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你的网络流没有实例化，在As 后面加个new 就行了

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Dim networkStream as new Network…………

求一个能实现屏幕水波纹效果的vb代码

'补模块3文件。一个放不下。

'

' 渲染子程序，将新的帧数据渲染到 lpDIBitsRender 中

' 算法：

' posx = Wave1(x-1,y)-Wave1(x+1,y)+x

' posy = Wave1(x,y-1)-Wave1(x,y+1)+y

' SourceBmp(x,y) = DestBmp(posx,posy)

'

Public Sub WaveRender(lpWaveObject As WAVE_OBJECT)

Dim dwPosX As Long, dwPosY As Long, dwPtrSource As Long, dwPtrDest As Long, dwFlag As Long

Dim lpWave1 As Long, LineIdx As Long, LinePtr As Long

Dim lpDIBitsSource As Long, lpDIBitsRender As Long

Dim I As Long, J As Long

dwFlag = 0

With lpWaveObject

'Debug.Print "WaveRender " .dwFlag

If (.dwFlag And F_WO_ACTIVE) = 0 Then Exit Sub

.dwFlag = .dwFlag Or F_WO_NEED_UPDATE

lpWave1 = .lpWave1

LineIdx = .dwWaveByteWidth '像素指针

For I = 1 To .dwBmpHeight - 2

For J = 0 To .dwBmpWidth - 1

'********************************************************************

' PosY=i+像素上1能量-像素下1能量

' PosX=j+像素左1能量-像素右1能量

'********************************************************************

'LineIdx = LineIdx - .dwWaveByteWidth

LinePtr = lpWave1 + LineIdx - .dwWaveByteWidth

pLongPtr(0) = LinePtr

dwPosY = pLong(0)

LinePtr = lpWave1 + LineIdx + .dwWaveByteWidth

pLongPtr(0) = LinePtr

dwPosY = dwPosY - pLong(0) + I

LinePtr = lpWave1 + LineIdx - 4

pLongPtr(0) = LinePtr

dwPosX = pLong(0)

LinePtr = lpWave1 + LineIdx + 4

pLongPtr(0) = LinePtr

dwPosX = dwPosX - pLong(0) + J

If dwPosX 0 Or dwPosY 0 Then GoTo Continue

If dwPosX = .dwBmpWidth Or dwPosY = .dwBmpHeight Then GoTo Continue

'********************************************************************

' ptrSource = dwPosY * dwDIByteWidth + dwPosX * 3

' ptrDest = i * dwDIByteWidth + j * 3

'********************************************************************

'dwPtrSource = dwPosY * .dwDIByteWidth + (dwPosX + dwPosX * 2)

dwPosX = dwPosX + dwPosX * 2 'dwPosX * 3

dwPtrSource = dwPosY * .dwDIByteWidth + dwPosX

dwPtrDest = I * .dwDIByteWidth + (J + J * 2) 'dwPtrDest = I * .dwDIByteWidth + J * 3

'********************************************************************

' 渲染像素 [ptrDest] = 原始像素 [ptrSource]

'********************************************************************

lpDIBitsSource = .lpDIBitsSource + dwPtrSource

lpDIBitsRender = .lpDIBitsRender + dwPtrDest

If dwPtrSource dwPtrDest Then

dwFlag = dwFlag Or 1 '如果存在源像素和目标像素不同，则表示还在活动状态

' Debug.Print dwPtrSource " SR " dwPtrDest

'CopyMemory ByVal lpDIBitsRender, ByVal lpDIBitsSource, 3

Call WaveGetPixel(lpDIBitsSource, lpDIBitsRender, .dwDIByteWidth)

Else

CopyMemory ByVal lpDIBitsRender, ByVal lpDIBitsSource, 3

End If

'********************************************************************

' 继续循环

'********************************************************************

Continue:

LineIdx = LineIdx + 4 '像素++ '指针4个字节

Next 'J

Next 'I

SetDIBits .hDcRender, .hBmpRender, 0, .dwBmpHeight, .lpDIBitsRender, .stBmpInfo, DIB_RGB_COLORS

