transparent dialog

[stupomer]

Happy New Year to Gintaras and whole forum!
I wonder if it is possible to have a control (pushbutton autocheckbox) that toggles the transparency of the dlg without becoming transparent itself - so visible enough to turn transparency off.
I could I geuss do this with a separate child dialog but then would have to reposition it if the dialog moves so better if more integrated.
Maybe there is a simpler way with applying brush to one control or something.
Hoping there is something simple/elegant to accomplish this that I can't think of.
Thanks so much,
S

Function dlg_transparent_with_control

Code:

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

str controls = "4 5 6"
str e4 lb5 c6Tra
if(!ShowDialog("dlg_transparent_with_control" &dlg_transparent_with_control &controls)) ret

;BEGIN DIALOG
;0 "" 0x90C80A48 0x100 0 0 223 135 "Dialog"
;3 Button 0x54032000 0x0 2 28 48 14 "Button"
;4 Edit 0x54030080 0x200 4 48 96 14 ""
;5 ListBox 0x54230101 0x200 108 34 96 48 ""
;6 Button 0x54031003 0x0 0 0 90 16 "Transparent"
;1 Button 0x54030001 0x4 120 116 48 14 "OK"
;2 Button 0x54030000 0x4 170 116 48 14 "Cancel"
;END DIALOG
;DIALOG EDITOR: "" 0x2030605 "*" "" "" ""

ret
;messages
sel message
,case WM_INITDIALOG
,;__GdiHandle-- hb=CreateSolidBrush(0xff00)
,;Transparent hDlg 255 0xff00
,case WM_DESTROY
,case WM_COMMAND goto messages2
,;case WM_CTLCOLORDLG
,;ret hb
ret
;messages2
sel wParam
,case IDOK
,case IDCANCEL
,case 6
,,if(but(lParam))
,,,Transparent hDlg 50 0xff00
,,else
,,,Transparent hDlg 255 0xff00
ret 1