vb程序编写代码大全,常用vb的编程代码
vb程序编写代码大全,常用vb的编程代码详细介绍
本文目录一览： vb编写hello world 程序
vb编写hello world 程序可以参考下面的代码：
Private Sub Form_Load()
MsgBox ("Hello World")
End Sub
在窗体上单击即可运行程序。
扩展资料：
相关参考函数：
MsgBox 常数 与MsgBox 函数一起使用的常数列表。
MsgBox 函数： 在对话框中显示消息，等待用户单击按钮，并返回表示用户所击按钮的数值。
乘法运算符 (*) ：两数相乘。
取反运算符 (-)： 表示数值表达式的相反数。
Not 运算符： 执行表达式的逻辑“非”运算。
Month 函数： 返回月份，取值范围为 1 至 12。
参考资料来源：百度百科-Visual Basic
VB计算机程序代码急需!!!!!!!
分类: 电脑/网络 >> 程序设计 >> 其他编程语言
问题描述:
我能VB编写一个简易的计算机,但不知道从何入手,请各位指点一二!!!!!!
解析:
Option Explicit
Dim sz As Integer ＆#39;用来记录进行何种运算
Dim x As Single, y As Single ＆#39;用来记录进行运算的两个数
＆#39;从第一个命令按钮到第十个是用来输入0至9十个数字的
Private Sub Command1_Click()
Text1.Text = Text1.Text & "1"
End Sub
Private Sub Command2_Click()
Text1.Text = Text1.Text & "2"
End Sub
Private Sub Command3_Click()
Text1.Text = Text1.Text & "3"
End Sub
Private Sub Command4_Click()
Text1.Text = Text1.Text & "4"
End Sub
Private Sub Command5_Click()
Text1.Text = Text1.Text & "5"
End Sub
Private Sub Command6_Click()
Text1.Text = Text1.Text & "6"
End Sub
Private Sub Command7_Click()
Text1.Text = Text1.Text & "7"
End Sub
Private Sub Command8_Click()
Text1.Text = Text1.Text & "8"
End Sub
Private Sub Command9_Click()
Text1.Text = Text1.Text & "9"
End Sub
Private Sub Command10_Click()
Text1.Text = Text1.Text & "0"
End Sub
Private Sub Command11_Click()
Text1.Text = Text1.Text & "." ＆#39;输入小数点
End Sub
Private Sub Command12_Click()
x = CSng(Text1.Text) ＆#39;将输入的数转换成单精度型的
sz = 1 ＆#39;设置即将进行的是加法运算
Text1.Text = "" ＆#39;将文本框清空，以便输入第二个数
End Sub
Private Sub Command13_Click()
x = CSng(Text1.Text)
sz = 2
Text1.Text = ""
End Sub
Private Sub Command14_Click()
x = CSng(Text1.Text)
sz = 3
Text1.Text = ""
End Sub
Private Sub Command15_Click()
x = CSng(Text1.Text)
sz = 4
Text1.Text = ""
End Sub
Private Sub Command16_Click()
x = CSng(Text1.Text)
sz = 5
Text1.Text = ""
End Sub
Private Sub Command17_Click()
x = CSng(Text1.Text)
Text1.Text = Sqr(x) ＆#39;因为求平方根只需一个运算对象，因此在此就给出结果
End Sub
Private Sub Command18_Click()
On Error GoTo ex ＆#39;设置如果遇到错误就退出此过程
y = CSng(Text1.Text)
Select Case sz ＆#39;根据sz的值来决定进行何种运算
Case 1
Text1.Text = x + y ＆#39;进行加法运算并将结果显示在文本框中
