Open new workspace window.

Does aynone know how i can access a workplaceWindow? 

I would like to open a new workplaceWindow and then to be able to set the activeWindow (a listPage in this case). 

I use this function to open the new workplaceWindow

hWorkspace =  infolog.createWorkspaceWindow();

Since it retuns a values for the newly created workspace ... there should be a way to acces it and set the "default form" opened.

Thank You!