Run an executable and wait

OleObject wsh
integer li_rc

CONSTANT integer MAXIMIZED = 3
CONSTANT integer MINIMIZED = 2
CONSTANT integer NORMAL = 1
CONSTANT boolean WAIT = TRUE
CONSTANT boolean NOWAIT = FALSE

wsh = CREATE OleObject
li_rc = wsh.ConnectToNewObject( "WScript.Shell" )

li_rc = wsh.Run("Notepad" , NORMAL, WAIT)
messagebox("hello", "world")

If WAITING, then Run returns any error code returned by the application.
In the example only three CONSTANTs are defined. But more options are available :

0 Hides the window and activates another window.
1 Activates and displays a window. If the window is minimized or
maximized, the system restores it to its original size and position. An
application should specify this flag when displaying the window for the
first time.
2 Activates the window and displays it as a minimized window.
3 Activates the window and displays it as a maximized window.
4 Displays a window in its most recent size and position. The
active window remains active.
5 Activates the window and displays it in its current size and
position.
6 Minimizes the specified window and activates the next top-level
window in the Z order.
7 Displays the window as a minimized window. The active window
remains active.
8 Displays the window in its current state. The active window
remains active.
9 Activates and displays the window. If the window is minimized or
maximized, the system restores it to its original size and position. An
application should specify this flag when restoring a minimized window.
10 Sets the show state based on the state of the program that
started the application.