VB中检测是否连网

0b8P5Y pJ0利用WIN95中的注册表建植，在注册表的HKEY-LOCAL-MACHINE\System\CurrentControlSet\Services\RemoteAcces\下，当计算机连上因特网时，Remote Connection的植为01 00 00 00，反之，为00 00 00 00，通过这一建植可判断是否连网。

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1.建立新模块睿鑫网络9Q,K]KlR@m \[

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public const ERROR-SUCCESS= 0&睿鑫网络9nZ3N&V5X2KY*k

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public const APINULL= 0&睿鑫网络'z;Ip jO

,Vnb7cS8B0public const HKEY-LOCAL-MACHINE= &H80000002

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5QU~:W @q7EtB:O0public ReturnCode as long

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BK0声明API函数

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RegCloseKey()

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g1q+e%T^,~0k%^0RegQueryValueEx()睿鑫网络'[B|0nL8[D$z+X

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自定义函数

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public function ActiveConnection() as boolean睿鑫网络Znj!O;uA7_ E

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dim hKey as long

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dim lpSubKey as string睿鑫网络;t~{{^`|K(K2U,N

@jj.j F0dim lpReserved as long

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8gb,_%`5n[^y4S0dim lpType as long睿鑫网络1rxd-ClPU&V

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dim lpData as long

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dim lpcbData as long

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ActiveConnection=False

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s| t/n i,h0lpSubKey="System\CurrentControlSet\Services\RemoteAccess"

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w.s aMgr#U%b0ReturnCode=RegOpenKey(HKEY-LOCAL-MACHINE,lpSubKey,phkResult)睿鑫网络sARCe$?1X

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if ReturnCode=ERROR-SUCCESS then睿鑫网络*SpL2a/_:dw)MOs;k

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vF,G+r4Re1v0lpValueName="Remote Connection"睿鑫网络~
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lpReserved=APINULL睿鑫网络y!b4V:wPIm

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lpType=APINULL睿鑫网络0p Qmqs:LqB1_

w}&n@?/v0lpData=APINULL睿鑫网络@k4W:R5I"YR"O

3nR)v od$d0lpcbData=APINULL睿鑫网络'V1J#Q3Ur+l%iA

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ReturnCode=RegQueryValueEx(hKey,lpValueName,lpReserved,lpType,ByVal lpData,lpcba

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\UjQ4V4}0lpcbData=Len(lpData)

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A~ayo |~*d0ReturnCode=RegQueryValueEx(hKey,lpValueName,lpReserved,lpType,ByVal lpData,lpcba

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t%CS0if ReturnCode=ERROR-SUCCESS then睿鑫网络].H&W
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*p`:m$lp3i0if lpData=0 then睿鑫网络+\WV [T"N

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ActiveConnection=false睿鑫网络)]a ? id

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else

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GDwf7A%B0Z8B0end if

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7]1s\`V"h0end if

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RegCloseKey(hKey)

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end funtion睿鑫网络cb3^K1oD v |z5wE

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priate sub Command1-click()睿鑫网络COq*M6SU*P:?k

7u%?%Y LPnd0if ActiveConnection=True then

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msgbox "OK!"睿鑫网络rD/i`)R)h

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else睿鑫网络$aK+p/\V

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msgbox "ERROR!"睿鑫网络%TAB6BZ9v.t

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end sub

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