Public Overrides Function Format( _
   ByVal o As Object _
) As String

Dim instance As CheckBoxCellType
Dim o As Object
Dim value As String
 
value = instance.Format(o)

public override string Format( 
   object o
)

[Serializable()]
class myCheck:FarPoint.Web.Spread.CheckBoxCellType
{
Public myCheck(string img1,string img2)
{
Base.CheckedImageUrl=img1;
Base.UncheckedImageUrl=img2;
}

Public override string Format(object o)
{
return Base.Format(o);
}

Public override Control GetEditorControl(string id,TableCell tc,FarPoint.Web.Spread.Appearance style,FarPoint.Web.Spread.Inset margin,object v,bool ul)
{
return Base.GetEditorControl(id,tc,style,margin,v,ul);
}

public override object GetEditorValue(Control owner,string id)
{
return Base.GetEditorValue(owner,id);
}

public override Control PaintCell(string id,TableCell tc,FarPoint.Web.Spread.Appearance style,FarPoint.Web.Spread.Inset margin,object v,bool ul)
{
return Base.PaintCell(id,tc,style,margin,v,ul);
}

public override object Parse(string s)
{
return Base.Parse(s);
}

public override bool ValidateEditorValue(object val,string outreason)
{
return Base.ValidateEditorValue(val,outreason);
}

new public bool BooleanValue
{
Get
{
return Base.BooleanValue;
}
Set
{
Base.BooleanValue=value;
}
}

Public override string EditorClientScriptUrl{Get{Return"checkboxeditor.htc";}}

Public override string RendererClientScriptUrl{Get{Return"checkboxrender.htc";}}

}

private void Page_Load(object sender, System.EventArgs e)
{
myCheckckbox= new myCheck("img/checked.gif","img/unchecked.gif");
ckbox.BooleanValue=false;
FpSpread1.ActiveSheetView.Cells[0,0].CellType=ckbox;
FpSpread1.ActiveSheetView.SetValue(0,0,1);
}

<Serializable()>
Public Class myCheck
Inherits FarPoint.Web.Spread.CheckBoxCellType

Sub New(ByVal img1 As String,ByVal img2 As String)
MyBase.CheckedImageUrl=img1
MyBase.UncheckedImageUrl=img2
End Sub

Public Overrides Function Format(ByVal o As Object)As String
Return MyBase.Format(o)
End Function

Public Overrides Function GetEditorControl(ByVal id As String,ByVal tc As TableCell,ByVal style As FarPoint.Web.Spread.Appearance,ByVal margin As FarPoint.Web.Spread.Inset,ByVal v As Object,ByVal ul As Boolean)As System.Web.UI.Control
Return MyBase.GetEditorControl(id,tc,style,margin,v,ul)
End Function

Public Overrides Function GetEditorValue(ByVal owner As Control,ByVal id As String)As Object
Return MyBase.GetEditorValue(owner,id)
End Function

Public Overrides Function PaintCell(ByVal id As String,ByVal tc As TableCell,ByVal style As FarPoint.Web.Spread.Appearance,ByVal margin As FarPoint.Web.Spread.Inset,ByVal v As Object,ByVal ul As Boolean)As System.Web.UI.Control
Return MyBase.PaintCell(id,tc,style,margin,v,ul)
End Function

Public Overrides Function Parse(ByVal s As String)As Object
Return MyBase.Parse(s)
End Function

Public Overrides Function ValidateEditorValue(ByVal val As Object,ByRef reason As String)As Boolean
Return MyBase.ValidateEditorValue(val,reason)
End Function

Public ShadowsPropertyBooleanValue()As Boolean
Get
Return MyBase.BooleanValue
EndGet
Set(ByVal Value A sBoolean)
MyBase.BooleanValue=Value
End Set
End Property

Public ShadowsPropertyCheckedImageUrl() As String
Get
Return MyBase.CheckedImageUrl
End Get
Set(ByVal Value As String)
MyBase.CheckedImageUrl=Value
End Set
End Property

Public Overrides ReadOnly PropertyEditorClientScriptUrl()As String
Get
Return"checkboxeditor.htc"
End Get
End Property

Public Overrides ReadOnly PropertyRendererClientScriptUrl()As String
Get
Return"checkboxrender.htc"
End Get
End Property

Public ShadowsPropertyUncheckedImageUrl()As String
Get
Return MyBase.UncheckedImageUrl
End Get
Set(ByVal Value As String)
MyBase.UncheckedImageUrl=Value
End Set
End Property

End Class

Private Sub Page_Load(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles MyBase.Load
Dim ckbox As New myCheck("img\checked.gif","img\unchecked.gif")
ckbox.BooleanValue=False
FpSpread1.ActiveSheetView.Cells(0,0).CellType=ckbox
FpSpread1.ActiveSheetView.SetValue(0,0,1)
End Sub