Try moving the code to the configureShell method of the ApplicationWindow. Here you will have the display / shell wired up correctly and it will be just before the shell is attached to the window which is where you want to be. I’ve tested on my end and it works for me if I put it into that function.

I used a datatable.select to populate a datarow array from datatable A then wanted to populate datatable B with the array.

I had to do :
dtA = dtB.Clone

before I could then do :
drArray = dtB.Select(blah)
For Each dr As DataRow In drArray
dtA.ImportRow(dr)
Next

Grab one of the five swt-win32-3128.dll in one of the subdiretories of …eclipse/configuration. Place a copy of this file in newly created directory …\eclipse\plugins\org.eclipse.swt.win32_3.1.0\os\win32\x86 (or in e.g. in …\eclipse\plugins\).

Add to a Java or SWT Run configuration on the arguments page in the VM arguments box the following line:
-Djava.library.path=${system:ECLIPSE_HOME}/plugins/org.eclipse.swt.${system:WS}_3.1.0/os/${system:OS}/${system:ARCH}
(or -Djava.library.path=${system:ECLIPSE_HOME}/plugins/ if you have chosen to place the file directly in the plugin directory).

Comments: Why do they have to distrubte five copies of the same file? The SWT Run configuration should provide the information I manually added! I created the deep directory structure because it made me feel so much in harmony with the naming conventions.