Hex in String zu Hex, oder anderes Problem?

#include <GUIConstantsEx.au3>
$handle=FileOpen("C:\colors.jpf",1)
$color=""
for $y=1 to 76 ;testweise nicht 768
for $x=1 to 102 ;dito
ToolTip($x & "," & $y,0,0)
$color=$color & String(hex(PixelGetColor($x,$y),6))
Next
FileWriteLine($handle,$color)
$color=""
Next
FileClose($handle)
$handle=FileOpen("C:\colors.jpf",0)
GUICreate("Draw")
$field=GUICtrlCreateGraphic(0,0)
GUICtrlSetBkColor(-1, 0xffffff)
for $y=1 to 76
$color=FileReadLine($handle,$y)
for $x=1 to 102
$work=StringLeft($color,6)
StringTrimLeft($color,6)
GUICtrlSetColor($field, Hex(Int('0x' & $work),6))
;~ Msgbox(0,"","0x" & $work)
GUICtrlSetGraphic($field,$GUI_GR_PIXEL,$x,$y)
Next
Next
GUISetState()
Sleep(3000)