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vb.net读取usb vbnet config文件读取

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VB.NET怎样把USB摄像头在显示器上输出的实时画面（像素信息），引入到数据库.用directshow获取帧缓存,转换为标准图像格式(比如jpg,png这些),存储到数据库vb.net读取usb的image字段里就行vb.net读取usb了.
vb.net 如何判断u盘是否接入窗体上添加两个标签：Label1和Label2
下面代码经过VB 2005测试通过 。
Imports System.IO
Public Class Form1
Public Const WM_DEVICECHANGE = H219
Public Const DBT_DEVICEARRIVAL = H8000
Public Const DBT_CONFIGCHANGECANCELED = H19
Public Const DBT_CONFIGCHANGED = H18
Public Const DBT_CUSTOMEVENT = H8006
Public Const DBT_DEVICEQUERYREMOVE = H8001
Public Const DBT_DEVICEQUERYREMOVEFAILED = H8002
Public Const DBT_DEVICEREMOVECOMPLETE = H8004
【vb.net读取usb vbnet config文件读取】Public Const DBT_DEVICEREMOVEPENDING = H8003
Public Const DBT_DEVICETYPESPECIFIC = H8005
Public Const DBT_DEVNODES_CHANGED = H7
Public Const DBT_QUERYCHANGECONFIG = H17
Public Const DBT_USERDEFINED = HFFFF
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
If m.Msg = WM_DEVICECHANGE Then
Select Case m.WParam
Case WM_DEVICECHANGE
Case DBT_DEVICEARRIVAL 'U盘插入
Dim s() As DriveInfo = DriveInfo.GetDrives
For Each drive As DriveInfo In s
If drive.DriveType = DriveType.Removable Then
Label2.Text = "U盘已经插入！盘符为:" + drive.Name.ToString()
End If
Next
Case DBT_CONFIGCHANGECANCELED
Case DBT_CONFIGCHANGED
Case DBT_CUSTOMEVENT
Case DBT_DEVICEQUERYREMOVE
Case DBT_DEVICEQUERYREMOVEFAILED
Case DBT_DEVICEREMOVECOMPLETE 'U盘卸载
Label2.Text = "U盘已经拔出！"
Case DBT_DEVICEREMOVEPENDING
Case DBT_DEVICETYPESPECIFIC
Case DBT_DEVNODES_CHANGED
Case DBT_QUERYCHANGECONFIG
Case DBT_USERDEFINED
End Select
End If
MyBase.WndProc(m)
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Label1.Text = "请操作U盘！"
Label2.Text = ""
End Sub
End Class
vb.net 读取扫描枪USB接口数据的实例USB比较难抓数据 ， 建议是USB模拟串口，或者直接就是串口，这样数据比较好抓 。
USB上传模式是鼠标光标在哪数据就上传在哪，所以你抓USB的数据的很难！
X猫-思刊办公专营店
vb.net读取usb的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于vbnet config文件读取、vb.net读取usb的信息别忘了在本站进行查找喔 。

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