If dwFlag = 0 Then .dwFlag = .dwFlag And (Not F_WO_ACTIVE)

'Debug.Print "WaveRender " .dwFlag

End With

End Sub

Public Sub WaveUpdateFrame(lpWaveObject As WAVE_OBJECT, ByVal hdc As Long, bIfForce As Boolean)

'Dim ret As Long

With lpWaveObject

If bIfForce = True Then GoTo labUpdate

If (.dwFlag And F_WO_NEED_UPDATE) Then

'ret = SetDIBitsToDevice(.hDcRender, 0, 0, .dwBmpWidth, .dwBmpHeight, 0, 0, 0, .dwBmpHeight, .lpDIBitsRender, .stBmpInfo, DIB_RGB_COLORS)

'ret = SetDIBits(.hDcRender, .hBmpRender, 0, .dwBmpHeight, .lpDIBitsRender, .stBmpInfo, DIB_RGB_COLORS)

'SetDIBits .hDcRender, .hBmpRender, 0, .dwBmpHeight, .lpDIBitsRender, .stBmpInfo, DIB_RGB_COLORS

labUpdate:

BitBlt hdc, 0, 0, .dwBmpWidth, .dwBmpHeight, .hDcRender, 0, 0, SRCCOPY

.dwFlag = .dwFlag And (Not F_WO_NEED_UPDATE)

End If

End With

End Sub

'

' 扔一块石头

'

Public Sub WaveDropStone(lpWaveObject As WAVE_OBJECT, ByVal dwPosX As Long, ByVal dwPosY As Long, ByVal dwStoneSize As Long, ByVal dwStoneWeight As Long)

Dim dwSize As Long

Dim dwX1 As Long, dwX2 As Long

Dim dwY1 As Long, dwY2 As Long, dwY3 As Long

'Dim dwMaxX As Long, dwMaxY As Long

Dim LinePtr As Long

With lpWaveObject

'Debug.Print "WaveDropStone " .dwFlag

'********************************************************************

' 计算范围

'********************************************************************

dwSize = dwStoneSize \ H2 '2 ^ 1

dwX1 = dwPosX + dwSize

dwX2 = dwPosX - dwSize

If (.dwFlag And F_WO_ELLIPSE) Then dwSize = dwSize \ H2 ' 2 ^ 1

dwY1 = dwPosY + dwSize

dwY2 = dwPosY - dwSize

dwSize = dwStoneSize

If dwSize = 0 Then dwSize = dwSize + 1

'********************************************************************

' 判断范围的合法性

'********************************************************************

If dwX1 + 1 = .dwBmpWidth Or dwX2 1 Or dwY1 + 1 = .dwBmpHeight Or dwY2 1 Then Exit Sub

'********************************************************************

' 将范围内的点的能量置为 dwStoneWeight

'********************************************************************

While dwX2 = dwX1

dwY3 = dwY2

While dwY3 = dwY1

'(x-x0)^2+(y-y0)^2=r^2 就在圆内

If (dwX2 - dwPosX) * (dwX2 - dwPosX) + (dwY3 - dwPosY) * (dwY3 - dwPosY) = dwSize * dwSize Then

LinePtr = .lpWave1 + (dwY3 * .dwBmpWidth + dwX2) * H4 '2 ^ 2

pLongPtr(0) = LinePtr

pLong(0) = dwStoneWeight

End If

dwY3 = dwY3 + 1

Wend

dwX2 = dwX2 + 1

Wend

.dwFlag = .dwFlag Or F_WO_ACTIVE

End With

End Sub

'

' 计算扩散数据、渲染位图、更新窗口、处理特效的定时器过程

'

Public Sub WaveTimerProc(ByVal hWnd As Long, ByVal uMsg As Long, ByVal idEvent As Long, ByVal dwTime As Long)

