how to know DataGridViewCheckBoxColumn value has changed in the DataGridView?
I found the answer to the question
There is event CellContentClick.
private void dataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
//Column Index of column containing DataGridViewCheckBox
int columnIndex= searchIndex;
if (e.ColumnIndex == columnIndex)
MessageBox.Show("Check Box Status Changed");
}