http://ahkscript.org/boards/viewtopic.php?f=5&t=315&p=2748#p2748

hCursorDemo.ahk

Gui, Add, Edit, w300 h100 hwndhEdit, try to navigate with caret and cursor`n this is a test
Gui, Show

;some part of an old code
IconDataHex =
( Join
0000020001002020000000000000a8100000160000002800000020000000
400000000100200000000000801000000000000000000000000000000000
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000000000000000000000000000000000000000000000000000000000000
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00000000000000000000002000000060171717ff1f1f1fff1c1c1cff4040
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00000000000000000000000000000000000000400b0b0b9e232323ff1717
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000000000000000000000000000000000000000000000000002000000060
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33ff00000040000000000000000000000000000000000000000000000000
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00000000000000000000002000000060181818ff171717ff2f2f2fffa2a2
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f0ff4f4f4fff1d1d1dff1d1d1dff1f1f1fff000000a00000006000000000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2d2d2dff333333ff131313ff151515ff161616ff00000000000000000000
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27ff010303ff242c2fff7f837fff586659ff254628ff254628ff00ff02ff
00ff02ff179719ff0c7c0cff1b1b1bff262626ff656565ff505050ff0000
00000000000000000020000000801f1f1fff1d1d1dff5e5e5effbebfbeff
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00000000000000000000000000000000282828ff383838ff848484ffbebf
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000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000383838ff5050
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000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000
000000000000000000009a9b9aff676867ff282828ff0b0b0bcf020202a1
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000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000ffff03fffffe03fffffe03ff
fffc03fffffc03fffff803fffff003fffff001ffffe0003fffc0000fffc0
0007ff800007ff800003ff000003fe000001fe000001fc000001f8000000
f8000000f0000000e0000000e0000000c0000000c0000000800000000000
000f0000007f000003ff00003fff0001ffff000fffff007fffff
)

VarSetCapacity( IconData,( nSize:=StrLen(IconDataHex)//2) )
Loop %nSize%
  NumPut( "0x" . SubStr(IconDataHex,2*A_Index-1,2), IconData, A_Index-1, "Char" )

IconDataHex := ""

hICon := DllCall( "CreateIconFromResourceEx", UInt,&IconData+22, UInt,NumGet(IconData,14), Int,1, UInt,0x30000, Int,0, Int,0, UInt,0 )

VarSetCapacity(icon_info, 20, 0)
DllCall("GetIconInfo", ptr, hIcon, ptr, &icon_info)
NumPut(0, icon_info, 0) ; not_Icon
NumPut(0, icon_info, 4) ; xHotspot
NumPut(0, icon_info, 8) ; yHotspot

hCursor := DllCall("CreateIconIndirect", ptr, &icon_info)

ReplaceCursor(hEdit, hCursor)
Return

ReplaceCursor(hControl, hCursor) {
    DllCall("SetClassLong" (A_PtrSize=8 ? "Ptr":""), "Ptr", hControl, "int", -12, "Ptr", hCursor)
}