vb.net连接摄像头

怎么用图片框,. >xS|1dIF\  
直接连接摄像头或着 KNies  
数码相机之类的硬件. 't>xL  
SH\v[G mB  
没问题，我给你代码： &=;1yn  
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这是cam.vb,请自行组合起来 V_4 "oC8$  
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Imports System i u>BW?&_  
Imports System.Runtime.InteropServices YJPz'OMNg  
Imports System.Drawing = L=n YX  
Imports System.Drawing.Imaging /ne$dj/
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Public Class Cam 6^)c3 l  
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    Private Const WM_USER As Integer = &H400 jRlO0v D  
    Private Const WS_CHILD As Integer = &H40000000 /W~|Go(eyO  
    Private Const WS_VISIBLE As Integer = &H10000000 mce_*S+=t  
    Private Const WM_CAP_START As Integer = WM_USER 0`EcW22dZ  
    Private Const WM_CAP_STOP As Integer = WM_CAP_START + 68 6JB+t3xT/  
    Private Const WM_CAP_DRIVER_CONNECT As Integer = WM_CAP_START + 10 X+?9V@zcA  
    Private Const WM_CAP_DRIVER_DISCONNECT As Integer = WM_CAP_START + 11 UFrx^Os+k  
    Private Const WM_CAP_SAVEDIB As Integer = WM_CAP_START + 25 C1f&\z:;H  
    Private Const WM_CAP_GRAB_FRAME As Integer = WM_CAP_START + 60 I> FRmt)  
    Private Const WM_CAP_SEQUENCE As Integer = WM_CAP_START + 62 6/zcpn;,  
    Private Const WM_CAP_FILE_SET_CAPTURE_FILEA As Integer = WM_CAP_START + 20 ^'I6Z_<T  
    Private Const WM_CAP_SEQUENCE_NOFILE As Integer = WM_CAP_START + 63 p}*dgF(m  
    Private Const WM_CAP_SET_OVERLAY As Integer = WM_CAP_START + 51 -#
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    Private Const WM_CAP_SET_PREVIEW As Integer = WM_CAP_START + 50 igLal'  
    Private Const WM_CAP_SET_CALLBACK_VIDEOSTREAM As Integer = WM_CAP_START + 6 YDkd O  
    Private Const WM_CAP_SET_CALLBACK_ERROR As Integer = WM_CAP_START + 2 9"[OA%;:ev  
    Private Const WM_CAP_SET_CALLBACK_STATUSA As Integer = WM_CAP_START + 3 Vp1=Zv8v  
    Private Const WM_CAP_SET_CALLBACK_FRAME As Integer = WM_CAP_START + 5 >s~}f@xP{  
    Private Const WM_CAP_SET_SCALE As Integer = WM_CAP_START + 53 U2`$w86.*  
    Private Const WM_CAP_SET_PREVIEWRATE As Integer = WM_CAP_START + 52 gR8z:*,.  
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    Public Const WM_CAP_GET_CAPSTREAMPTR = WM_CAP_START + 1 O uissYJH  
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    Public Const WM_CAP_SET_CALLBACK_STATUS = WM_CAP_START + 3 O%H5[  
    Public Const WM_CAP_SET_CALLBACK_YIELD = WM_CAP_START + 4 _-?47U{p  
    Public Const WM_CAP_SET_CALLBACK_WAVESTREAM = WM_CAP_START + 7 7* &
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    Public Const WM_CAP_GET_USER_DATA = WM_CAP_START + 8 rbKl.;Ow  
    Public Const WM_CAP_SET_USER_DATA = WM_CAP_START + 9 W#e zV  
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    Public Const WM_CAP_DRIVER_GET_NAME = WM_CAP_START + 12 ne 5N+^<  
    Public Const WM_CAP_DRIVER_GET_VERSION = WM_CAP_START + 13 BjCZFdLJB  
    Public Const WM_CAP_DRIVER_GET_CAPS = WM_CAP_START + 14 g{U>D'/)~  
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    Public Const WM_CAP_FILE_SET_CAPTURE_FILE = WM_CAP_START + 20 LjIFG4  
    Public Const WM_CAP_FILE_GET_CAPTURE_FILE = WM_CAP_START + 21 10%NKg=  
    Public Const WM_CAP_FILE_ALLOCATE = WM_CAP_START + 22 Dl9By  
    Public Const WM_CAP_FILE_SAVEAS = WM_CAP_START + 23 l q-]0C  
    Public Const WM_CAP_FILE_SET_INFOCHUNK = WM_CAP_START + 24 hcOF&RS'^  
    Public Const WM_CAP_FILE_SAVEDIB = WM_CAP_START + 25 Q#:l:"MG  
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    Public Const WM_CAP_EDIT_COPY = WM_CAP_START + 30 i1=|:^i:  
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    Public Const WM_CAP_SET_AUDIOFORMAT = WM_CAP_START + 35 \7. 9~2,  
    Public Const WM_CAP_GET_AUDIOFORMAT = WM_CAP_START + 36 `ORY0
