Maurilio,
That was fixed recently. This change is required in source\classes\group.prg
#define WM_UPDATEUISTATE 296 // 0x0128
METHOD HandleEvent( nMsg, nWParam, nLParam ) CLASS TGroup
local nResult
if ::lDrag .and. nMsg == WM_NCHITTEST // To have a standard behavior on Clicks
return DefWindowProc( ::hWnd, nMsg, nWParam, nLParam )
endif
if nMsg == WM_UPDATEUISTATE // Groups and contained controls were erased when pressing ALT
nResult = Super:HandleEvent( nMsg, nWParam, nLParam )
::oWnd:Refresh()
return nResult
endif
return Super:HandleEvent( nMsg, nWParam, nLParam )