Private Declare Function FindWindow Lib "USER32.DLL" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function DefWindowProcW Lib "USER32.DLL" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Const WM_SETTEXT As Long = &HC

Private Sub UserForm_Initialize()
   Dim UFHWnd As Long
   UFHWnd = FindWindow("ThunderDFrame", UserForm1.Caption) ' find the HWnd of the UserForm
   TitleBarCaption(UFHWnd) = "KOR: " & ChrW$(&HC5EC) & ChrW$(&HBCF4) & ChrW$(&HC138) & ChrW$(&HC694)
End Sub

Public Property Let TitleBarCaption(ByVal hWnd As Long, ByVal NewValue As String)
   DefWindowProcW hWnd, WM_SETTEXT, 0, ByVal StrPtr(NewValue)
End Property