Strange behaving inputbox

[freggel99]

\Dialog_Editor
function# hDlg message wParam lParam
if(hDlg) goto messages

str controls = "3 4"
str lb3 e4Inp

BEGIN DIALOG
0 "" 0x90C80A44 0x100 0 0 221 133 "Form"
3 ListBox 0x54230101 0x200 110 8 96 34 ""
4 Edit 0x54031000 0x200 6 8 96 14 "Input"
5 Button 0x54032000 0x0 6 62 48 14 "Copy"
6 Static 0x54000000 0x0 4 82 198 30 ""
1 Button 0x54030001 0x4 120 116 48 14 "OK"
2 Button 0x54030000 0x4 170 116 48 14 "Cancel"
END DIALOG
DIALOG EDITOR: "" 0x2020001 "" ""

if(!ShowDialog("Name" 0 &controls 0 0 0 0 0 100 600)) ret

ret
messages
sel message
case WM_INITDIALOG
DT_Init(hDlg lParam) ;;*
PostMessage hDlg WM_COMMAND LBN_SELCHANGE<<16|3 id(3 hDlg)
ret 1
case WM_DESTROY DT_DeleteData(hDlg) ;;*
case WM_COMMAND goto messages2
ret
messages2
sel wParam
case LBN_SELCHANGE<<16|3
_i=LB_SelectedItem(lParam)
str sh
sel _i
case 0 sh="help text 0"
case 1 sh="help text 1"
case 2 sh="help text 2"
sh.setwintext(id(6 hDlg))

case 5 ;;Copy button clicked
int i=LB_SelectedItem(id(3 hDlg))
str s.getwintext(id(4 hDlg))
s.setclip

case IDOK
DT_Ok hDlg ;;*
case IDCANCEL DT_Cancel hDlg ;;*
ret 1

I use something like this... I modified it