Case 2
Text1.Text = x - y
Case 3
Text1.Text = x * y
Case 4
Text1.Text = x / y
Case 5
Text1.Text = x Mod y
End Select
ex:
End Sub
Private Sub Command19_Click()
Text1.Text = "" ＆#39;将文本框清空，以便输入新的数字
End Sub
vb代码大全
Option Explicit
Function fc(a) As Boolean
Dim i As Long
For i = 2 To Int(a / 2)
If a Mod i = 0 Then
fc = False
Exit For
Else
fc = True
End If
Next i
End Function
Private Sub Form_Click()
Dim i, j, k, m, s, g, f As Integer
j = 0
k = 0
f = 0
Dim a(1 To 80) As Integer
Dim b(1 To 80) As Integer
Dim c(1 To 80) As Integer
Dim d(1 To 80) As Integer
For i = 1 To 80
a(i) = Int(Rnd() * 100)
if a(i)<10 then a(i)=a(i)+10
If a(i) Mod 2 = 0 Then
j = j + 1
b(j) = a(i)
Else
k = k + 1
c(k) = a(i)
End If
Next i
For i = 1 To j
For m = i + 1 To j
If b(i) < b(m) Then
s = b(m)
b(m) = b(i)
b(i) = s
End If
Next m
Next i
For i = 1 To k
For m = i + 1 To k
If b(i) < b(m) Then
s = c(m)
c(m) = c(i)
c(i) = s
End If
Next m
Next i
For i = 1 To 80
If fc(a(i)) = True Then
g = g + 1
d(g) = a(i)
End If
Next i
Print "随机数："
For i = 1 To 80
f = f + 1
If f < 11 Then
Print " " & a(i);
Else
f = 1
Print
Print " " & a(i);
End If
Next i
Print
Print "偶数："
f = 0
For i = 1 To j
f = f + 1
If f < 11 Then
Print " " & b(i);
Else
f = 1
Print
Print " " & b(i);
End If
Next i
Print
Print "奇数:"
f = 0
For i = 1 To k
f = f + 1
If f < 11 Then
Print " " & c(i);
Else
f = 1
Print
Print " " & c(i);
End If
Next i
Print
Print "素数："
f = 0
For i = 1 To g
f = f + 1
If f < 11 Then
Print " " & d(i);
Else
f = 1
Print
Print " " & d(i);
End If
Next i
s = 0
Print
Print "素数个数：" & g
For i = 1 To g
s = s + d(i)
Next i
Print "素数总和：" & s
End Sub
VB程序设计代码
将你的textbox控件定义成数组控
件，然后运行以下代码：
Private
Sub
command1_click()这
个是保存Text1的内容到本身目录
下.
Open
App.Path
\123.txt
For
Append
As
#1
Print
#1,
Text1(0).Text
Print
#1,
Text1(1).Text
Print
#1,
Text1(2).Text
Close
#1
End
Sub
Private
Sub
Form_Load()
Dim
i
As
Integer
Open
App.Path
\123.txt
For
Input
As
#1
Do
While
Not
EOF(1)
Line
Input
#1,
ss
Text1(i).Text
=
ss
i
=
i
+
1
Loop
Close
#1
End
Sub
将你的textbox控件定义成数组控
件，然后运行以下代码：
Private
Sub
command1_click()这
个是保存Text1的内容到本身目录
下.
