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<html><head><title>Library SimpleDNSResolver</title></head>
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<a name="topofdoc">Library SimpleDNSResolver</a></h1>
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<p><strong>[
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<a href="#data">Data</a> |
<a href="#functions">Functions</a>
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<h2>Quick Index</h2>
<dl>
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<p><br><p><a name="classes"><hr><p></p></a><h2>Classes</h2>
<dl><dl>
<dt><a href="CSimpleDNSClient.html">CSimpleDNSClient</a>
<dd>
COM (ActiveX) object implementing ISimpleDNSClient, a DNS resolver.
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<a name="data"><hr><p></p></a><h2>Data</h2>
<dl>
<dd><a href="#"></a>
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<a name="functions"><hr><p></p></a><h2>Global Functions</h2>
<dl>
<dd>LPTSTR <a href="#LPTSTR_WindowsGetErrorText(DWORD_dwErrorCode,_LPTSTR_lpszBuf,_DWORD_dwSize)$"><font color=green>WindowsGetErrorText</font></a>(DWORD dwErrorCode, LPTSTR lpszBuf, DWORD dwSize);
<dd>DWORD <a href="#DWORD_WindowsSocketGetErrorText(DWORD_dwErrorCode,_LPTSTR_*lplpszTemp)$"><font color=green>WindowsSocketGetErrorText</font></a>(DWORD dwErrorCode, LPTSTR *lplpszTemp);
</dl>
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<a name=""><hr><p></p><h3></h3></a>
<strong>#include "<a href="SimpleDNSClient.h">SimpleDNSClient.h</a>"</strong><p>
<a href="CSimpleDNSClient.html">CSimpleDNSClient</a>
<p><pre>
/* -----------------------------------------------------------------
</pre>
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<a name="LPTSTR_WindowsGetErrorText(DWORD_dwErrorCode,_LPTSTR_lpszBuf,_DWORD_dwSize)$"><hr><p></p><h3>LPTSTR WindowsGetErrorText(DWORD dwErrorCode, LPTSTR lpszBuf, DWORD dwSize);</h3></a>
<strong>#include "<a href="WindowsErrorText.h">WindowsErrorText.h</a>"</strong><p>
<p>
<U>Purpose:</U> return the text for a given Windows Error Code
<p>
<U>Parameters:</U>
<p>
<dl><dl>
<dt><i>in</i><strong> dwErrorCode</strong>
<dd> WIN32 error code (e.g. returned by "GetLastError")
<dt><i>in</i><strong> lpszBuf</strong>
<dd> buffer where the error text will be written
<dt><i>in</i><strong> dwSize</strong>
<dd> size of the buffer (maximum size for the error text)
<p>
</dl></dl>
<U>Return value :</U> LPTSTR = error text (points to lpszBuf)
<p>
<U>Description :</U> This function is a wrapper for many error-handling
functions from WIN32. It searches for error text
in the following locations:
<p>
<UL>
<LI>In the Operating System, using function FormatMessage (...FORMAT_MESSAGE_FROM_SYSTEM...)
<LI>In an hard-coded table for Windows Socket (Winsock) error code (see function <a href="#DWORD_WindowsSocketGetErrorText(DWORD_dwErrorCode,_LPTSTR_*lplpszTemp)$">WindowsSocketGetErrorText</a>())
<LI>In specific modules, using function FormatMessage (...FORMAT_MESSAGE_FROM_HMODULE...):
<UL>
<LI>wininet.dll (Win32 Internet Errors)
<LI>mqutil.dll (Microsoft Message Queue Errors)
</UL>
<LI>In Extended Internet Errors, using function InternetGetLastResponseInfo()
</UL>
<p>
If no error text is found, this function still builds an error message
with the format "Error Code 0x%X (%d)" (the error code is shown is hexadecimal
and in decimal).
<p>
<p><pre>
LPTSTR <a href="#LPTSTR_WindowsGetErrorText(DWORD_dwErrorCode,_LPTSTR_lpszBuf,_DWORD_dwSize)$">WindowsGetErrorText</a>(DWORD dwErrorCode, LPTSTR lpszBuf, DWORD dwSize);
</pre>
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<a name="DWORD_WindowsSocketGetErrorText(DWORD_dwErrorCode,_LPTSTR_*lplpszTemp)$"><hr><p></p><h3>DWORD WindowsSocketGetErrorText(DWORD dwErrorCode, LPTSTR *lplpszTemp);</h3></a>
<strong>#include "<a href="WindowsErrorText.h">WindowsErrorText.h</a>"</strong><p>
<p>
<U>Purpose:</U> return the clear-text message for a Windows Socket
(winsock) error code.
<p>
<U>Parameters:</U>
<p>
<dl><dl>
<dt><i>in</i><strong> dwErrorCode</strong>
<dd> winsock error code (should be above WSABASEERR = 10000)
<dt><i>out</i><strong> lplpszTemp</strong>
<dd> clear-text error message
<p>
</dl></dl>
<U>Return value :</U> DWORD = length of the error message, or 0
if the error code cannot be mapped
(not a Winsock error code).
<p>
<U>Description :</U> Winsock error codes cannot be correctly mapped
to clear-text messages using WIN32 function
FormatMessage (try it; you'll be surprised).
This function uses an hard-coded table
to map code to their real clear-text messages.
<p>
The calling application must free the string
allocated in variable lplpszTemp
(using WIN32 function LocalFree()).
<p>
<p><pre>
DWORD <a href="#DWORD_WindowsSocketGetErrorText(DWORD_dwErrorCode,_LPTSTR_*lplpszTemp)$">WindowsSocketGetErrorText</a>(DWORD dwErrorCode, LPTSTR *lplpszTemp);
</pre>
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Generated from source by the <i><a href="http://www.stratasys.com/software/cocoon/index.htm">Cocoon</a></i> utilities on Wed Feb 09 17:55:46 2000
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<address>Report <a href="mailto:jkotula@stratasys.com">problems</a> to jkotula@stratasys.com</address>
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