add_control_runtime.frm

vb数据库编程练习,学习完后可以举一反三。请大家多多指教。

VERSION 5.00
Begin VB.Form Form1 
   AutoRedraw      =   -1  'True
   Caption         =   "Run Time Demo"
   ClientHeight    =   4620
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   6405
   LinkTopic       =   "Form1"
   ScaleHeight     =   4620
   ScaleWidth      =   6405
   StartUpPosition =   3  'Windows Default
   WindowState     =   2  'Maximized
   Begin VB.CommandButton Command5 
      Caption         =   "Remove &Array"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   5400
      TabIndex        =   5
      Top             =   4440
      Width           =   2055
   End
   Begin VB.CommandButton Command4 
      Caption         =   "&Create Label "
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   435
      Left            =   5400
      TabIndex        =   3
      Top             =   3840
      Width           =   2055
   End
   Begin VB.CommandButton Command3 
      Caption         =   "E&xit"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   5520
      TabIndex        =   2
      Top             =   1920
      Width           =   1695
   End
   Begin VB.CommandButton Command2 
      Caption         =   "&Remove Control"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   5040
      TabIndex        =   1
      Top             =   1080
      Width           =   3135
   End
   Begin VB.CommandButton Command1 
      Caption         =   "&Add Control Dynamically"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   5040
      TabIndex        =   0
      Top             =   480
      Width           =   3135
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Caption         =   "Hello"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   300
      Index           =   0
      Left            =   1440
      TabIndex        =   4
      Top             =   4200
      Width           =   540
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim t As Long
Dim l As Long
Dim i As Integer
Private Sub Command1_Click()
    On Error GoTo sa
Dim ctl As Control
Dim ctlType As String
Dim ctlName As String
i = i + 1
    'ctlType = "VB." & InputBox("Enter the Type of Control")
    'ctlName = InputBox("Enter the Name of Control")
            Set ctl = Form1.Controls.Add("VB.TextBox", "Text" & i, Form1)
    'Set ctl = Form1.Controls.Add(ctlType, ctlName, Form1)
With ctl
 .Visible = True
 .Top = 800 * i
 .Left = 400
 .Width = 4000
 .Height = 400
 .Font.Size = 12
 .Text = "Developed By Sachin Dhillan"
 .Appearance = 0
End With
 Exit Sub
sa:
    MsgBox Err.Description, vbInformation, "Error"
End Sub


Private Sub Command2_Click()
On Error GoTo er
If i = 0 Then Exit Sub
Form1.Controls.Remove "Text" & i
i = i - 1
Exit Sub
er:
MsgBox Err.Description, , "Warning"
End Sub

Private Sub Command3_Click()
'If UCase(un.Text) = ("SACHIN") Then
End
'Else
'MsgBox "Sorry User" & vbCrLf & "Enter Right Name", vbCritical, "Warning"
'un.SetFocus
'un.SelStart = 0
'un.SelLength = Len(un.Text)
'End If
End Sub

Private Sub Command4_Click()
    t = t + 500
    l = 500
On Error GoTo er
Load Label1(Label1.UBound + 1)
Debug.Print t
Label1(Label1.UBound).Top = t
Label1(Label1.UBound).Left = l
Label1(Label1.UBound).Caption = "Dynamically genetrated Label By array"
Label1(Label1.UBound).BackColor = vbBlue
Label1(Label1.UBound).ForeColor = vbRed
Label1(Label1.UBound).Font.Size = 12
Label1(Label1.UBound).AutoSize = True
Label1(Label1.UBound).Visible = True
Exit Sub
er:
MsgBox Err.Description, , "Warning"
End Sub

Private Sub Command5_Click()
On Error GoTo er
If t = 500 Then Exit Sub
Unload Label1(Label1.UBound)
t = t - 500
Exit Sub
er:
MsgBox Err.Description, , "Warning"
End Sub

Private Sub Form_Load()
t = 500
i = 0
End Sub

Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
If UnloadMode <> vbFormCode Then
MsgBox "Sorry User" & vbCrLf & "Use the Exit button to close the Form", vbCritical, "Warning"
Cancel = True
End If
End Sub
Private Sub un_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
Command2_Click
End If
End Sub