"transfering" info from one form to another witout using IsMDIContainer prop

Hi, Here is the code I have implemented: FIRST FORM ======== using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using CustomFunction; namespace MyCalculator { ///

/// Summary description for editFormor. ///

public class Editor : Form { private System.Windows.Forms.Label label1; private System.Windows.Forms.GroupBox groupBox1; private System.Windows.Forms.Label label2; private System.Windows.Forms.ComboBox comboBoxFunctions; private System.Windows.Forms.Button btnExit; private System.Windows.Forms.Label label3; private System.Windows.Forms.TextBox textBoxFunction; private System.Windows.Forms.DataGrid dataGridSymbolTable; private System.Windows.Forms.TextBox textBoxResult; ///

/// Required designer variable. ///

private System.ComponentModel.Container components = null; private System.Windows.Forms.Label label4; private System.Windows.Forms.ComboBox comboBoxValues; private System.Windows.Forms.Button btnParse; private System.Windows.Forms.Button btnEval; private System.Windows.Forms.GroupBox groupBox2; private System.Windows.Forms.ComboBox comboBoxUserFunctions; private System.Windows.Forms.Label label6; private System.Windows.Forms.Button btnSave; private System.Windows.Forms.Button btnEdit; private System.Windows.Forms.Button btnDelete; private DataSet m_dataSet = new DataSet("DataSet"); private DataTable m_dataTable = new DataTable("Variables"); private Function myCustFunc = new Function(); public Function MyCustFunc { get { return myCustFunc; } set { myCustFunc = value; } } private bool isParsed = false; public bool IsParsed { get { return isParsed; } set { isParsed = value; } } //DeleteForm myDeleteForm = new DeleteForm(); //EditForm myEditForm = new EditForm(); public Editor() { // // Required for Windows Form Designer support // InitializeComponent(); DataColumn name = new DataColumn("Name",typeof(string)); DataColumn dValue = new DataColumn("Value",typeof(double)); name.ReadOnly = true; name.AllowDBNull = false; m_dataTable.Columns.Add(name); m_dataTable.Columns.Add(dValue); m_dataSet.Tables.Add(m_dataTable); // // TODO: Add any constructor code after InitializeComponent call // } ///

/// Clean up any resources being used. ///

protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code ///

/// Required method for Designer support - do not modify /// the contents of this method with the code editor. ///

