提供
单Item函数：
cmdDel_Click
cmdAdd_Click
多Item函数：
cmdDelAll_Click
cmdAddAll_Click
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'Option Explicit

'author:nyb
'Time:2002-04-05
'传入list1,list2，然后我们可以对list1，和list2中的item进行处理.
'*All areas of code where modifications are necessary
'*to integrate this object with a project are documented
'with comments denoted by Note:.
'*To locate these comments,search for ‘*NOTE::.
'****************************************************************************************

Public Sub cmdDelAll_Click(List1 As ListBox, List2 As ListBox) '<<
'*purpose: delete all list2.item
'*Accept: list1 没有用，list2处理对象
For i = (List2.ListCount - 1) To 0 Step -1
List2.RemoveItem i
Next i
End Sub
Public Sub CmdAdd2To1_Click(List1 As ListBox, List2 As ListBox, List3 As ListBox) '>>
'*purpose: all item of list1 and list2 are inputed to list3
'*Accept: list1,list2
For i = 0 To (List1.ListCount - 1)
List3.AddItem List1.List(i)
Next i
For i = 0 To (List2.ListCount - 1)
List3.AddItem List2.List(i)
Next i
End Sub

Public Sub cmdAddAll_Click(List1 As ListBox, List2 As ListBox, Index As Integer) '>>
'*purpose: add all item of list1 inputed to list2.if item had been there, It won't be inputed
'*Accept: list1,list2
If List2.ListCount = 0 Then
For i = 0 To (List1.ListCount - 1)
List2.AddItem List1.List(i)
Next i
Else
For i = 0 To (List1.ListCount - 1)
Flag = CheckSelected(List1, List2, List1.List(i))
If Flag = "notbe" Then List2.AddItem List1.List(i)
Next i
End If
End Sub


Public Sub cmdDel_Click(List1 As ListBox, List2 As ListBox) '<---
'*purpose: the selected items of list2 are cleared
'*Accept: list1 没有用，list2处理对象
Dim i As Integer
If List2.SelCount > 0 Then
For i = (List2.ListCount - 1) To 0 Step -1
If List2.Selected(i) = True Then List2.RemoveItem i
Next i
End If
End Sub

Public Sub cmdadd_Click(List1 As ListBox, List2 As ListBox, Index As Integer) '--->
'*purpose: the selected items of list1 is inputed into list2
' list2为空，list2又可以多选，那么items selected in list1 are inputed to list2
' list2不为空，list2又可以多选，那么先检查item是否在list2中，如果在，那么就不添入list2
' list2设为单选，那么list2只添加list1中的的第一选中项
'*Accept: list1 选中的项目，list2为要加入的listbox
Dim i As Integer
Dim Flag As String

If Index > 0 Then
If List2.ListCount >= 1 Then
If Index = 2 Then
If List2.ListCount >= 2 Then
If List1.MultiSelect = 0 Then
MsgBox "只能选定两期对比！", vbExclamation, "操作提示！"
Exit Sub
End If
End If
End If
End If
End If

If List2.ListCount = 0 And List2.MultiSelect = 2 Then
For i = 0 To (List1.ListCount - 1)
If List1.Selected(i) = True Then List2.AddItem List1.List(i)
Next i
ElseIf List2.ListCount > 0 And List2.MultiSelect = 2 Then
For i = 0 To (List1.ListCount - 1)
Flag = CheckSelected(List1, List2, List1.List(i))
If List1.Selected(i) = True And Flag = "notbe" Then List2.AddItem List1.List(i)