SSIS: how to read the result of a stored procedure into a global variable or something useful

I have a stored procedure i want to ru开发者_如何转开发n which will return a 0 or a 1. I would like to store that value in a ssis variable

1. use a dataflow task
2. define the variable using the "variable" tab on the left hand side (next to the toolbox tab)
3. use the "exectute sql task"
4. in the properties of the sql task setup a result set