private void InitializeComponent() { this.label1 = new System.Windows.Forms.Label(); this.textBoxFunction = new System.Windows.Forms.TextBox(); this.groupBox1 = new System.Windows.Forms.GroupBox(); this.comboBoxValues = new System.Windows.Forms.ComboBox(); this.label4 = new System.Windows.Forms.Label(); this.comboBoxFunctions = new System.Windows.Forms.ComboBox(); this.label2 = new System.Windows.Forms.Label(); this.btnParse = new System.Windows.Forms.Button(); this.btnExit = new System.Windows.Forms.Button(); this.dataGridSymbolTable = new System.Windows.Forms.DataGrid(); this.textBoxResult = new System.Windows.Forms.TextBox(); this.label3 = new System.Windows.Forms.Label(); this.btnEval = new System.Windows.Forms.Button(); this.groupBox2 = new System.Windows.Forms.GroupBox(); this.btnDelete = new System.Windows.Forms.Button(); this.btnEdit = new System.Windows.Forms.Button(); this.btnSave = new System.Windows.Forms.Button(); this.comboBoxUserFunctions = new System.Windows.Forms.ComboBox(); this.label6 = new System.Windows.Forms.Label(); this.groupBox1.SuspendLayout(); ((System.ComponentModel.ISupportInitialize)(this.dataGridSymbolTable)).BeginInit(); this.groupBox2.SuspendLayout(); this.SuspendLayout(); // // label1 // this.label1.BackColor = System.Drawing.Color.Transparent; this.label1.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.label1.ForeColor = System.Drawing.SystemColors.ControlText; this.label1.Location = new System.Drawing.Point(48, 40); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(136, 16); this.label1.TabIndex = 0; this.label1.Text = "Enter compound function"; // // textBoxFunction // this.textBoxFunction.Location = new System.Drawing.Point(48, 72); this.textBoxFunction.Name = "textBoxFunction"; this.textBoxFunction.Size = new System.Drawing.Size(272, 20); this.textBoxFunction.TabIndex = 1; this.textBoxFunction.Text = ""; this.textBoxFunction.TextChanged += new System.EventHandler(this.textBoxFunction_TextChanged); // // groupBox1 // this.groupBox1.BackColor = System.Drawing.Color.Transparent; this.groupBox1.Controls.Add(this.comboBoxValues); this.groupBox1.Controls.Add(this.label4); this.groupBox1.Controls.Add(this.comboBoxFunctions); this.groupBox1.Controls.Add(this.label2); this.groupBox1.Controls.Add(this.btnParse); this.groupBox1.Controls.Add(this.btnEval); this.groupBox1.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.groupBox1.ForeColor = System.Drawing.SystemColors.ControlText; this.groupBox1.Location = new System.Drawing.Point(48, 120); this.groupBox1.Name = "groupBox1"; this.groupBox1.Size = new System.Drawing.Size(216, 216); this.groupBox1.TabIndex = 2; this.groupBox1.TabStop = false; this.groupBox1.Text = "Custom Functions"; // // comboBoxValues // this.comboBoxValues.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList; this.comboBoxValues.Items.AddRange(new object[] { "pi", "e"}); this.comboBoxValues.Location = new System.Drawing.Point(16, 128); this.comboBoxValues.Name = "comboBoxValues"; this.comboBoxValues.Size = new System.Drawing.Size(128, 22); this.comboBoxValues.TabIndex = 3; this.comboBoxValues.SelectedIndexChanged += new System.EventHandler(this.comboBoxValues_SelectedIndexChanged); // // label4 // this.label4.Location = new System.Drawing.Point(16, 104); this.label4.Name = "label4"; this.label4.Size = new System.Drawing.Size(176, 16); this.label4.TabIndex = 2; this.label4.Text = "Choose wanted values from here"; // // comboBoxFunctions // this.comboBoxFunctions.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList; this.comboBoxFunctions.Items.AddRange(new object[] { "sin", "cos", "tan", "cotan", "sinh", "cosh", "tanh", "cotanh", "asin", "acos", "atan", "acotan", "abs", "exp", "ln", "log10", "log", "sqrt"}); this.comboBoxFunctions.Location = new System.Drawing.Point(16, 64); this.comboBoxFunctions.Name = "comboBoxFunctions"; this.comboBoxFunctions.Size = new System.Drawing.Size(128, 22); this.comboBoxFunctions.TabIndex = 1; this.comboBoxFunctions.SelectedIndexChanged += new System.EventHandler(this.comboBoxFunctions_SelectedIndexChanged); // // label2 // this.label2.Location = new System.Drawing.Point(16, 32); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(176, 16); this.label2.TabIndex = 0; this.label2.Text = "Choose wanted textBoxFunctions from here"; // // btnParse // this.btnParse.BackColor = System.Drawing.Color.Transparent; this.btnParse.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnParse.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.btnParse.ForeColor = System.Drawing.Color.SeaGreen; this.btnParse.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnParse.Location = new System.Drawing.Point(16, 176); this.btnParse.Name = "btnParse"; this.btnParse.Size = new System.Drawing.Size(64, 23); this.btnParse.TabIndex = 67; this.btnParse.Text = "Parse"; this.btnParse.Click += new System.EventHandler(this.btnParse_Click); // // btnExit // this.btnExit.BackColor = System.Drawing.Color.Transparent; this.btnExit.