Open
App.Path
\123.txt
For
Append
As
#1
Print
#1,
Text1(0).Text
Print
#1,
Text1(1).Text
Print
#1,
Text1(2).Text
Close
#1
End
Sub
Private
Sub
Form_Load()
Dim
i
As
Integer
Open
App.Path
\123.txt
For
Input
As
#1
Do
While
Not
EOF(1)
Line
Input
#1,
ss
Text1(i).Text
=
ss
i
=
i
+
1
Loop
Close
#1
End
Sub
常用vb的编程代码
先在程序中加一个Label,名字应该符合VB程序控件命名规范:
lbl
再加一个Timer控件,名字也要符合命名规范
在窗体代码对话框中打入
Private Sub Form_Load()
On Error Resume Next
Me.Font = "Arial"
Me.FontSize = 24
Me.FontBold = True
.Enabled = True
.Interval = 1000
End Sub
'下列函数只能二选其一
'是时间显示
Private Sub
_Timer()
On Error Resume Next
_Timer()
On Error Resume Next
用VB编写一个计算器程序的代码
控件：text,com1,com2三种
属性设置：无
命令如下：
通用命令
Option Explicit
Dim v As Boolean
Dim s As Integer
Dim x As Double
Dim y As Double
按钮一的命令
Private Sub Command1_Click(Index As Integer)
If Form1.Tag = "s" Then
If Index = 10 Then
Text1.Text = "0"
Else
Text1.Text = Command1(Index).Caption
End If
Form1.Tag = ""
Else
Text1.Text = Text1.Text & Command1(Index).Caption
End If
End Sub
按钮二的命令
Private Sub Command2_Click(Index As Integer)
Form1.Tag = "s"
If v Then
x = Val(Text1.Text)
v = Not v
Else
y = Val(Text1.Text)
Select Case s
Case 0
Text1.Text = x + y
Case 1
Text1.Text = x - y
Case 2
Text1.Text = x * y
Case 3
If y <> 0 Then
Text1.Text = x / y
Else
MsgBox ("不能以0为除数")
Text1.Text = x
v = False
End If
Case 4
y = 0
v = False
End Select
x = Val(Text1.Text)
End If
s = Index
End Sub
编辑一个有0~9、小数点、加减乘除的计算器
用一个窗体就可以实现，你可以试试
Option Explicit
Dim strNumber As String
Dim strPoint As String
Dim dblNum1 As Double
Dim intOperator As Integer
'清除结果
Private Sub cmdGT_Click()
txtDisplay.Text = "0."
strNumber = ""
strPoint = "."
intOperator = 7
End Sub
'输入数字
Private Sub cmdNumber_Click(Index As Integer)
strNumber = strNumber & cmdNumber(Index).Caption
txtDisplay.Text = strNumber & strPoint
End Sub
Private Sub cmdOnOff_Click()
End
End Sub
'运算过程
Private Sub cmdOperator_Click(Index As Integer)
Dim dblnum2 As Double
'是第一次单击运算符时，将输入的值先赋给第一个数，否则赋值给第二个数进行运算
If intOperator = 7 Then
dblNum1 = CDbl(txtDisplay.Text)
Else
dblnum2 = CDbl(Val(txtDisplay.Text))
'根据输入的符号进行运算
'求普通运算
Select Case intOperator
Case 0
dblNum1 = dblNum1 + dblnum2
Case 1
dblNum1 = dblNum1 - dblnum2
Case 2
dblNum1 = dblNum1 * dblnum2
Case 3
If dblnum2 <> 0 Then
dblNum1 = dblNum1 / dblnum2
Else
MsgBox "除数不能为“0”！请重新输入除数。", vbOKOnly + vbInformation, "除零错误"
Index = intOperator
End If
Case 6
dblNum1 = dblNum1 * dblnum2 / 100
End Select
End If
'取得当前输入的运算符，以做下次运算
intOperator = Index
strNumber = ""
txtDisplay = CStr(dblNum1)
'判断是否为文本框中的数字加点
If Not txtDisplay Like "*.*" Then
txtDisplay.Text = txtDisplay.Text & "."
End If
End Sub
Private Sub cmdOtherOper_Click(Index As Integer)
Dim dblNum As Double
'求平方根，平方，
dblNum = CDbl(Val(txtDisplay.Text))
Select Case Index
Case 0
'验证数据是否有效
If dblNum >= 0 Then
txtDisplay.Text = CStr(Sqr(dblNum))
Else
MsgBox "负数不能开平方根！", _
vbOKOnly + vbCritical, "开平方根错误"
End If
Case 1
txtDisplay.Text = CStr(dblNum ^ 2)
End Select
'判断是否为文本框中的数字加点
If Not txtDisplay Like "*.*" Then
txtDisplay.Text = txtDisplay.Text & "."
