这段代码可以放在form_load事件中，当做一个多窗口的系统时，最好放到一个模块文件中，这样在其它窗口中都可以调用这个cn连接。
下面是具体的窗口代码：
VERSION 5.00
Object= "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "comdlg32.ocx"
Object= "{3B7C8863-D78F-101B-B9B5-04021C009402}#1.2#0"; "richtx32.ocx"
Begin VB.Form finput
BorderStyle = 0 'None
Caption = "文档输入"
ClientHeight = 6240
ClientLeft = 0
ClientTop = 0
ClientWidth = 8955
ControlBox = 0 'False
LinkTopic = "Form1"
MDIChild = -1 'True
ScaleHeight = 6240
ScaleWidth = 8955
ShowInTaskbar = 0 'False
Begin MSComDlg.CommonDialog CommonDialog1
Left = 8040
Top = 3840
_ExtentX = 847
_ExtentY = 847
_Version = 393216
End
Begin VB.ComboBox Combo1
Height = 300
Left = 7080
TabIndex = 10
Top = 480
Width = 1335
End
Begin VB.CommandButton Command3
Caption = "关闭"
Height = 375
Left = 5280
TabIndex = 8
Top = 5640
Width = 1095
End
Begin VB.CommandButton Command2
Caption = "保存"
Height = 375
Left = 2520
TabIndex = 7
Top = 5640
Width = 1095
End
Begin VB.CommandButton Command1
Caption = "浏览"
Height = 255
Left = 8040
TabIndex = 6
Top = 4800
Width = 735
End
Begin VB.TextBox Text2
Height = 375
Left = 1200
TabIndex = 5
Top = 4800
Width = 6375
End
Begin RichTextLib.RichTextBox RichTextBox1
Height = 3615
Left = 1200
TabIndex = 3
Top = 960
Width = 6375
_ExtentX = 11245
_ExtentY = 6376
_Version = 393217
Enabled = -1 'True
TextRTF = $"finput.frx":0000
End
Begin VB.TextBox Text1
Height = 375
Left = 1200
TabIndex = 2
Top = 443
Width = 4695
End
Begin VB.Label Label4
Caption = "类别"
Height = 255
Left = 6240
TabIndex = 9
Top = 480
Width = 615
End
Begin VB.Label Label3
Caption = "图片"
Height = 255
Left = 480
TabIndex = 4
Top = 4800
Width = 495
End
Begin VB.Label Label2
Caption = "内容"
Height = 255
Left = 480
TabIndex = 1
Top = 960
Width = 495
End
Begin VB.Label Label1
Caption = "标题"
Height = 255
Left = 480
TabIndex = 0
Top = 503
Width = 495
End
End
Attribute VB_Name = "finput"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Private Sub Command1_Click()
CommonDialog1.DefaultExt = App.Path
CommonDialog1.Filter = "Pictures (*.bmp;*.jpg;*.gif) *.bmp;*.jpg;*.gif" '注意要加引号
CommonDialog1.ShowOpen
Text2.Text = CommonDialog1.FileName
End Sub
'保存文档的标题，和文档的内容，以及相应的图片
Private Sub Command2_Click()
'判断是否所写的文档是否已经存在数据库了，如果没有，则保存，否则
'不能保存（利用一个"临时rs"查询标题）
Dim subject, sql As String
Dim temp_photo As Stream
Dim rs As New ADODB.Recordset
Dim rs1 As New ADODB.Recordset '定义rs1得到类别的id
Dim class_id As Integer '定义得到类别的ID号
subject = Trim(Text1.Text) '获得标题
sql = "select * from paper where subject='" + subject + "'"
'开始查询
rs.Open sql, cn, adOpenDynamic, adLockPessimistic
'判断标题是否存在
If rs.EOF Then '文档不存在,开始保存
Dim tempdate As Date '临时时间变量
tempdate = Date
rs.AddNew
'得到类别的ID
sql = "select cl_number,class from class where class='" + Combo1.Text + "'"
rs1.Open sql, cn, adOpenDynamic, adLockPessimistic
rs("class") = rs1("cl_number")
rs1.Close '关闭rs1
rs("subject") = subject
rs("content") = RichTextBox1.Text
If Trim(Text2.Text) <> "" Then '假如有图片，开始得到图片文件
Dim image_data() As Byte '定义图片保存的变量
Open Trim(Text2.Text) For Binary As #1
ReDim image_data(LOF(1) - 1)
Get #1, , image_data()
rs("photo").AppendChunk image_data()
End If
rs("inputtime") = tempdate
rs("modifytime") = tempdate
rs.Update '可能出现保存不成功的现象，所以要考虑可能会出现错误
MsgBox ("保存成功!") '保存成功
Text1.Text = ""
RichTextBox1.Text = ""
Text2.Text = "" '此处清空选择图片的框
Else '存在，不能保存，显示错误信息
MsgBox ("文档已经存在，不能保存，请修改！")
End If
rs.Close '关闭结果集
End Sub
Private Sub Command3_Click()
Unload Me
End Sub
Private Sub Form_Load()
Me.Left = 0
Me.Top = 0
fmain.Width = Me.Width + 340
fmain.Height = Me.Height + 1550
'显示文档的类别
Dim rs As New ADODB.Recordset
Dim sql As String
sql = "select * from class"
rs.Open sql, cn, 1, 1
Do While Not rs.EOF '类别不空，则添加进去,对应类别的number为索引
Combo1.AddItem rs("class")
rs.MoveNext
Loop
If rs.RecordCount <> 0 Then '只有查询结果集不为空时，才能设定显示第一项,利用纪录总数不为0判定
Combo1.ListIndex = 0 '不能用not rs.eof判定，因为现在cursor已经到了最后
End If
rs.Close
End Sub
当然，在上面这段代码中，还用到了另一个表(表名为class),字段如下：
字段名 类型 意义
class 文本 文档类别的名称
cl_number 数字 类别的编号
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