I want to create dynamic tabPages in TabControl. In each tabPage I create dataGridView and i want to fill the entire space of each tabPage with this dataGrid. Here is code, where i do this:

    private void tabControlMutants_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataGridView dgw = new DataGridView(); 

        DataGridViewTextBoxColumn testCaseCol = new System.Windows.Forms.DataGridViewTextBoxColumn();
        DataGridViewTextBoxColumn resultCol = new System.Windoows.Forms.DataGridViewTextBoxColumn();
        // 
        // dataGridView1
        // 
        dgw.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
        dgw.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
        testCaseCol,
        resultCol});
        dgw.Location = new System.Drawing.Point(3, 3);
        dgw.Name = "dataGridView1";
        dgw.AutoSize = true;
        dgw.Dock = System.Windows.Forms.DockStyle.Fill;
        dgw.TabIndex = 0;
        // 
        // TestCaseColumn
        // 
        testCaseCol.AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.Fill;
        testCaseCol.HeaderText = "Test Case";
        testCaseCol.Name = "TestCaseColumn";
        // 
        // ResultColumn
        // 
        resultCol.HeaderText = "Result";
        resultCol.Name = "ResultColumn";

        tabControlMutants.TabPages[(sender as TabControl).SelectedIndex].Controls.Add(dgw);
        ((System.ComponentModel.ISupportInitialize)(dgw)).EndInit();

        //fill dataGridView

    }

But it doesn't work, becouse when i resize the main window, data gridView doesn.t change its size (although the dock property is set to fill). Any ideas?