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    Public Const WM_CAP_DLG_VIDEOFORMAT = WM_CAP_START + 41 *>wMw| M\C  
    Public Const WM_CAP_DLG_VIDEOSOURCE = WM_CAP_START + 42 L{ .K' `sx  
    Public Const WM_CAP_DLG_VIDEODISPLAY = WM_CAP_START + 43 L%RqgT v  
    Public Const WM_CAP_GET_VIDEOFORMAT = WM_CAP_START + 44 z<>s4PWL  
    Public Const WM_CAP_SET_VIDEOFORMAT = WM_CAP_START + 45 e 6tW%8P,  
    Public Const WM_CAP_DLG_VIDEOCOMPRESSION = WM_CAP_START + 46 Fg{0}<F#B`  
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    Public Const WM_CAP_GET_STATUS = WM_CAP_START + 54 m{<=nDMFg  
    Public Const WM_CAP_SET_SCROLL = WM_CAP_START + 55 hJ2+jA$d4  
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    Public Const WM_CAP_GRAB_FRAME_NOSTOP = WM_CAP_START + 61 :QtdS)C  
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    Public Const WM_CAP_SET_SEQUENCE_SETUP = WM_CAP_START + 64 o}H.rkj\v  
    Public Const WM_CAP_GET_SEQUENCE_SETUP = WM_CAP_START + 65 Y~_ EI/*.  
    Public Const WM_CAP_SET_MCI_DEVICE = WM_CAP_START + 66 e*&_9KB&  
    Public Const WM_CAP_GET_MCI_DEVICE = WM_CAP_START + 67 p\4aJm  
    Public Const WM_CAP_ABORT = WM_CAP_START + 69 jq ea{7/  
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    Public Const WM_CAP_SINGLE_FRAME_OPEN = WM_CAP_START + 70 v3i
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    Public Const WM_CAP_SINGLE_FRAME_CLOSE = WM_CAP_START + 71 Y4[`Upic~  
    Public Const WM_CAP_SINGLE_FRAME = WM_CAP_START + 72 Oui]Rc9Cp  
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    Public Const WM_CAP_PAL_OPEN = WM_CAP_START + 80 '3-`{_O  
    Public Const WM_CAP_PAL_SAVE = WM_CAP_START + 81 a@ n eU~  
    Public Const WM_CAP_PAL_PASTE = WM_CAP_START + 82 g'- [s5y9  
    Public Const WM_CAP_PAL_AUTOCREATE = WM_CAP_START + 83 tU0+q5M  
    Public Const WM_CAP_PAL_MANUALCREATE = WM_CAP_START + 84  T 'x|_  
820]%s'@  
    '// Following added post VFW 1.1 [i~n^T%P ^  
    Public Const WM_CAP_SET_CALLBACK_CAPCONTROL = WM_CAP_START + 85 R(FVZ i3T  
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    '// Defines end of the message range 6%\"OVl0'  
    Public Const WM_CAP_END = WM_CAP_SET_CALLBACK_CAPCONTROL <J'\C5  
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    Private hWndC As IntPtr oc Z]Ia#  
    Private bStat As Boolean = False h*T1$7  
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    Private mControlPtr As IntPtr pPKW'"CC  
    Private mWidth As Integer j8&z &[  
    Private mHeight As Integer Eq?jDs`  
    Private mLeft As Integer XX^PpX +^
 
    Private mTop As Integer 0nCK'a  
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    <DllImport("avicap32.dll")> _ ;Nf e u  
    Private Shared Function capCreateCaptureWindowA(ByVal lpszWindowName() As Byte, ByVal dwStyle As Integer, ByVal x As Integer, ByVal y As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, ByVal hWndParent As IntPtr, ByVal nID As Integer) As IntPtr t!?<
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    End Function xscp'Xd  
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    <DllImport("avicap32.dll")> _ nsRGwBHqQC  
    Private Shared Function capGetVideoFormat(ByVal hWnd As IntPtr, ByVal psVideoFormat As IntPtr, ByVal wSize As Integer) As Integer vR> a/*  
    End Function +Z+L b[50~  
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    <DllImport("User32.dll")> _ 61f#/?.T  
    Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Long) As Boolean dHTh<27nj  
    End Function ;-<f=s Z  
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    Function capDlgVideoFormat() As Boolean  U/
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        capDlgVideoFormat = SendMessage(hWndC, WM_CAP_DLG_VIDEOFORMAT, 0, 0) pi]!Qg*L  
    End Function 0G>E*^=o.  