Dim hdc As Long

Dim dwPosX As Long, dwPosY As Long, dwSize As Long, dwWeight As Long

Dim lpWaveObj As Long

'建立模拟指针

Dim pWAVE_OBJECT() As WAVE_OBJECT

Dim pWAVE_OBJECTPtr() As Long

Dim SApWAVE_OBJECT As SAFEARRAY1D

Dim SApWAVE_OBJECTPtr As SAFEARRAY1D

With SApWAVE_OBJECT

.cDims = 1

.fFeatures = 0

.cbElements = 1

.cLocks = 0

.pvData = 0

.Bounds(0).lLbound = 0

.Bounds(0).cElements = 1

End With

With SApWAVE_OBJECTPtr

.cDims = 1

.fFeatures = 0

.cbElements = 4

.cLocks = 0

.pvData = VarPtr(SApWAVE_OBJECT.pvData)

.Bounds(0).lLbound = 0

.Bounds(0).cElements = 1

End With

CopyMemory ByVal VarPtrArray(pWAVE_OBJECT), VarPtr(SApWAVE_OBJECT), 4

CopyMemory ByVal VarPtrArray(pWAVE_OBJECTPtr), VarPtr(SApWAVE_OBJECTPtr), 4

lpWaveObj = idEvent

pWAVE_OBJECTPtr(0) = lpWaveObj

'Debug.Print "WaveTimerProc " pWAVE_OBJECT(0).dwFlag

Call WaveSpread(pWAVE_OBJECT(0))

Call WaveRender(pWAVE_OBJECT(0))

With pWAVE_OBJECT(0)

If (.dwFlag And F_WO_NEED_UPDATE) Then

hdc = GetDC(.hWnd)

Call WaveUpdateFrame(pWAVE_OBJECT(0), hdc, False)

Call ReleaseDC(.hWnd, hdc)

End If

'********************************************************************

' 特效处理

'********************************************************************

If (.dwFlag And F_WO_EFFECT) = 0 Then Exit Sub

Select Case .dwEffectType

'********************************************************************

' Type = 1 雨点，Param1＝速度（0最快，越大越慢），Param2＝雨点大小，Param3＝能量

'********************************************************************

Case 1

'Dim ret As Long

If .dwEffectParam1 0 Then Call WaveRandom(pWAVE_OBJECT(0), .dwEffectParam1) 'ret = WaveRandom(pWAVE_OBJECT(0), .dwEffectParam1)

'If ret = 0 Then

dwPosX = WaveRandom(pWAVE_OBJECT(0), .dwBmpWidth - 2) + 1

dwPosY = WaveRandom(pWAVE_OBJECT(0), .dwBmpHeight - 2) + 1

dwSize = WaveRandom(pWAVE_OBJECT(0), .dwEffectParam2) + 1

dwWeight = WaveRandom(pWAVE_OBJECT(0), .dwEffectParam3) + 50

Call WaveDropStone(pWAVE_OBJECT(0), dwPosX, dwPosY, dwSize, dwWeight)

'End If

'********************************************************************

' Type = 2 行船，Param1＝速度（0最快，越大越快），Param2＝大小，Param3＝能量

'********************************************************************

Case 2

.dwEff2Flip = .dwEff2Flip + 1

If (.dwEff2Flip And 1) 0 Then Exit Sub

dwPosX = .dwEff2X + .dwEff2XAdd

dwPosY = .dwEff2Y + .dwEff2YAdd

If dwPosX 1 Then

dwPosX = -(dwPosX - 1)

.dwEff2XAdd = -.dwEff2XAdd

End If

If dwPosY 1 Then

dwPosY = -(dwPosY - 1)

.dwEff2YAdd = -.dwEff2YAdd

End If

If dwPosX .dwBmpWidth - 1 Then

dwPosX = (.dwBmpWidth - 1) - (dwPosX - (.dwBmpWidth - 1)) '(.dwBmpWidth - 1)*2 -dwPosX

