Vertical splitter in forms (Dynamic AX 2012)

1. Create a group inside the main group
note: between the two groups

2. In property window of that group
Autodeclaration  :Yes
Style  : SplitterVerticalContainer

3.In the class declaration of that form use below code
public class FormRun extends ObjectRun
{
    SysFormSplitter_X    m_vSplitter;
}

4. In the init method of the form use below code pattern

public void init()
{
    ;
    super();
    m_vSplitter = new SysFormSplitter_X(vSplitter, gridContainer, element);
}