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnExit.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.btnExit.ForeColor = System.Drawing.Color.SeaGreen; this.btnExit.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnExit.Location = new System.Drawing.Point(432, 528); this.btnExit.Name = "btnExit"; this.btnExit.Size = new System.Drawing.Size(64, 23); this.btnExit.TabIndex = 68; this.btnExit.Text = "Exit"; this.btnExit.Click += new System.EventHandler(this.btnExit_Click); // // dataGridSymbolTable // this.dataGridSymbolTable.DataMember = ""; this.dataGridSymbolTable.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.dataGridSymbolTable.Location = new System.Drawing.Point(48, 440); this.dataGridSymbolTable.Name = "dataGridSymbolTable"; this.dataGridSymbolTable.PreferredColumnWidth = 118; this.dataGridSymbolTable.Size = new System.Drawing.Size(272, 112); this.dataGridSymbolTable.TabIndex = 69; // // textBoxResult // this.textBoxResult.Location = new System.Drawing.Point(48, 392); this.textBoxResult.Name = "textBoxResult"; this.textBoxResult.Size = new System.Drawing.Size(272, 20); this.textBoxResult.TabIndex = 70; this.textBoxResult.Text = ""; // // label3 // this.label3.BackColor = System.Drawing.Color.Transparent; this.label3.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.label3.ForeColor = System.Drawing.SystemColors.ControlText; this.label3.Location = new System.Drawing.Point(48, 352); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(48, 16); this.label3.TabIndex = 71; this.label3.Text = "Result"; // // btnEval // this.btnEval.BackColor = System.Drawing.Color.Transparent; this.btnEval.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnEval.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.btnEval.ForeColor = System.Drawing.Color.SeaGreen; this.btnEval.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnEval.Location = new System.Drawing.Point(120, 176); this.btnEval.Name = "btnEval"; this.btnEval.Size = new System.Drawing.Size(64, 23); this.btnEval.TabIndex = 72; this.btnEval.Text = "Evaluate"; this.btnEval.Click += new System.EventHandler(this.btnEval_Click); // // groupBox2 // this.groupBox2.BackColor = System.Drawing.Color.Transparent; this.groupBox2.Controls.Add(this.btnDelete); this.groupBox2.Controls.Add(this.btnEdit); this.groupBox2.Controls.Add(this.btnSave); this.groupBox2.Controls.Add(this.comboBoxUserFunctions); this.groupBox2.Controls.Add(this.label6); this.groupBox2.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.groupBox2.ForeColor = System.Drawing.SystemColors.ControlText; this.groupBox2.Location = new System.Drawing.Point(288, 120); this.groupBox2.Name = "groupBox2"; this.groupBox2.Size = new System.Drawing.Size(216, 216); this.groupBox2.TabIndex = 73; this.groupBox2.TabStop = false; this.groupBox2.Text = "Edit Functions"; // // btnDelete // this.btnDelete.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnDelete.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.btnDelete.ForeColor = System.Drawing.Color.SeaGreen; this.btnDelete.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnDelete.Location = new System.Drawing.Point(128, 128); this.btnDelete.Name = "btnDelete"; this.btnDelete.Size = new System.Drawing.Size(64, 23); this.btnDelete.TabIndex = 75; this.btnDelete.Text = "Delete"; this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click); // // btnEdit // this.btnEdit.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnEdit.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.btnEdit.ForeColor = System.Drawing.Color.SeaGreen; this.btnEdit.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnEdit.Location = new System.Drawing.Point(72, 176); this.btnEdit.Name = "btnEdit"; this.btnEdit.Size = new System.Drawing.Size(64, 23); this.btnEdit.TabIndex = 74; this.btnEdit.Text = "Edit"; this.btnEdit.Click += new System.EventHandler(this.btnEdit_Click); // // btnSave // this.btnSave.BackColor = System.Drawing.Color.Transparent; this.btnSave.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnSave.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.btnSave.ForeColor = System.Drawing.Color.SeaGreen; this.btnSave.