.dwEff2XAdd = -.dwEff2XAdd

End If

If dwPosY .dwBmpHeight - 1 Then

dwPosY = (.dwBmpHeight - 1) - (dwPosY - (.dwBmpHeight - 1)) '(.dwBmpHeight-1)*2-dwPosY

.dwEff2YAdd = -.dwEff2YAdd

End If

.dwEff2X = dwPosX

.dwEff2Y = dwPosY

Call WaveDropStone(pWAVE_OBJECT(0), dwPosX, dwPosY, .dwEffectParam2, .dwEffectParam3)

'********************************************************************

' Type = 3 波浪，Param1＝密度，Param2＝大小，Param3＝能量

'********************************************************************

Case 3

Dim I As Long

For I = 0 To .dwEffectParam1

dwPosX = WaveRandom(pWAVE_OBJECT(0), .dwBmpWidth - 2) + 1

dwPosY = WaveRandom(pWAVE_OBJECT(0), .dwBmpHeight - 2) + 1

dwSize = WaveRandom(pWAVE_OBJECT(0), .dwEffectParam2) + 1

dwWeight = WaveRandom(pWAVE_OBJECT(0), .dwEffectParam3)

Call WaveDropStone(pWAVE_OBJECT(0), dwPosX, dwPosY, dwSize, dwWeight)

Next

End Select

End With

'取消模拟指针

CopyMemory ByVal VarPtrArray(pWAVE_OBJECT), 0, 4

CopyMemory ByVal VarPtrArray(pWAVE_OBJECTPtr), 0, 4

End Sub

'

'释放对象

'

Public Sub WaveFree(lpWaveObject As WAVE_OBJECT)

With lpWaveObject

If .hDcRender 0 Then DeleteDC (.hDcRender)

If .hBmpRender 0 Then DeleteObject .hBmpRender

If .lpDIBitsSource 0 Then GlobalFree .lpDIBitsSource

If .lpDIBitsRender 0 Then GlobalFree .lpDIBitsRender

If .lpWave1 0 Then GlobalFree .lpWave1

If .lpWave2 0 Then GlobalFree .lpWave2

KillTimer .hWnd, VarPtr(lpWaveObject)

ZeroMemory ByVal VarPtr(lpWaveObject), Len(lpWaveObject)

'-----------------------------------------------------------

'取消模拟指针

CopyMemory ByVal VarPtrArray(pLong), 0, 4

CopyMemory ByVal VarPtrArray(pLongPtr), 0, 4

'-----------------------------------------------------------------

'取消模拟指针

CopyMemory ByVal VarPtrArray(pByte), 0, 4

CopyMemory ByVal VarPtrArray(pBytePtr), 0, 4

'-----------------------------------------------------------

End With

End Sub

'

' 初始化对象

' 参数：_lpWaveObject ＝ 指向 WAVE_OBJECT结构体

' 返回：0 成功、 1 失败

'

Public Function WaveInit(lpWaveObject As WAVE_OBJECT, ByVal hWnd As Long, ByVal hBmp As Long, ByVal dwSpeed As Long, ByVal dwType As WaveType) As Long

Dim stBmp As BITMAP

Dim dwReturn As Long

Dim ret As Long

Dim hdc As Long

Dim hMDC As Long

'-----------------------------------------------------------------

'建立模拟指针

With SApLong

.cDims = 1

.fFeatures = 0

.cbElements = 1

.cLocks = 0

.pvData = 0

.Bounds(0).lLbound = 0

.Bounds(0).cElements = 1

End With

With SApLongPtr

.cDims = 1

.fFeatures = 0

.cbElements = 4

.cLocks = 0

.pvData = VarPtr(SApLong.pvData)

.Bounds(0).lLbound = 0

.Bounds(0).cElements = 1

End With

CopyMemory ByVal VarPtrArray(pLong), VarPtr(SApLong), 4

CopyMemory ByVal VarPtrArray(pLongPtr), VarPtr(SApLongPtr), 4

'-----------------------------------------------------------------

'建立模拟指针

With SApByte

.cDims = 1

.fFeatures = 0

.cbElements = 1

.cLocks = 0

.pvData = 0

.Bounds(0).lLbound = 0

.Bounds(0).cElements = 3

End With

With SApBytePtr

.cDims = 1

.fFeatures = 0

.cbElements = 4

.cLocks = 0

.pvData = VarPtr(SApByte.pvData)

