func (tt *ToolTip) toolInfo(tool Widget) *win.TOOLINFO {
var ti win.TOOLINFO
var buf [80]uint16
hwnd := tool.Handle()
ti.CbSize = uint32(unsafe.Sizeof(ti))
ti.Hwnd = hwnd
ti.UId = uintptr(hwnd)
ti.LpszText = &buf[0]
if win.FALSE == tt.SendMessage(win.TTM_GETTOOLINFO, 0, uintptr(unsafe.Pointer(&ti))) {
return nil
}
return &ti
}
