How to move a grid spliter from code

Dear all,

I have a grid of 2 rows which are separated by a grid spliter.
The Height of row 1 container is fully control by the Height of row 0  , so based on that contro, inside row0 and 1 does not have Height property set.

What I need to do is to chnage by code the Height of the row0 control by moving the gridspliter, until the inside control gets a predefined ActualHeight value.

For instance initially my row0 control have an Actual heigt of 200px, I then need to move grid splitter to get control ActualHeight to 250. Then when I complete relquires business rule at this size I need to set back initial position of GridSpliter to get control actual height back to 200px

How to change the position of gridspliter from code?

regards