Hello,

if a mousemove removes the invalid icons you may try to send a WM_MOUSEMOVE message to the systray

#DEFINE WM_MOUSEMOVE 0x0200

SendMessage(theHwnd,WM_MOUSEMOVE,0,0)

or with mouse cursor coordinates :
x = 1
y = 1
nCoord = BITOR(x,BITLSHIFT(y,16))
SendMessage(theHwnd,WM_MOUSEMOVE,0,nCoord)

Regards
Christian