Firefox - acc combo

[_pi]

is there any trick to use SetValue for text fields in FF ?

i get
Error (RT) in Macro21: 0x80004001, Not implemented

Code:

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int hwnd=win("Quick Macros :: Post a reply - Mozilla Firefox" "MozillaUIWindowClass")
Acc a=acc("subject" "TEXT" hwnd "MozillaContentWindowClass" "" 0x1801 0x0 0x20000040)
a.SetValue("test")

i could use a.Mouse(1) as workaround and then use outp.