End If
End Sub
Private Sub cmdPoint_Click()
strNumber = strNumber & strPoint
strPoint = ""
End Sub
Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
'使被按下的数字键的对应按钮取得焦点
Select Case KeyCode
Case 48 To 57
cmdNumber(KeyCode - 48).SetFocus
Case 96 To 105
cmdNumber(KeyCode - 96).SetFocus
Case Else
'使按下的符号键对应的按钮取得焦点
If KeyCode = 107 Or (Shift = vbShiftMask And KeyCode = 187) Then
cmdOperator(0).SetFocus
cmdOperator_Click (0)
ElseIf KeyCode = 109 Or KeyCode = 189 Then
cmdOperator(1).SetFocus
cmdOperator_Click (1)
ElseIf KeyCode = 106 Or (Shift = vbShiftMask And KeyCode = 56) Then
cmdOperator(2).SetFocus
cmdOperator_Click (2)
ElseIf KeyCode = 111 Or KeyCode = 191 Then
cmdOperator(3).SetFocus
cmdOperator_Click (3)
ElseIf KeyCode = 13 Then
cmdOperator(7).SetFocus
cmdOperator_Click (7)
ElseIf KeyCode = 8 Then
cmdGT.SetFocus
Call cmdGT_Click
End If
End Select
End Sub
Private Sub Form_KeyPress(KeyAscii As Integer)
'将合法的数据输入到文本框
Select Case KeyAscii
Case 48 To 58
'调用数字键点击处理程序
cmdNumber_Click KeyAscii - 48
KeyAscii = 0
Case 46
'调用小数点输入
cmdPoint_Click
KeyAscii = 0
Case 13
'当敲击回车时，不能触发Form的 KeyUp 事件，因此在这里设置文本框的焦点
txtDisplay.SetFocus
Case Else
KeyAscii = 0
End Select
End Sub
Private Sub Form_KeyUp(KeyCode As Integer, Shift As Integer)
txtDisplay.SetFocus
End Sub
Private Sub Form_Load()
strNumber = ""
strPoint = "."
intOperator = 7
End Sub
先放图
代码如下
Private Sub Command1_Click()
Text3.Text = Val(Text1.Text) + Val(Text2.Text)
End Sub
Private Sub Command2_Click()
Text3.Text = Val(Text1.Text) - Val(Text2.Text)
End Sub
Private Sub Command3_Click()
Text3.Text = Val(Text1.Text) * Val(Text2.Text)
End Sub
Private Sub Command4_Click()
Text3.Text = Val(Text1.Text) / Val(Text2.Text)
End Sub
Private Sub Command5_Click()
Text1 = ""
Text2 = ""
Text3 = ""
End Sub
Private Sub Command6_Click()
End
End Sub
完全版的前后台代码...
'请把下面的保存为 form1.frm
VERSION 5.00
Begin VB.Form Calculator
BorderStyle = 1 'Fixed Single
Caption = "计算器"
ClientHeight = 2970
ClientLeft = 2580
ClientTop = 1485
ClientWidth = 3270
ClipControls = 0 'False
BeginProperty Font
Name = "System"
Size = 9.75
Charset = 0
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Icon = "CALC.frx":0000
LinkMode = 1 'Source
LinkTopic = "Form1"
MaxButton = 0 'False
PaletteMode = 1 'UseZOrder
ScaleHeight = 2970
ScaleWidth = 3270
WhatsThisHelp = -1 'True
Begin VB.CommandButton Number
Caption = "7"
Height = 480
Index = 7
Left = 120
TabIndex = 7
Top = 600
Width = 480
End
Begin VB.CommandButton Number
Caption = "8"
Height = 480
Index = 8
Left = 720
TabIndex = 8
Top = 600
Width = 480
End
Begin VB.CommandButton Number
Caption = "9"
Height = 480
Index = 9
Left = 1320
TabIndex = 9
Top = 600
Width = 480
End
Begin VB.CommandButton Cancel
Caption = "C"
Height = 480
Left = 2040
TabIndex = 10
Top = 600
Width = 480
End
Begin VB.CommandButton CancelEntry
Caption = "CE"
Height = 480
Left = 2640
TabIndex = 11
Top = 600
Width = 480
End
Begin VB.CommandButton Number