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnSave.Location = new System.Drawing.Point(16, 128); this.btnSave.Name = "btnSave"; this.btnSave.Size = new System.Drawing.Size(64, 23); this.btnSave.TabIndex = 73; this.btnSave.Text = "Save"; this.btnSave.Click += new System.EventHandler(this.btnSave_Click); // // comboBoxUserFunctions // this.comboBoxUserFunctions.Cursor = System.Windows.Forms.Cursors.Arrow; this.comboBoxUserFunctions.Location = new System.Drawing.Point(16, 80); this.comboBoxUserFunctions.Name = "comboBoxUserFunctions"; this.comboBoxUserFunctions.Size = new System.Drawing.Size(176, 22); this.comboBoxUserFunctions.TabIndex = 1; // // label6 // this.label6.Location = new System.Drawing.Point(16, 40); this.label6.Name = "label6"; this.label6.Size = new System.Drawing.Size(192, 16); this.label6.TabIndex = 0; this.label6.Text = "Save the functions you defined here"; // // Editor // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.BackColor = System.Drawing.Color.Wheat; this.ClientSize = new System.Drawing.Size(528, 587); this.Controls.Add(this.groupBox2); this.Controls.Add(this.label3); this.Controls.Add(this.textBoxResult); this.Controls.Add(this.dataGridSymbolTable); this.Controls.Add(this.btnExit); this.Controls.Add(this.groupBox1); this.Controls.Add(this.textBoxFunction); this.Controls.Add(this.label1); this.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.ForeColor = System.Drawing.SystemColors.ControlText; this.Name = "Editor"; this.Text = "CompoundFunctionsCalculator"; this.Load += new System.EventHandler(this.Editor_Load); this.groupBox1.ResumeLayout(false); ((System.ComponentModel.ISupportInitialize)(this.dataGridSymbolTable)).EndInit(); this.groupBox2.ResumeLayout(false); this.ResumeLayout(false); } #endregion private void comboBoxFunctions_SelectedIndexChanged(object sender, System.EventArgs e) { if (comboBoxFunctions.SelectedIndex != -1) textBoxFunction.Text += comboBoxFunctions.SelectedItem.ToString() + "(" ; } private void btnParse_Click(object sender, System.EventArgs e) { IsParsed = true; myCustFunc.Parse(textBoxFunction.Text); myCustFunc.InfixToPostfix(); ArrayList var = myCustFunc.Variables; DataRow row; m_dataTable.Rows.Clear(); foreach(Symbol sym in var) { row = m_dataTable.NewRow(); row["Name"] = sym.m_name; row["Value"] = sym.m_value; m_dataTable.Rows.Add(row); } dataGridSymbolTable.SetDataBinding(m_dataSet,"Variables"); } private void btnEval_Click(object sender, System.EventArgs e) { if(!IsParsed) { MessageBox.Show("You must click the Parse button first."); return; } ArrayList var = new ArrayList(); Symbol sym; foreach(DataRow row in m_dataTable.Rows) { sym.m_name = (string)row["Name"]; sym.m_value = (double)row["Value"]; sym.m_type = CustomFunction.Type.Variable; var.Add(sym); } myCustFunc.Variables = var; myCustFunc.EvaluatePostfix(); if(myCustFunc.Error) { MessageBox.Show(myCustFunc.ErrorDescription); return; } textBoxResult.Text = myCustFunc.Result.ToString(); } private void textBoxFunction_TextChanged(object sender, System.EventArgs e) { IsParsed = false; } private void comboBoxValues_SelectedIndexChanged(object sender, System.EventArgs e) { if (comboBoxValues.SelectedIndex != -1) textBoxFunction.Text += comboBoxValues.SelectedItem.ToString(); } private void btnExit_Click(object sender, System.EventArgs e) { this.Hide(); //Calculator myCalc = new Calculator(); //myCalc.Show(); } private void btnSave_Click(object sender, System.EventArgs e) { Button btn = sender as Button; if (textBoxFunction.Text == "") MessageBox.Show("You did not provide a function expression for saving !","Attention"); else if (!IsParsed) MessageBox.Show("You did not parse the function expression !","Attention"); else { SaveDeleteForm mySaveDeleteForm = new SaveDeleteForm(this); mySaveDeleteForm.Name = btn.Text; //mySaveDeleteForm.Visible = false; ShowUserFunctions(mySaveDeleteForm); } } private void btnDelete_Click(object sender, System.EventArgs e) { } private void btnEdit_Click(object sender, System.EventArgs e) { Button btn = sender as Button; if (comboBoxUserFunctions.Text == "") MessageBox.Show("Error: You did not provide a function expression for edit !"); else { SaveDeleteForm mySaveDeleteForm = new SaveDeleteForm(this); mySaveDeleteForm.Name = btn.Text; //mySaveDeleteForm.Visible = false; ShowUserFunctions(mySaveDeleteForm); } } public void ShowUserFunctions(SaveDeleteForm mySaveDelForm) { if (mySaveDelForm.Name == "Save") { mySaveDelForm.Visible = false; //mySaveDelForm.Close(); if (mySaveDelForm.ShowDialog() == DialogResult.OK) { if (!comboBoxUserFunctions.Items.Contains(mySaveDelForm.FunctionName)) comboBoxUserFunctions.Items.Add(mySaveDelForm.FunctionName); } } if (mySaveDelForm.Name == "Edit") { mySaveDelForm.Visible = false; //mySaveDelForm.Close(); if (mySaveDelForm.ShowDialog() == DialogResult.OK) { if (comboBoxUserFunctions.Items.Contains(mySaveDelForm.FunctionName)) comboBoxUserFunctions.Items.Remove(mySaveDelForm.FunctionName); comboBoxUserFunctions.Items.Add(mySaveDelForm.FunctionName); } } } private void Editor_Load(object sender, System.EventArgs e) { } } } SECOND FORM ========== using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; namespace MyCalculator { ///

