GridData gridData;
GridLayout layout;
// main tab set up
Composite gMainTab = new Composite(parent, SWT.NULL);
gridData = new GridData(GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL);
gMainTab.setLayoutData(gridData);
layout = new GridLayout();
layout.numColumns = 3;
gMainTab.setLayout(layout);
// MAIN TAB DATA
return gMainTab;