A Value Input block is used to provide input value into a Custom Building block from outside of the block. The Value Input block shows the following properties:
The Block Header (Value Input)
The title of the block “Value Input” can be changed by double-clicking on it and typing in a new title.
Input defines the value that can be input into the custom building block. So to make it available from outside into the custom building block, the ‘input’ should be connected to desired property of required block.Updated January 12th 2018.