diff --git a/windows/syscall_windows.go b/windows/syscall_windows.go
index bba1e9e1..108760e4 100644
--- a/windows/syscall_windows.go
+++ b/windows/syscall_windows.go
@@ -278,6 +278,7 @@ func NewCallbackCDecl(fn interface{}) uintptr {
 //sys	QueryDosDevice(deviceName *uint16, targetPath *uint16, max uint32) (n uint32, err error) [failretval==0] = QueryDosDeviceW
 //sys	SetVolumeLabel(rootPathName *uint16, volumeName *uint16) (err error) = SetVolumeLabelW
 //sys	SetVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16) (err error) = SetVolumeMountPointW
+//sys	MessageBox(hwnd Handle, text *uint16, caption *uint16, boxtype uint32) (ret int32, err error) [failretval==0] = user32.MessageBoxW
 
 // syscall interface implementation for other packages
 
diff --git a/windows/types_windows.go b/windows/types_windows.go
index ca799d5e..0661a493 100644
--- a/windows/types_windows.go
+++ b/windows/types_windows.go
@@ -1298,6 +1298,41 @@ const (
 	ComputerNameMax                       = 8
 )
 
+// For MessageBox()
+const (
+	MB_OK                   = 0x00000000
+	MB_OKCANCEL             = 0x00000001
+	MB_ABORTRETRYIGNORE     = 0x00000002
+	MB_YESNOCANCEL          = 0x00000003
+	MB_YESNO                = 0x00000004
+	MB_RETRYCANCEL          = 0x00000005
+	MB_CANCELTRYCONTINUE    = 0x00000006
+	MB_ICONHAND             = 0x00000010
+	MB_ICONQUESTION         = 0x00000020
+	MB_ICONEXCLAMATION      = 0x00000030
+	MB_ICONASTERISK         = 0x00000040
+	MB_USERICON             = 0x00000080
+	MB_ICONWARNING          = MB_ICONEXCLAMATION
+	MB_ICONERROR            = MB_ICONHAND
+	MB_ICONINFORMATION      = MB_ICONASTERISK
+	MB_ICONSTOP             = MB_ICONHAND
+	MB_DEFBUTTON1           = 0x00000000
+	MB_DEFBUTTON2           = 0x00000100
+	MB_DEFBUTTON3           = 0x00000200
+	MB_DEFBUTTON4           = 0x00000300
+	MB_APPLMODAL            = 0x00000000
+	MB_SYSTEMMODAL          = 0x00001000
+	MB_TASKMODAL            = 0x00002000
+	MB_HELP                 = 0x00004000
+	MB_NOFOCUS              = 0x00008000
+	MB_SETFOREGROUND        = 0x00010000
+	MB_DEFAULT_DESKTOP_ONLY = 0x00020000
+	MB_TOPMOST              = 0x00040000
+	MB_RIGHT                = 0x00080000
+	MB_RTLREADING           = 0x00100000
+	MB_SERVICE_NOTIFICATION = 0x00200000
+)
+
 const (
 	MOVEFILE_REPLACE_EXISTING      = 0x1
 	MOVEFILE_COPY_ALLOWED          = 0x2
diff --git a/windows/zsyscall_windows.go b/windows/zsyscall_windows.go
index 4f35a028..0de0de93 100644
--- a/windows/zsyscall_windows.go
+++ b/windows/zsyscall_windows.go
@@ -41,6 +41,7 @@ var (
 	moduserenv  = NewLazySystemDLL("userenv.dll")
 	modmswsock  = NewLazySystemDLL("mswsock.dll")
 	modcrypt32  = NewLazySystemDLL("crypt32.dll")
+	moduser32   = NewLazySystemDLL("user32.dll")
 	modws2_32   = NewLazySystemDLL("ws2_32.dll")
 	moddnsapi   = NewLazySystemDLL("dnsapi.dll")
 	modiphlpapi = NewLazySystemDLL("iphlpapi.dll")
@@ -213,6 +214,7 @@ var (
 	procQueryDosDeviceW                    = modkernel32.NewProc("QueryDosDeviceW")
 	procSetVolumeLabelW                    = modkernel32.NewProc("SetVolumeLabelW")
 	procSetVolumeMountPointW               = modkernel32.NewProc("SetVolumeMountPointW")
+	procMessageBoxW                        = moduser32.NewProc("MessageBoxW")
 	procWSAStartup                         = modws2_32.NewProc("WSAStartup")
 	procWSACleanup                         = modws2_32.NewProc("WSACleanup")
 	procWSAIoctl                           = modws2_32.NewProc("WSAIoctl")
@@ -2316,6 +2318,19 @@ func SetVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16) (err erro
 	return
 }
 
+func MessageBox(hwnd Handle, text *uint16, caption *uint16, boxtype uint32) (ret int32, err error) {
+	r0, _, e1 := syscall.Syscall6(procMessageBoxW.Addr(), 4, uintptr(hwnd), uintptr(unsafe.Pointer(text)), uintptr(unsafe.Pointer(caption)), uintptr(boxtype), 0, 0)
+	ret = int32(r0)
+	if ret == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
 func WSAStartup(verreq uint32, data *WSAData) (sockerr error) {
 	r0, _, _ := syscall.Syscall(procWSAStartup.Addr(), 2, uintptr(verreq), uintptr(unsafe.Pointer(data)), 0)
 	if r0 != 0 {