Caption = "4"
Height = 480
Index = 4
Left = 120
TabIndex = 4
Top = 1200
Width = 480
End
Begin VB.CommandButton Number
Caption = "5"
Height = 480
Index = 5
Left = 720
TabIndex = 5
Top = 1200
Width = 480
End
Begin VB.CommandButton Number
Caption = "6"
Height = 480
Index = 6
Left = 1320
TabIndex = 6
Top = 1200
Width = 480
End
Begin VB.CommandButton Operator
Caption = "+"
Height = 480
Index = 1
Left = 2040
TabIndex = 12
Top = 1200
Width = 480
End
Begin VB.CommandButton Operator
Caption = "-"
Height = 480
Index = 3
Left = 2640
TabIndex = 13
Top = 1200
Width = 480
End
Begin VB.CommandButton Number
Caption = "1"
Height = 480
Index = 1
Left = 120
TabIndex = 1
Top = 1800
Width = 480
End
Begin VB.CommandButton Number
Caption = "2"
Height = 480
Index = 2
Left = 720
TabIndex = 2
Top = 1800
Width = 480
End
Begin VB.CommandButton Number
Caption = "3"
Height = 480
Index = 3
Left = 1320
TabIndex = 3
Top = 1800
Width = 480
End
Begin VB.CommandButton Operator
Caption = "X"
Height = 480
Index = 2
Left = 2040
TabIndex = 14
Top = 1800
Width = 480
End
Begin VB.CommandButton Operator
Caption = "/"
Height = 480
Index = 0
Left = 2640
TabIndex = 15
Top = 1800
Width = 480
End
Begin VB.CommandButton Number
Caption = "0"
Height = 480
Index = 0
Left = 120
TabIndex = 0
Top = 2400
Width = 1080
End
Begin VB.CommandButton Decimal
Caption = "."
Height = 480
Left = 1320
TabIndex = 18
Top = 2400
Width = 480
End
Begin VB.CommandButton Operator
Caption = "="
Height = 480
Index = 4
Left = 2040
TabIndex = 16
Top = 2400
Width = 480
End
Begin VB.CommandButton Percent
Caption = "%"
Height = 480
Left = 2640
TabIndex = 17
Top = 2400
Width = 480
End
Begin VB.Label Readout
Alignment = 1 'Right Justify
BackColor = &H0000FFFF&
BorderStyle = 1 'Fixed Single
Caption = "0."
BeginProperty Font
Name = "MS Sans Serif"
Size = 12
Charset = 0
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H00000000&
Height = 375
Left = 120
TabIndex = 19
Top = 105
Width = 3000
End
End
Attribute VB_Name = "Calculator"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' --------------------------------------------------------------------------
' 版权所有 (C) 1994 Microsoft Corporation
'
' 您可以免费以任何方式使用、修改、复制并分发您认为有用的
' 示例应用程序文件 (或任何修改过的版本)。Microsoft 对任何
' 示例应用程序文件不做任何保证，不负任何责任和义务。
' --------------------------------------------------------------------------
Option Explicit
Dim Op1, Op2 ' 前面输入的操作数
Dim DecimalFlag As Integer ' 小数点仍然存在吗？
Dim NumOps As Integer ' 操作数个数
Dim LastInput ' 指示上一次按键事件的类型
Dim OpFlag ' 指示未完成的操作
Dim TempReadout
' C (取消) 按钮的 Click 事件过程
' 重新设置显示并初始化变量
Private Sub Cancel_Click()
Readout = Format(0, "0.")
Op1 = 0
Op2 = 0
Form_Load
End Sub
' CE (取消输入) 按钮的 Click 事件过程
Private Sub CancelEntry_Click()
Readout = Format(0, "0.")
DecimalFlag = False
LastInput = "CE"
End Sub
' 小数点 (.) 按钮的 Click 事件过程
' 如果上一次按键为运算符，初始化 readout 为 "0."；
' 否则显示时追加一个小数点
Private Sub Decimal_Click()
If LastInput = "NEG" Then
Readout = Format(0, "-0.")
