stop crashing for nothing, fix reboot to firmware

pkg/windows/windows.go

@@ -0,0 +1,30 @@
+package windows
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+const (
+	NULL  = 0
+	MB_OK = 0
+)
+
+// MessageBox of Win32 API.
+func MessageBox(hwnd uintptr, caption, title string, flags uint) int {
+	_caption, err := syscall.UTF16PtrFromString(caption)
+	if err != nil {
+		panic(err)
+	}
+	_title, err := syscall.UTF16PtrFromString(title)
+	if err != nil {
+		panic(err)
+	}
+	ret, _, _ := syscall.NewLazyDLL("user32.dll").NewProc("MessageBoxW").Call(
+		uintptr(hwnd),
+		uintptr(unsafe.Pointer(_caption)),
+		uintptr(unsafe.Pointer(_title)),
+		uintptr(flags))
+
+	return int(ret)
+}