hi Andreas,

 AJ> With DosQProcStatus I get the Session ID, but not the window
 AJ> handle, and it seems there are no Toolkit (better IOCL) functions
 AJ> to reach the HWND ?

Have a look at WinQuerySwitchList: somewhere deep down there is a
 
 Switch-list control block structure. 

 typedef struct _SWCNTRL {
   HWND         hwnd;                   /*  Window handle. */
   HWND         hwndIcon;               /*  Window-handle icon. */
   HPROGRAM     hprog;                  /*  Program handle. */
   PID          idProcess;              /*  Process identity. */
   ULONG        idSession;              /*  Session identity. */
   ULONG        uchVisibility;          /*  Visibility: */
   ULONG        fbJump;                 /*  Jump indicator: */
   CHAR         szSwtitle[MAXNAMEL+4];  /*  Switch-list control block title
(null-terminated). */
   ULONG        bProgType;              /*  Program type. */
 } SWCNTRL;
 
 typedef SWCNTRL *PSWCNTRL;
 

for all.

groetjes,
	  hugo
--
E-mail: huug{at}telebyte.nl