    Function capDlgVideoSource() As Boolean p+Bdeg[dP  
        capDlgVideoSource = SendMessage(hWndC, WM_CAP_DLG_VIDEOSOURCE, 0, 0) }Ygr}:kY  
    End Function 1 zM~L)@  
    Function capDlgVideoDisplay() As Boolean %vjY*&nM  
        capDlgVideoDisplay = SendMessage(hWndC, WM_CAP_DLG_VIDEODISPLAY, 0, 0) !b
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    End Function i078N/+  
    Function capDlgVideoCompression() As Boolean RKcNk+Xtg  
        capDlgVideoCompression = SendMessage(hWndC, WM_CAP_DLG_VIDEOCOMPRESSION, 0, 0) g4H =^[  
    End Function ZGq.k^@  
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'接上节 `/r^yru/W  
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    '/// <summary> ,eE$wu
 
    '/// 初始化摄像头 ]>~`}hOj  
    '/// </summary> YBJf<KuI  
    '/// <param name="handle">控件的句柄</param> q5(Q p
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    '/// <param name="left">开始显示的左边距</param> Dr^64p6  
    '/// <param name="top">开始显示的上边距</param> kUr 9  
    '/// <param name="width">要显示的宽度</param> YV}yc2  
    '/// <param name="height">要显示的长度</param> dm(1<gdE#u  
    Public Sub New(ByVal handle As IntPtr, ByVal left As Integer, ByVal top As Integer, ByVal width As Integer, ByVal height As Integer) |Q'j_Bf  
        mControlPtr = handle X]_@QA[;'  
        mWidth = width )PYQar+UoU  
        mHeight = height s760 Xx  
        mLeft = left 'c4`Dz 5W  
        mTop = top pMG'H{ Z.  
    End Sub j{=/6_  
X<6c=4r>N  
    '/// <summary> ~'XKiVm  
    '/// 开始显示图像 /hFWjT7]  
    '/// </summary>  8yHv%3  
    Public Sub Start() c& 2XwpL:  
        If bStat Then @MY}$TRR>  
            Return zJ uF3"  
        End If K:6 6&;9  
        bStat = True 2O,{9 W  
        Dim lpszName(99) As Byte [cSlPeUI  
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        hWndC = capCreateCaptureWindowA(lpszName, WS_CHILD Or WS_VISIBLE, mLeft, mTop, mWidth, mHeight, mControlPtr, 0) #x`w|i!o  
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        If hWndC.ToInt32() <> 0 Then :(50i!b.  
            SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0) ] ^R|I  
            SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0) ~'@]0$wT  
            SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0) Rf<jU}T&L  
            SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0) G LBEd|  
            SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0) G<Z_gwYq  
            SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0) U;@!z=+i=  
            SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0) Pptm@L\c  
            SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0) Vh<8U+60V  
        End If @F%(,r`AI  
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        Return }KwB|\  
    End Sub O7qFqL  
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    '/// <summary> B%9IL4  
    '/// 停止显示 N0] kB  
    '/// </summary> -<0GB  
    Public Sub [Stop]() F9w2# q5  
        SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0) DbG]V5v+  
        bStat = False 7vKk:  
    End Sub M?59<j+  
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    '/// <summary> |[H8So_  
    '/// 抓图 6"TUZ&qQ  
    '/// </summary> (38a_f5O  
    '/// <param name="path">要保存bmp文件的路径</param> KCvr=LR  
    Public Sub GrabImage(ByVal path As String) 76lPII hg  
        Dim hBmp As IntPtr = Marshal.StringToHGlobalAnsi(path) ~[U3"}_z  
        SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt64()) mk\QBHhM  
    End Sub Nt +Dv/  
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    '/// <summary> m4^xF /  
    '/// 录像 N\D _I !  