ElseIf LastInput > "NUMS" Then
Readout = Format(0, "0.")
End If
DecimalFlag = True
LastInput = "NUMS"
End Sub
' 窗体的初始化过程
' 设置所有变量为其初始值
Private Sub Form_Load()
DecimalFlag = False
NumOps = 0
LastInput = "NONE"
OpFlag = " "
Readout = Format(0, "0.")
'Decimal.Caption = Format(0, ".")
End Sub
' 数字键 (0-9) 的 Click 事件过程
' 向显示中的数追加新数
Private Sub Number_Click(Index As Integer)
If LastInput > "NUMS" Then
Readout = Format(0, ".")
DecimalFlag = False
End If
If DecimalFlag Then
Readout = Readout + Number(Index).Caption
Else
Readout = Left(Readout, InStr(Readout, Format(0, ".")) - 1) + Number(Index).Caption + Format(0, ".")
End If
If LastInput = "NEG" Then Readout = "-" & Readout
LastInput = "NUMS"
End Sub
' 运算符 (+, -, x, /, =) 的 Click 事件过程
' 如果接下来的按键是数字键，增加 NumOps。
' 如果有一个操作数，则设置 Op1。
' 如果有两个操作数，则将 Op1 设置为 Op1 与
' 当前输入字符串的运算结果，并显示结果
Private Sub Operator_Click(Index As Integer)
TempReadout = Readout
If LastInput = "NUMS" Then
NumOps = NumOps + 1
End If
Select Case NumOps
Case 0
If Operator(Index).Caption = "-" And LastInput > "NEG" Then
Readout = "-" & Readout
LastInput = "NEG"
End If
Case 1
Op1 = Readout
If Operator(Index).Caption = "-" And LastInput > "NUMS" And OpFlag > "=" Then
Readout = "-"
LastInput = "NEG"
End If
Case 2
Op2 = TempReadout
Select Case OpFlag
Case "+"
Op1 = CDbl(Op1) + CDbl(Op2)
Case "-"
Op1 = CDbl(Op1) - CDbl(Op2)
Case "X"
Op1 = CDbl(Op1) * CDbl(Op2)
Case "/"
If Op2 = 0 Then
MsgBox "除数不能为 0", 48, "计算器"
Else
Op1 = CDbl(Op1) / CDbl(Op2)
End If
Case "="
Op1 = CDbl(Op2)
Case "%"
Op1 = CDbl(Op1) * CDbl(Op2)
End Select
Readout = Op1
NumOps = 1
End Select
If LastInput > "NEG" Then
LastInput = "OPS"
OpFlag = Operator(Index).Caption
End If
End Sub
' 百分比键 (%) 的 Click 事件过程
' 计算并显示第一个操作数的百分数
Private Sub Percent_Click()
Readout = Readout / 100
LastInput = "Ops"
OpFlag = "%"
NumOps = NumOps + 1
DecimalFlag = True
End Sub
1、创建控件组的方法首先创建一个命令按钮，调整其大小（觉得合适就行），名称为Command1，Caption 属性为数字 0 ；然后进行“复制”和“粘贴”，当选择“粘贴”时，出现对话框提示已有一个同名控件，询问是否创建控件组，选择“是”后，即创建了一个名为“Command”的控件组。
这时，第一个按钮的Index属性值默认为“0”，第二个的Index属性值自动设为“1”，并且大小与第一个按钮相同，只需修改其 Caption 属性为数字“1”并将其拖至合适位置即可。此后继续使用“粘贴”的方法建立其他控件组中其余按钮，共20个按钮，每建立一个，就将它拖到合适处，并修改相应的Caption属性值。
2、各控件组其属性设置如下：
设置效果如下图所示：
二、编写代码
Dim s1 As Single， s2 As Single， ysf As String
‘定义两个单精度数变量用与存放参与运算的数，一个字符型存放运算符
Private Sub Command1_Click（Index As Integer）
Text1.Text = Text1.Text & Command1（Index）.Caption ’将command1的单击事件与文本框显示的内容连接
End Sub
Private Sub Command2_Click（）
Text1.Text = Text1.Text + “。”
If （InStr（Text1.Text， “。”） = 1） Then ‘第一位不能为小数
Text1.Text = “”
End If
