DatagridBoolColumn

[Hole-In-One]

This will add a new bool checkbox column to your data grid then check the value of the "password" column and check the checkbox if the rows password="145":

 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Add a new check box column to your datagrid" 
        ds1.Tables(0).Columns.Add(New DataColumn("calculatedField", GetType(Boolean)))

        'Set the default value to false "Unchecked" 
        ds1.Tables(0).Columns("calculatedField").DefaultValue = False

         'Fill your dataset 
        da1.Fill(ds1)

         'Check your new column if the rows "password" column = 145 
        Dim i As Integer
        With ds1.Tables(0)
            For i = 0 To .Rows.Count - 1
                If .Rows(i)("Password") = "145" Then
                    .Rows(i)("calculatedField") = True
                End If
            Next
        End With
    End Sub