Creating Blocks using Dynamic (Coding) way

 Creating Blocks using Dynamic (Coding) way:

function modulename_block($op='list',$delta=array(),$edit=array()) {
    global $base_path;
    switch ($op) {

        case 'list':
            $blocks[0]['info'] = t('Block name 1');
            $blocks[1]['info'] = t('Block name 2');
            return $blocks;
            break;
        case 'view':
            switch ($delta) {
                case 0:
                    $blocks['subject'] = t('');
                    $blocks['content'] = drupal_get_form('reset_form');
                  break;
                case 1:
                    $blocks['subject'] = t('');
                    $blocks['content'] = drupal_get_form('login_form'); 
                  break;
                }
      return $blocks;
    break;
    }   
}

function reset_form(){
     $form['pass'] = array(
    '#type' => 'textfield',
    '#title' => t('Password'),
    '#maxlength' => 15,
  );
  $form['conform_pass'] = array(
    '#type' => 'password',
    '#title' => t('ConformPassword'),
    '#maxlength' => 15,
  );
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit'),
  ); 
  return $form;
}

function login_form(){
  $form['mailid'] = array(
    '#type' => 'textfield',
    '#title' => t('Mail Id'),
    '#maxlength' => 15,
  );
  $form['password'] = array(
    '#type' => 'password',
    '#title' => t('Password'),
    '#maxlength' => 15,
  );
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit'),
  ); 
  return $form;
}

After creating the block,assign it to the proper region.