If InStr（Text1.Text， “。”） 《 Len（Text1.Text） Then ’防止出现两个小数点
Text1.Text = Left
（Text1.Text， Len（Text1.Text） - 1）
End If
End Sub
Private Sub
Command3_Click（）
s2 = Val（Text1.Text） ‘开始加减乘除运算
Select Case ysf Case “+”
Text1.Text = s1 + s2
Case “-”
Text1.Text = s1 - s2
Case “*”
Text1.Text = s1 * s2
Case “/”
If s2 = 0 Then
MsgBox “分母不能为零！”
Text1.Text = “”
Else
Text1.Text = s1 / s2 End If End Select
Text1 = IIf（Left（Text1.Text， 1） = “。”， 0 & Text1.Text， Text1.Text） ‘
这个很关键，如果没有这个的话，得出小于1的小数前面没有0
End Sub
Private Sub Command4_Click（）
If Text1.Text = “” Then ’文本为空就结束
Exit Sub
End If
Text1.Text = Left（Text1.Text， Len（Text1.Text） - 1） ‘文本退一格
End Sub
Private Sub Command5_Click（）
Text1.Text = “” ’清除当前框内文本
End Sub
Private Sub Command6_Click（Index As Integer）
s1 = Val（Text1.Text） ‘将s1隐藏起来 ysf = Command6（Index）.Caption
Text1.Text = “”
End Sub
Private Sub Command7_Click（）
If Left（Text1.Text， 1） 《》 “-” Then ’判断作为负数
Text1.Text = “-” & Text1.Text
Else
Text1.Text = Right（Text1.Text， Len（Text1.Text） - 1）
End If
End Sub
Private Sub Command8_Click（）
Text1.Text = Text1.Text * Text1.Text ‘平方
End Sub
拓展资料Visual Basic（VB）是由微软公司开发的包含环境的事件驱动编程语言。它源自于BASIC编程语言。VB拥有图形用户界面（GUI）和快速应用程序开发（RAD）系统，可以轻易的使用DAO、RDO、ADO连接数据库，或者轻松的创建ActiveX控件。程序员可以轻松地使用VB提供的组件快速创建一个应用程序。
参考链Visual Basic——百度百科接
VB 加密与解密的程序代码
加密：
Private Function JiaMi(ByVal varPass As String) As String '参数varPass是需要加密的文本内容
Dim varJiaMi As String * 20
Dim varTmp As Double
Dim strJiaMi As String
Dim I
For I = 1 To Len(varPass)
varTmp = AscW(Mid$(varPass, I, 1))
varJiaMi = Str$(((((varTmp * 1.5) / 5.6) * 2.7) * I))
strJiaMi = strJiaMi & varJiaMi
Next I
JiaMi = strJiaMi
End Function解密函数：
Private Function JieMi(ByVal varPass As String) As String '参数varPass是需要解密的密文内容
Dim varReturn As String * 20
Dim varConvert As Double
Dim varFinalPass As String
Dim varKey As Integer
Dim varPasslenth As Long
varPasslenth = Len(varPass)For I = 1 To varPasslenth / 20
varReturn = Mid(varPass, (I - 1) * 20 + 1, 20)
varConvert = Val(Trim(varReturn))
varConvert = ((((varConvert / 1.5) * 5.6) / 2.7) / I)
varFinalPass = varFinalPass & ChrW(Val(varConvert))
Next I
JieMi = varFinalPass
End Function
扩展资料：注意事项
编写加密程序，将用户输入的一个英文句子加密为加密字符串，然后输出加密字符串。假设句子长度不超过100个字符。
根据给定的句子加密函数原型SentenceEncoding，编写函数SentenceEncoding调用给定的字符加密函数CharEncoding完成句子加密。
然后，编写主程序提示用户输入英文句子，然后调用函数SentenceEncoding对句子加密，最后输出加密后的句子。
字符加密规则为大写字母和小写字母均加密为其补码, 我们定义ASCII码值相加为’A’+’Z’即155的两个大写字母互为补码，ASCII码值相加为’a’+’z’即219的两个小写字母互为补码。
空格用@代替,句号以#代替,其它字符用句点代替。
函数原型：
void SentenceEncoding(char *soure,char *code);
功能：对待加密字符串source加密后保存加密字符串到code.