.Bounds(0).lLbound = 0

.Bounds(0).cElements = 1

End With

CopyMemory ByVal VarPtrArray(pByte), VarPtr(SApByte), 4

CopyMemory ByVal VarPtrArray(pBytePtr), VarPtr(SApBytePtr), 4

'-----------------------------------------------------------------

dwReturn = 0

ZeroMemory ByVal VarPtr(lpWaveObject), Len(lpWaveObject)

'ZeroMemory lpWaveObject, H84 ' Len(WAVE_OBJECT)

With lpWaveObject

If dwType = sEllipse Then

.dwFlag = .dwFlag Or F_WO_ELLIPSE

End If

'********************************************************************

' 获取位图尺寸

'********************************************************************

.hWnd = hWnd

.dwRandom = GetTickCount()

ret = GetObject(hBmp, Len(stBmp), stBmp)

If ret = 0 Then

dwReturn = 1

GoTo result

End If

.dwBmpHeight = stBmp.bmHeight

'if lpWaveObject.dwBmpHeight 3 then dwReturn = 1:GoTo result

.dwBmpWidth = stBmp.bmWidth

'if lpWaveObject.dwBmpWidth 3 then dwReturn = 1:GoTo result

.dwWaveByteWidth = stBmp.bmWidth * H4 '2 ^ 2 'dwBmpWidth * 4

.dwDIByteWidth = (stBmp.bmWidth + stBmp.bmWidth * 2 + 3) And (Not H3) '(dwBmpWidth * 3 + 3) and ~3 ' ((W * 3 + 3) And (Not 3))

'********************************************************************

' 创建用于渲染的位图

'********************************************************************

hdc = GetDC(hWnd)

.hDcRender = CreateCompatibleDC(hdc)

.hBmpRender = CreateCompatibleBitmap(hdc, .dwBmpWidth, .dwBmpHeight)

'MsgBox .hBmpRender

SelectObject .hDcRender, .hBmpRender

'********************************************************************

' 分配波能缓冲区

'********************************************************************

.lpWave1 = GlobalAlloc(GPTR, .dwWaveByteWidth * .dwBmpHeight)

.lpWave2 = GlobalAlloc(GPTR, .dwWaveByteWidth * .dwBmpHeight)

'********************************************************************

' 分配像素缓冲区

'********************************************************************

.lpDIBitsSource = GlobalAlloc(GPTR, .dwDIByteWidth * .dwBmpHeight)

.lpDIBitsRender = GlobalAlloc(GPTR, .dwDIByteWidth * .dwBmpHeight)

'********************************************************************

' 获取原始像素数据

'********************************************************************

'With .stBmpInfo.bmiHeader

.stBmpInfo.bmiHeader.biSize = Len(.stBmpInfo.bmiHeader) ' H28 'len(BITMAPINFOHEADER)

.stBmpInfo.bmiHeader.biWidth = .dwBmpWidth

.stBmpInfo.bmiHeader.biHeight = -.dwBmpHeight '- .dwBmpHeight

.stBmpInfo.bmiHeader.biPlanes = 1

.stBmpInfo.bmiHeader.biBitCount = 24

.stBmpInfo.bmiHeader.biCompression = BI_RGB

.stBmpInfo.bmiHeader.biSizeImage = 0

'End With

hMDC = CreateCompatibleDC(hdc)

SelectObject hMDC, hBmp

ReleaseDC hWnd, hdc

GetDIBits hMDC, hBmp, 0, .dwBmpHeight, .lpDIBitsSource, .stBmpInfo, DIB_RGB_COLORS

GetDIBits hMDC, hBmp, 0, .dwBmpHeight, .lpDIBitsRender, .stBmpInfo, DIB_RGB_COLORS

