How to know a specific checkbox inside datagridview is checked or not?

Question

i had a gridview which has 2 columns , one is textbox column and other is checkbox column, how to know which checkbox is checked .

Answer 1

 private void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
    {
        if (dataGridView1.IsCurrentCellDirty)
        {
            dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
        }
    }

    private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
    {
        if (((e.ColumnIndex) == 1) && ((bool)dataGridView1.Rows[e.RowIndex].Cells[1].Value))
        {
            MessageBox.Show(dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString());

        }
    }

these below links helped me to understand the concept of cellvalue_changed and cell_content_click.. http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellvaluechanged.aspx

and by the help of these links i finally got the solution to my problem