form1.frm

用户MODBUS规约通信编程,起参考作用.

VERSION 5.00
Object = "{86CF1D34-0C5F-11D2-A9FC-0000F8754DA1}#2.0#0"; "MSCOMCT2.OCX"
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   4800
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   6405
   LinkTopic       =   "Form1"
   ScaleHeight     =   4800
   ScaleWidth      =   6405
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text1 
      Height          =   375
      Left            =   3360
      TabIndex        =   3
      Top             =   2880
      Width           =   1575
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   375
      Left            =   1800
      TabIndex        =   2
      Top             =   2880
      Width           =   975
   End
   Begin MSComCtl2.DTPicker DTPicker2 
      Height          =   375
      Left            =   3120
      TabIndex        =   1
      Top             =   1560
      Width           =   1815
      _ExtentX        =   3201
      _ExtentY        =   661
      _Version        =   393216
      Format          =   66191361
      CurrentDate     =   37886
   End
   Begin MSComCtl2.DTPicker DTPicker1 
      Height          =   375
      Left            =   3120
      TabIndex        =   0
      Top             =   720
      Width           =   2055
      _ExtentX        =   3625
      _ExtentY        =   661
      _Version        =   393216
      Format          =   66191361
      CurrentDate     =   37886
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
Dim begin_time, end_time As Date
Dim totaltime As Long
begin_time = DTPicker1.Value
end_time = DTPicker2.Value
 totaltime = DateDiff("d", CDate(begin_time), CDate(end_time))
 Text1.Text = totaltime
 
End Sub