DeleteDC hMDC

If .lpWave1 = 0 Or .lpWave2 = 0 Or .lpDIBitsSource = 0 Or .lpDIBitsRender = 0 Or .hDcRender = 0 Then

WaveFree lpWaveObject

dwReturn = 1

End If

'Debug.Print "WaveInit " .dwFlag

SetTimer hWnd, ByVal VarPtr(lpWaveObject), dwSpeed, AddressOf WaveTimerProc

.dwFlag = .dwFlag Or F_WO_ACTIVE Or F_WO_NEED_UPDATE

'Debug.Print "WaveInit " .dwFlag

WaveRender lpWaveObject

hdc = GetDC(.hWnd)

WaveUpdateFrame lpWaveObject, hdc, True

ReleaseDC .hWnd, hdc

End With

'********************************************************************

result:

WaveInit = dwReturn

End Function

'

' 一些特效

' 输入：dwType = 0 关闭特效

' dwType 0 开启特效，参数具体见上面

'

Public Sub WaveEffect(lpWaveObject As WAVE_OBJECT, ByVal dwEffectType As WaveEffectType, ByVal dwParam1 As Long, ByVal dwParam2 As Long, ByVal dwParam3 As Long)

Dim dwMaxX As Long, dwMaxY As Long

With lpWaveObject

' Debug.Print "WaveEffect " .dwFlag

Select Case dwEffectType

Case wClose '关闭特效

.dwFlag = .dwFlag And (Not F_WO_EFFECT)

.dwEffectType = dwEffectType

Exit Sub

'Case wrain '下雨

Case wLaunch '汽艇

.dwEff2XAdd = dwParam1

.dwEff2YAdd = dwParam1

.dwEff2X = WaveRandom(lpWaveObject, .dwBmpWidth - 2) + 1

.dwEff2Y = WaveRandom(lpWaveObject, .dwBmpHeight - 2) + 1

' .dwEffectType = dwEffectType

' .dwEffectParam1 = dwParam1

' .dwEffectParam2 = dwParam2

' .dwEffectParam3 = dwParam3

' .dwFlag = .dwFlag Or F_WO_EFFECT

'Case wWaves '风浪

'Case Else '默认

End Select

.dwEffectType = dwEffectType

.dwEffectParam1 = dwParam1

.dwEffectParam2 = dwParam2

.dwEffectParam3 = dwParam3

.dwFlag = .dwFlag Or F_WO_EFFECT

End With

End Sub

完

vb.net无边框窗口如何做出阴影效果？

调用系统API使窗体下拥有阴影效果

using System.Runtime.InteropServices;

然后再窗口类的随便哪个地方加上：

const int CS_DROPSHADOW = 0x20000;

const int GCL_STYLE = (-26);

//声明Win32 API

[DllImport("user32.dll", CharSet = CharSet.Auto)]

public static extern int SetClassLong(IntPtr hwnd,int nIndex,int dwNewLong);

[DllImport("user32.dll", CharSet = CharSet.Auto)]

public static extern int GetClassLong(IntPtr hwnd, int nIndex);

最后在窗体的构造函数中加上：

SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DROPSHADOW);

VB.NET窗体阴影

vb.net2008

vb.net API 是将除特殊变量（如H20000）的Long都改成Integer

窗体的右侧和下方有阴影

Public Class Form1

Private Const CS_DROPSHADOW = H20000

Private Const GCL_STYLE = (-26)

Private Declare Function GetClassLong Lib "user32" Alias "GetClassLongA" (ByVal hwnd As Integer, ByVal nIndex As Integer) As Integer

Private Declare Function SetClassLong Lib "user32" Alias "SetClassLongA" (ByVal hwnd As Integer, ByVal nIndex As Integer, ByVal dwNewLong As Long) As Integer

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

SetClassLong(Me.Handle, GCL_STYLE, GetClassLong(Me.Handle, GCL_STYLE) Or CS_DROPSHADOW)

End Sub

End Class

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