    '/// </summary> Ig0&j.]x  
    '/// <param name="path">要保存avi文件的路径</param> T4Ki :Di  
    Public Sub Kinescope(ByVal path As String) _9zm;z  
        Dim hBmp As IntPtr = Marshal.StringToHGlobalAnsi(path) LbA|:`  
        SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt64()) p&jo>ol9  
        SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0) !8 OcYmu  
    End Sub zZN=1=@'l  
DIsbTj=R  
    '/// <summary> I$ +t[}  
    '/// 停止录像 f Cp=K`h  
    '/// </summary> f@Q07R{  
    Public Sub StopKinescope() y/e4^(,t2  
        SendMessage(hWndC, WM_CAP_STOP, 0, 0) O*gbq m  
    End Sub %7oi`7h  
End Class 89 1y\  
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下面这个是测试窗体Form1.vb: >We~puq0v  
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Public Class Form1 @.-PhRu  
    Inherits System.Windows.Forms.Form >LwO9* +]  
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    Private cccap As Cam s\/0O lKT  
#Region " Windows 窗体设计器生成的代码 " hubat  
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    Public Sub New() t} GG Po  
        MyBase.New() *2 Gp &7.  
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        '该调用是 Windows 窗体设计器所必需的。 dS$wg??P  
        InitializeComponent() H8rz3 R  
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        '在 InitializeComponent() 调用之后添加任何初始化 Az|uy0`I  
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    End Sub \~( <yk"o  
v:p R  
    '窗体重写 dispose 以清理组件列表。 iqmw:aq`LT  
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) ",IGcw)<&D  
        If disposing Then r<~LM L  
            If Not (components Is Nothing) Then h`0R,n  
                components.Dispose() aP~e2~f  
            End If ;|MzgFB  
        End If iB|}0a s7  
        MyBase.Dispose(disposing) 8q#Kh46W0  
    End Sub `R}C R'B  
i"\TtTw}]o  
    'Windows 窗体设计器所必需的 Y qK#\l n  
    Private components As System.ComponentModel.IContainer I3nV-s!  
9516-t$:,  
    '注意: 以下过程是 Windows 窗体设计器所必需的 l t]08s=  
    '可以使用 Windows 窗体设计器修改此过程。 f*/ GEM]of  
    '不要使用代码编辑器修改它。 $v lE3O c  
    Friend WithEvents Button1 As System.Windows.Forms.Button bR=L>  
    Friend WithEvents picView As System.Windows.Forms.PictureBox oVy|$)  
    Friend WithEvents Button2 As System.Windows.Forms.Button _SOra51w  
    Friend WithEvents Button3 As System.Windows.Forms.Button ?ALn'Q;  
    Friend WithEvents Button4 As System.Windows.Forms.Button A/Zd! S!  
    Friend WithEvents Button5 As System.Windows.Forms.Button S?:HaN6  
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() ?wqP(=D2[  
        Me.picView = New System.Windows.Forms.PictureBox "ux^|Fo  
        Me.Button1 = New System.Windows.Forms.Button JcoQDQzL  
        Me.Button2 = New System.Windows.Forms.Button ^?\ aKRA_  
        Me.Button3 = New System.Windows.Forms.Button _9^&M(f  
        Me.Button4 = New System.Windows.Forms.Button G(YkW +  
        Me.Button5 = New System.Windows.Forms.Button 4c[ bI  
        Me.SuspendLayout() dzMu$KQJ7  
        ' 4DmEJy  
        'picView 0q?  
        ' 5#_x\EKc  
        Me.picView.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _ ! HA5)\  
                    Or System.Windows.Forms.AnchorStyles.Left) _ S*QS[WgT  
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles) k%_3tFEQc  
        Me.picView.Location = New System.Drawing.Point(16, 16) #88kaV  
        Me.picView.Name = "picView" ;%'Whjytc  
        Me.picView.Size = New System.Drawing.Size(640, 480) N[LAWx  
        Me.picView.TabIndex = 0 R6$>cY@*V  
        Me.picView.TabStop = False !7fKOUZ l  
        ' MEN<Ja.>X  
        'Button1 O aUE  
        ' N84X^L0)%  
        Me.Button1.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) l*93#\m
G  
        Me.Button1.Location = New System.Drawing.Point(244, 540) Ih?j;NV  
        Me.Button1.Name = "Button1" 3Y+[[[vbf  
        Me.Button1.Size = New System.Drawing.Size(56, 24) Z\j"t.F>{  
        Me.Button1.TabIndex = 1 q_b,^gQ  
        Me.Button1.Text = "start" G5g*-2Fp  
        ' yaSUxT2[?  
