'updown range
' 检索的 32 位范围的上下控制。
'  hUDM      : Handle to the UpDown control. (e.g. HWND_FORM1_UPDOWN1)
'  pLow      : Pointer to a signed integer that receives the lower limit of 
'              the up-down control range. This parameter may be NULL.
'  pHigh     : Pointer to a signed integer that receives the upper limit of 
'              the up-down control range. This parameter may be NULL.
Sub FF_UpDown_GetRange32 (ByVal hUDM As HWND, ByRef pLow As WORD, ByRef pHigh As WORD)
   
    SendMessage hUDM, UDM_GETRANGE32, pLow, pHigh

End Sub
