefinitionCollection
Dim fcd As New FarPoint.Win.Spread.FilterColumnDefinition(1, FarPoint.Win.Spread.FilterListBehavior.SortByMostOccurrences
Or FarPoint.Win.Spread.FilterListBehavior.Default)
Dim fcd1 As New FarPoint.Win.Spread.FilterColumnDefinition(2, FarPoint.Win.Spread.FilterListBehavior.Default)
Dim fcd2 As New FarPoint.Win.Spread.FilterColumnDefinition(3)
fcdc.Add(fcd)
fcdc.Add(fcd1)
fcdc.Add(fcd2)

Dim sf As New FarPoint.Win.Spread.StyleRowFilter(fpSpread1.ActiveSheet, instyle, outstyle)
Dim x As FarPoint.Win.Spread.FilterColumnDefinition
For Each x In fcdc
sf.AddColumn(x)
Next
fpSpread1.ActiveSheet.RowFilter = sf

Dim b As Boolean
Dim fc As FarPoint.Win.Spread.FilterColumnDefinition
For Each fc In fcdc
b = fcdc.Contains(fc)
If b = True Then
MessageBox.Show("Column " & fc.ColumnIndex.ToString() & " has a filter on it.")
End If
Next