在VB的类模块中使用定时器
长久以来，由于不能直接获得VB类成员函数指针，因为无法在VB的类模块中直接使用定时器控件或定时器API，基于俺编写的获得类成员函数指针的函数，俺编写了这个带定时器功能的类，希望给朋友们一些启发。
一、新建一个类，类名称为clsTimer，类代码如下：
Option Explicit
'* ******************************************** *
'* 模块名称：clsTimer.cls
'* 功能：在VB类模块中使用计时器
'* 作者：lyserver
'* ******************************************** *
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, _
Source As Any, ByVal Length As Long)
Private Declare Function SetTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long, _
ByVal uElapse As Long, ByVal lpTimerFunc As Long) As Long
Private Declare Function KillTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long) As Long
Dim m_idTimer As Long
Dim m_Enabled As Boolean
Dim m_Interval As Long
Dim m_lTimerProc As Long
Private Sub Class_Initialize()
m_Interval = 0
m_lTimerProc = GetClassProcAddr(8)
End Sub
Private Sub Class_Terminate()
If m_idTimer <> 0 Then KillTimer 0, m_idTimer
End Sub
Public Property Get Interval() As Long
Interval = m_Interval
End Property
Public Property Let Interval(ByVal New_Value As Long)
If New_Value >= 0 Then m_Interval = New_Value
End Property
Public Property Get Enabled() As Boolean
Enabled = m_Enabled
End Property
Public Property Let Enabled(ByVal New_Value As Boolean)
m_Enabled = New_Value
If m_idTimer <> 0 Then KillTimer 0, m_idTimer
If New_Value And m_Interval > 0 Then
m_idTimer = SetTimer(0, 0, m_Interval, m_lTimerProc)
End If
End Property
Private Function GetClassProcAddr(ByVal Index As Long, Optional ParamCount As Long = 4, Optional HasReturnValue As Boolean) As Long
Static lR
相关文档：
传统方法是遍历一遍
如果listbox 项目过多
明显速度不行
好方法是通过sendmessge发消息给listbox让他把选中项目直接传到参数数组中
You can use the SendMessage() API function instead.
As
you probably know, this function lets you send a message to one or more
windows. The declaration statement conforms ......
Option Explicit
Function Delete3(Arr As Variant) As Variant
Dim i As Integer
For i = LBound(Arr) To UBound(Arr)
If i > UBound(Arr) Then Exit For
If Arr(i) = 3 Then
Do
Dim j As Integer
For j = i To UBound(Arr) - 1
......
'**************************读图片文件**************************************
Sub GetPicfromDB(cn As ADODB.Connection)
On Error Resume Next
Dim ......
今天做一个VB程序的自显注册码。我也不知道该怎么叫，就是找到出现注册码的地方，然后用对话框弹出来。说白了就是用MessageBox把一个字符串给弹出来（没追求阿。。。）
为了有点追求，今天不导入user32里面的API，而是把VB里面自带的Msgbox函数给挖出来调用，就是引用MSVBVM60.rtcMsgBox函数。我� ......
使用VC编写VB使用DLL
一、在函数定义前必须加上extern "c"，_stdcall关键字。
extern "C" int _stdcall Sum(int x,int y)
{
return x+y;
}
二、DLL的.def文件中必须加上入口函数
EXPORTS
sample @1
......
