Hi, is there a code example for this? I am getting the same thing, I only want it to show me one particular grid but it shows me all the grids and drop downs on the form, I too am using the code in the sample, though slightly altered  ShowFormulaBuilderDialog to return true/false for my purposes shown below.

Note it also does not seem to exclude the text fields either:

Private Sub formulaBuilder_OperandInitializing(ByVal sender As Object, ByVal e As OperandInitializingEventArgs)

        Dim mvarSummarySettings As SummarySettings

        ' See if the FormulaProvider is a SummarySettings

        If (TypeOf e.FormulaProvider Is SummarySettings) Then

            mvarSummarySettings = DirectCast(e.FormulaProvider, SummarySettings)

            ' Get the source column for the Summary

            Dim summaryColumn As UltraGridColumn = mvarSummarySettings.SummaryPositionColumn

            ' It doesn't make sense for the Summary formula to use values from any

            ' other grid columns except the source column, so filter those out.

            If (TypeOf e.OperandContext Is UltraGridColumn _

                AndAlso Not e.OperandContext Is summaryColumn) Then

                e.Cancel = True

            End If

        End If

    End Sub

    ' This event fires for each function added to the list

    ' of functions in the FormulaBuilder and provides the

    ' opportunity to cancel them.

    Private Sub formulaBuilder_FunctionInitializing(ByVal sender As Object, ByVal e As FunctionInitializingEventArgs)

        ' Some of the available functions do not make sense for Integer

        ' data. So filter out functions.

        Select Case (e.Function.Category)

            Case "Information", "Logical", "TextAndData"

                e.Cancel = True

        End Select

    End Sub

    Public Function ShowFormulaBuilderDialog(ByVal formulaProvider As IFormulaProvider) As Boolean

        ' Declare a new FormulaBuilderDialog                 

        Dim mvarFormulaBuilderDialog As FormulaBuilderDialog = New FormulaBuilderDialog(formulaProvider)

        AddHandler mvarFormulaBuilderDialog.OperandInitializing, AddressOf formulaBuilder_OperandInitializing

        AddHandler mvarFormulaBuilderDialog.FunctionInitializing, AddressOf formulaBuilder_FunctionInitializing

        Try

            ' Show the dialog

            Dim dResult As DialogResult = mvarFormulaBuilderDialog.ShowDialog(Me)

            ' If the user cancelled, do nothing

            If (dResult = DialogResult.Cancel) Then Return False

            ' Apply the formula

            formulaProvider.Formula = mvarFormulaBuilderDialog.Formula

            Return True

        Finally

            ' Whatever happens, make sure we disconnect from

            ' the events

            RemoveHandler mvarFormulaBuilderDialog.OperandInitializing, AddressOf formulaBuilder_OperandInitializing

            RemoveHandler mvarFormulaBuilderDialog.FunctionInitializing, AddressOf formulaBuilder_FunctionInitializing

        End Try