DBrowse:New(): public: return self
  The object is filled with default values, the following predcessor
  variables are changed:

  DBrowse:InsBlock: public: code_block
    Code block for one row appending to edited table.

  DBrowse:DelBlock: public: code_block
    Code block for deleting of current row of edited table.

  DBrowse:InfoBlock: public: code_block
    Code block for actual record number, filter and index displaying at the
    bottom window border of current task.