        'Button2 g/_wzPh  
        ' K3@Y01||V  
        Me.Button2.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) d$ <O(l  
        Me.Button2.Location = New System.Drawing.Point(304, 540) 7\uB_>`C  
        Me.Button2.Name = "Button2" `jR43+p[{  
        Me.Button2.Size = New System.Drawing.Size(56, 24) {qo 'o5  
        Me.Button2.TabIndex = 1 )BZLat[{  
        Me.Button2.Text = "stop" RQUH e>yF  
        ' | ($/$ G~  
        'Button3 KTp-  
        ' ~|V3BH,9  
        Me.Button3.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) (5"*0"t4a  
        Me.Button3.Location = New System.Drawing.Point(380, 540) Tn9ul1/  
        Me.Button3.Name = "Button3" }FNu0@ G  
        Me.Button3.Size = New System.Drawing.Size(56, 24) +%XRk:I?`9  
        Me.Button3.TabIndex = 1 =6:](`  
        Me.Button3.Text = "cap" j-
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        ' t^~Xr"`vZ  
        'Button4 fr,t
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        ' : )q|Z7  
        Me.Button4.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) TfJ#3N  
        Me.Button4.Location = New System.Drawing.Point(352, 508) J6/^R.V  
        Me.Button4.Name = "Button4" J #d9S}Hxz  
        Me.Button4.Size = New System.Drawing.Size(124, 24) *Dwv+c(z  
        Me.Button4.TabIndex = 1 $,m%?0'  
        Me.Button4.Text = "色彩校正" Gso,sCa7c  
        ' brE|#gR9  
        'Button5 A6s>/u%f>  
        '  !shkL{I  
        Me.Button5.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) gbvoz>fhn  
        Me.Button5.Location = New System.Drawing.Point(164, 512) a1G?3b4OC  
        Me.Button5.Name = "Button5" kb)H6O=PV  
        Me.Button5.Size = New System.Drawing.Size(124, 24) 5 l@S+;dF  
        Me.Button5.TabIndex = 1 w~P|V~2  
        Me.Button5.Text = "画面大小" 2w7$g40SY  
        ' b!cQM||)|  
        'Form1 lN2.:0P0  
        ' '_3KD  
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14) H SY@Hwn  
        Me.ClientSize = New System.Drawing.Size(792, 573) uC@6R.  
        Me.Controls.Add(Me.Button1) u?wKc8t:`\  
        Me.Controls.Add(Me.picView) )=|`}8  
        Me.Controls.Add(Me.Button2) l';~ QS  
        Me.Controls.Add(Me.Button3) :KB(D*  
        Me.Controls.Add(Me.Button4) jm; kb  
        Me.Controls.Add(Me.Button5) O BPw2zD  
        Me.Name = "Form1" y>g0 zn  
        Me.Text = "Form1" y75A.;[.  
        Me.ResumeLayout(False) 0f#^L o/_  
{Au{d5/9F  
    End Sub d @N|,f|  
CB#sh [p  
#End Region rHR(~  
w4}#P+0d  
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load E zO?3E  
        cccap = New Cam(picView.Handle, 0, 0, picView.Width, picView.Height) `:[ ~b  
    End Sub ^4vd, x:  
`Be~8b1/  
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click S\(o(, 3  
        cccap.Start() )eTl uG  
    End Sub 1+eJ9kM  
v- "0`5Gn>  
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click R3IKZIXq  
        cccap.Stop() `bwK=''\d  
    End Sub h
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1a H86d%6  
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click tZ^n y4  
        cccap.GrabImage("c:\test.bmp") A,J06?  
    End Sub I"4<M#q~-  
U#(T,
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    Private Sub Form1_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed 'N5_]$:7n  
        cccap = Nothing rR-4(_-  
    End Sub \-`zy'p  
'mh6C2P~u  
    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click \ZNt>#X  
        cccap.capDlgVideoSource() k9818_z,  
    End Sub , uu cu9  
;JR1'yBu  
    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click !^A2a>  
        cccap.capDlgVideoFormat() W'N(!W  
    End Sub L149uCp?  
End Class =Ig8 L:]mN