To do what you want, put TLayout in your form and set its alignment to βbottomβ. Inside you can place two buttons that you want to have.
, , . , 10 , 25 , - 35.
10, . , , 15, "". , . , .
-------+--------+------------------+----
| |H=25 (Button) |
| 15 | | 10
-------+ padd. +------------------+
10 bot layout mrgn