Public ReadOnly Property SubEditor As Control

Dim instance As SubEditorOpeningEventArgs
Dim value As Control
 
value = instance.SubEditor

public Control SubEditor {get;}

public class mySubEd : Form, FarPoint.Win.Spread.CellType.ISubEditor
{
public event EventHandler ValueChanged;
public event EventHandler CloseUp;
private TextBox txt = null;
private Button BtnOk = null;
private Button BtnCancel = null;

public mySubEd()
{
FormBorderStyle = FormBorderStyle.FixedSingle;
MaximizeBox = false;
MinimizeBox = false;
ControlBox = false;
txt = new TextBox();
BtnOk = new Button();
BtnCancel = new Button();
txt.Location = new Point(0, 0);
txt.Size = new Size(110, 200);
txt.ForeColor = Color.Red;
BtnOk.Location = new Point(3, 75);
BtnOk.Size = new Size(50, 25);
BtnOk.Text = "OK";
BtnOk.ForeColor = Color.Red;
BtnCancel.Location = new Point(57, 75);
BtnCancel.Size = new Size(50, 25);
BtnCancel.Text = "Cancel";
BtnCancel.ForeColor = Color.Red;
Controls.Add(txt);
Controls.Add(BtnOk);
Controls.Add(BtnCancel);
Text = "Editor";
BtnOk.Click += new EventHandler(OKClicked);
BtnCancel.Click += new EventHandler(CancelClicked);
txt.TextChanged += new EventHandler(txtTextChanged);
}

private void OKClicked(object sender, EventArgs e)
{
if (ValueChanged != null)
ValueChanged(this, EventArgs.Empty);
if (CloseUp != null)
CloseUp(this, EventArgs.Empty);
}

private void CancelClicked(object sender, EventArgs e)
{
if (CloseUp != null)
CloseUp(this, EventArgs.Empty);
}

private void txtTextChanged(object sender, EventArgs e)
{
Text = txt.Text;
}

public Point GetLocation(Rectangle rect)
{
Point pt = new Point(0);
Size sz = GetPreferredSize();
pt.Y = (Screen.PrimaryScreen.WorkingArea.Height/2) - (sz.Height/2);
pt.X = (Screen.PrimaryScreen.WorkingArea.Width/2) - (sz.Width/2);
return pt;
}
public Control GetSubEditorControl()
{
return this;
}
public object GetValue()
{
return txt.Text;
}
public void SetValue(object value)
{
value = txt.Text;
}
public Size GetPreferredSize()
{
return new Size(115, 130);
}
}

private void Form1Load(object sender, System.EventArgs e)
{
FarPoint.Win.Spread.CellType.TextCellType t = new FarPoint.Win.Spread.CellType.TextCellType();
t.SubEditor = new mySubEd();
fpSpread1.ActiveSheet.Cells[0, 0].CellType = t;
}

private void fpSpread1SubEditorOpen(object sender, FarPoint.Win.Spread.SubEditorOpeningEventArgs e) 
{
textBox1.Text = e.SubEditor.ToString();
}

Public Class mySubEd
Inherits Form
Implements FarPoint.Win.Spread.CellType.ISubEditor

Public Event CloseUp(ByVal sender As Object, ByVal e As EventArgs) Implements FarPoint.Win.Spread.CellType.ISubEditor.CloseUp
Public Event ValueChanged(ByVal sender As Object, ByVal e As EventArgs) Implements FarPoint.Win.Spread.CellType.ISubEditor.ValueChanged
Private BtnOk As Button = Nothing
Private BtnCancel As Button = Nothing
Private txt As TextBox = Nothing

Public Sub New()
FormBorderStyle = FormBorderStyle.FixedSingle
MaximizeBox = False
MinimizeBox = False
ControlBox = False
txt = New TextBox
BtnOk = New Button
BtnCancel = New Button
txt.Location = New Point(0, 0)
txt.Size = New Size(110, 200)
txt.ForeColor = Color.Red
BtnOk.Location = New Point(3, 75)
BtnOk.Size = New Size(50, 25)
BtnOk.Text = "OK"
BtnOk.ForeColor = Color.Red
BtnCancel.Location = New Point(57, 75)
BtnCancel.Size = New Size(50, 25)
BtnCancel.Text = "Cancel"
BtnCancel.ForeColor = Color.Red
Controls.Add(txt)
Controls.Add(BtnOk)
Controls.Add(BtnCancel)
Text = "Editor"
AddHandler BtnOk.Click, AddressOf OKClicked
AddHandler BtnCancel.Click, AddressOf CloseClicked
AddHandler txt.TextChanged, AddressOf txtTextChanged
End Sub

Private Sub OKClicked(ByVal sender As Object, ByVal e As EventArgs)
RaiseEvent ValueChanged(Me, EventArgs.Empty)
RaiseEvent CloseUp(Me, EventArgs.Empty)
End Sub

Private Sub CloseClicked(ByVal sender As Object, ByVal e As EventArgs)
RaiseEvent CloseUp(Me, EventArgs.Empty)
End Sub

Private Sub txtTextChanged(ByVal sender As Object, ByVal e As EventArgs)
Text = txt.Text
End Sub

Public Function GetLocation(ByVal rect As Rectangle) As Point Implements FarPoint.Win.Spread.CellType.ISubEditor.GetLocation
Dim pt As New Point(0)
Dim sz As Size = GetPreferredSize()
pt.Y = (Screen.PrimaryScreen.WorkingArea.Height / 2) - (sz.Height / 2)
pt.X = (Screen.PrimaryScreen.WorkingArea.Width / 2) - (sz.Width / 2)
Return pt
End Function

Public Function GetPreferredSize() As Size Implements FarPoint.Win.Spread.CellType.ISubEditor.GetPreferredSize
Return New Size(115, 130)
End Function

Public Function GetSubEditorControl() As Control Implements FarPoint.Win.Spread.CellType.ISubEditor.GetSubEditorControl
Return Me
End Function

Public Function GetValue() As Object Implements FarPoint.Win.Spread.CellType.ISubEditor.GetValue
Return txt.Text
End Function

Public Sub SetValue(ByVal value As Object) Implements FarPoint.Win.Spread.CellType.ISubEditor.SetValue
value = txt.Text
End Sub
End Class

Private Sub Form1Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Dim t As New FarPoint.Win.Spread.CellType.TextCellType
t.SubEditor = New mySubEd
FpSpread1.ActiveSheet.Cells(0, 0).CellType = t

End Sub

Private Sub FpSpread1SubEditorOpen(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.SubEditorOpeningEventArgs) Handles
FpSpread1.SubEditorOpen
TextBox1.Text = e.SubEditor.ToString()
End Sub