参数：char *soure，指向待加密句子的字符串指针；
char *code 指向加密字符串的字符串指针；
字符加密函数代码。
VB程序代码编写
Private Sub Form_Click()
Dim i As Integer
For i = 1 To 10
Dim n As Integer
n = (100 - 10 + 1) * Rnd + 10
Print n
Next
End Sub
Private Sub Command1_Click()
For i = 1 To 10
Print (Int(Rnd * 91) + 10) * (-1) ^ (Int(Rnd * 2) + 1);
Next
Print
End Sub
Private Sub Form_Click()
Dim n As Integer
randomize
For i = 1 To 10
n = (91) * Rnd + 10
Print n
Next
End Sub
编VB程序（详细代码）
在窗体上增加个文本框即可，代码如下，不知道是否是你想要的那种，希望能帮到你。
Option
Explicit
Dim
i
As
Long
Private
Sub
Form_Click()
i
=
i
+
1
Text1.Text
=
"你已经点击了"
&
i
&
"次了！"
End
Sub
Private
Sub
Form_Load()
i
=
0
End
Sub
vb的简单代码，
'所有控件在Form_Load中，4个text，6个标签，1个按钮
Option Explicit
Dim lngTime As Long, lngNN As Long, lngMax As Long
Private Sub Command1_Click()
Randomize
Timer1.Enabled = True
lngTime = 60
Label3.Caption = "剩余时间：" & lngTime & "秒"
Command1.Enabled = False
initTxt
lngNN = 0
End Sub
Private Sub Form_Load()
Text1.Text = ""
Text2.Text = ""
Text3.Text = ""
Text1.Locked = True
Text2.Locked = True
Command1.Caption = "开始"
Timer1.Interval = 1000
Label1.Caption = "+"
Label2.Caption = "="
Label3.Caption = ""
Label4.Caption = "加数最大值为："
Label5.Caption = ""
Label6.Caption = ""
Timer1.Enabled = False
lngMax = Val(Text4.Text)
End Sub
Private Sub initTxt()
Text1.Text = Int((lngMax * Rnd) + 1)
Text2.Text = Int((lngMax * Rnd) + 1)
Text3.Text = ""
Text3.SetFocus
End Sub
Private Sub Text3_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
If Val(Text1.Text) + Val(Text2.Text) = Val(Text3.Text) Then
lngNN = lngNN + 1
Label5.Caption = "√"
Label6.Caption = "正确" & lngNN & "道"
Else
Label5.Caption = "×"
End If
Open App.Path & "\test.txt" For Append As #1
Print #1, Text1.Text; "+"; Text2.Text; "="; Text3.Text
Close
initTxt
ElseIf KeyAscii < 48 Or KeyAscii > 57 Then
KeyAscii = 0
End If
End Sub
Private Sub Text4_Change()
If Len(Text4) Then
If Not IsNumeric(Text4.Text) Then
lngMax = 100
Text4.Text = lngMax
Else
lngMax = Val(Text4.Text)
End If
End If
End Sub
Private Sub Timer1_Timer()
lngTime = lngTime - 1
Label3.Caption = "剩余时间：" & lngTime & "秒"
If lngTime = 0 Then
Command1.Caption = "继续"
Command1.Enabled = True
Timer1.Enabled = False
Text1.Text = ""
Text2.Text = ""
Text3.Text = ""
Label5.Caption = ""
Open App.Path & "\test.txt" For Append As #1
Print #1, Label6.Caption
Close
End If
End Sub