Short answer "no". DesktopX doesn't expose the full Win Api and for some obvious reasons.
Here's what I can tell you.
Rainlendar 2 is suppose to be or is scripting is being developed so, this may be within reach. Haven't been back to the forums over there in quite some time.
There are two ways to access or more accurately control an external window.
1. The easiest being the AutoIt3 com object which can be directly called from within desktopX. As I write this I just moved a Windows Explorer window off screen & back on. Animation isn't possible.
2. The second is via DynaCall or DynaWrap. This requires an intermediate or highter scripting ability or the patience of a monk? Someone was nice enough to code this little treasure that gives you the ability to call Win32 api. To quote WSH Bazaar
Basically it will allow you to call functions in other dlls (like any of the win32 API function)
http://freenet-homepage.de/gborn/WSHBazaar/WSHDynaCall.htm