listview控件，在执行itemclick事件后弹出窗口，但是关闭窗口之后，控件中的项目随着鼠标的移动而移动？

向Listview发送一个鼠标左键弹起的消息就可以了:

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_LBUTTONUP = &H202

Private Sub Form_Load()
With ListView1
.LabelEdit = lvwManual
.ListItems.Add , , "aaa"
.ListItems.Add , , "bbb"
End With
End Sub

Private Sub ListView1_ItemClick(ByVal Item As MSComctlLib.ListItem)
If Item.Text = "aaa" Then
Form2.Show vbModal '如果form2以非模式方式显示，不会出现楼主所说的问题
'如果form2是以模式方式显示，则在鼠标左键按下时激发ItemClick事件，但Form2显示出来，Listview不会再接收鼠标左键弹起的消息，所以当form2关闭后，ListView还会“以为”左键处于按下状态，所以移动鼠标时项目就会跟着鼠标移动
'这里强制向Listview发送一个鼠标弹起的消息解除拖动状态
SendMessage ListView1.hwnd, WM_LBUTTONUP, 0, 0
End If
End Sub