/// Summary description for Save. ///

public class SaveDeleteForm : System.Windows.Forms.Form { private System.Windows.Forms.Label label1; private System.Windows.Forms.Button btnOk; private System.Windows.Forms.Button btnCancel; ///

/// Required designer variable. ///

private System.ComponentModel.Container components = null; private System.Windows.Forms.TextBox textBoxFunctionName; public string FunctionName { get { return textBoxFunctionName.Text; } set { textBoxFunctionName.Text = value; } } Editor myEditor = null; public SaveDeleteForm(Editor parent) { // // Required for Windows Form Designer support // InitializeComponent(); myEditor = parent; // // TODO: Add any constructor code after InitializeComponent call // } ///

/// Clean up any resources being used. ///

protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code ///

/// Required method for Designer support - do not modify /// the contents of this method with the code editor. ///

private void InitializeComponent() { this.label1 = new System.Windows.Forms.Label(); this.textBoxFunctionName = new System.Windows.Forms.TextBox(); this.btnOk = new System.Windows.Forms.Button(); this.btnCancel = new System.Windows.Forms.Button(); this.SuspendLayout(); // // label1 // this.label1.Location = new System.Drawing.Point(24, 24); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(160, 23); this.label1.TabIndex = 0; this.label1.Text = "Give a name for your function"; // // textBoxFunctionName // this.textBoxFunctionName.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.textBoxFunctionName.Location = new System.Drawing.Point(24, 64); this.textBoxFunctionName.Name = "textBoxFunctionName"; this.textBoxFunctionName.Size = new System.Drawing.Size(136, 20); this.textBoxFunctionName.TabIndex = 1; this.textBoxFunctionName.Text = ""; // // btnOk // this.btnOk.DialogResult = System.Windows.Forms.DialogResult.OK; this.btnOk.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnOk.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold); this.btnOk.ForeColor = System.Drawing.Color.ForestGreen; this.btnOk.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnOk.Location = new System.Drawing.Point(24, 112); this.btnOk.Name = "btnOk"; this.btnOk.Size = new System.Drawing.Size(56, 23); this.btnOk.TabIndex = 70; this.btnOk.Text = "Ok"; this.btnOk.Click += new System.EventHandler(this.btnOk_Click); // // btnCancel // this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel; this.btnCancel.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.btnCancel.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold); this.btnCancel.ForeColor = System.Drawing.Color.ForestGreen; this.btnCancel.ImeMode = System.Windows.Forms.ImeMode.NoControl; this.btnCancel.Location = new System.Drawing.Point(112, 112); this.btnCancel.Name = "btnCancel"; this.btnCancel.Size = new System.Drawing.Size(56, 23); this.btnCancel.TabIndex = 71; this.btnCancel.Text = "Cancel"; this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click); // // SaveDeleteForm // this.AcceptButton = this.btnOk; this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.BackColor = System.Drawing.Color.Wheat; this.CancelButton = this.btnCancel; this.ClientSize = new System.Drawing.Size(234, 173); this.Controls.Add(this.btnCancel); this.Controls.Add(this.btnOk); this.Controls.Add(this.textBoxFunctionName); this.Controls.Add(this.label1); this.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.Name = "SaveDeleteForm"; this.ResumeLayout(false); } #endregion private void btnOk_Click(object sender, System.EventArgs e) { btnOk.DialogResult = DialogResult.OK; myEditor.ShowUserFunctions(this); this.Close(); } private void btnCancel_Click(object sender, System.EventArgs e) { this.Close(); } } } and here is the exception I get: System.InvalidOperationException: Forms that are already displayed modally cannot be displayed as a modal dialog. Close the form before calling showDialog. I don't know why I get this exception. I must have done somethig wrong but I can't figure it out! If you could justlook over the code I provided and give me hint on how to fix this, I would be very grateful. Please forgive me for posting such a large piece of code, but I thought that you the whole code, in order to give you the hol idea. Any help, hint, idea very much appreciated. Cheers to all of you, Adisor