Mach es so, wie in der SciTE-Hilfe gezeigt:
[autoit]; Example 1
#AutoIt3Wrapper_Res_Icon_Add=C:\Program Files\AutoIt3\Icons\au3.ico
#AutoIt3Wrapper_Res_Icon_Add=C:\Program Files\AutoIt3\Icons\filetype1.ico
#AutoIt3Wrapper_Res_Icon_Add=C:\Program Files\AutoIt3\Icons\filetype2.ico
#AutoIt3Wrapper_Res_Icon_Add=C:\Program Files\AutoIt3\Icons\filetype3.ico
#AutoIt3Wrapper_Res_Icon_Add=C:\Program Files\AutoIt3\Icons\filetype-blank.ico
#include <ButtonConstants.au3>
GUICreate("Demo resource ICO's")
$h_Button1 = GUICtrlCreateButton("my picture button", 10, 20, 40, 40, $BS_ICON)
GUISetState()
For $x = 0 To 9
$rc = TraySetIcon(@ScriptFullPath, -$x)
$rc2 = GUICtrlSetImage($h_Button1, @ScriptFullPath, -$x)
If $x < 5 Then
TrayTip("Default ico:" & $x, "TraySetIcon rc:" & $rc & @LF & "GUICtrlSetImage rc:" & $rc2, 3)
Else
TrayTip("New ico:" & $x, "TraySetIcon rc:" & $rc & @LF & "GUICtrlSetImage rc:" & $rc2, 3)
EndIf
Sleep(2000)
Next
GUIDelete()