111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
//
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// This is a part of the Microsoft Source Code Samples.
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// Copyright 1993 - 2002 Microsoft Corporation.
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// All rights reserved.
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// This source code is only intended as a supplement to
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// Microsoft Development Tools and/or WinHelp documentation.
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// See these sources for detailed information regarding the
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// Microsoft samples programs.
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//
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//
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// RasEnumDevices.c
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//
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// Usage:
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// RasEnumDevices
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//
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// RAS API's used:
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// RasEnumDevices
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//
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x500
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#endif
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#include <windows.h>
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#include <stdio.h>
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#include <ras.h>
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#include <raserror.h>
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#include <tchar.h>
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#include <strsafe.h>
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// Macro for counting maximum characters that will fit into a buffer
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#define CELEMS(x) ((sizeof(x))/(sizeof(x[0])))
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int __cdecl main(void)
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{
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DWORD i = 0;
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DWORD dwRet = 0;
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DWORD cb = sizeof(RASDEVINFO);
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DWORD cDevices = 0;
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LPRASDEVINFO lpRasDevInfo;
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LPRASDEVINFO lpTempRasDevInfo;
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BOOL fSuccess = FALSE;
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TCHAR szTempBuf[256] = {0};
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// Allocate buffer with space for at least one structure
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lpRasDevInfo = (LPRASDEVINFO)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, cb);
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if (NULL == lpRasDevInfo)
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{
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printf("HeapAlloc failed.\n");
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return ERROR_OUTOFMEMORY;
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}
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lpRasDevInfo->dwSize = sizeof(RASDEVINFO);
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dwRet = RasEnumDevices(lpRasDevInfo, &cb, &cDevices);
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switch(dwRet) // Check whether RasEnumDevices succeeded
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{
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case ERROR_BUFFER_TOO_SMALL:
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// If the buffer is too small, free the allocated memory and allocate a bigger buffer.
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HeapFree(GetProcessHeap(), 0, (LPVOID)lpRasDevInfo);
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lpRasDevInfo = (LPRASDEVINFO)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, cb);
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if (NULL == lpRasDevInfo)
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{
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printf("HeapAlloc failed.\n");
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return ERROR_OUTOFMEMORY;
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}
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lpRasDevInfo->dwSize = sizeof(RASDEVINFO);
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dwRet = RasEnumDevices(lpRasDevInfo, &cb, &cDevices);
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if (ERROR_SUCCESS == dwRet)
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{
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fSuccess = TRUE;
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}
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else
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{
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printf("RasEnumDevices failed: Error = %d\n", dwRet);
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goto done;
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}
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break;
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case ERROR_SUCCESS:
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fSuccess = TRUE;
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break;
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default:
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printf("RasEnumDevices failed: Error = %d\n", dwRet);
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goto done;
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}
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if (fSuccess)
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{
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printf("The following RAS capable devices were found on this machine:\n\n");
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printf("Device\t\t\tCategory\n\n");
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lpTempRasDevInfo = lpRasDevInfo;
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for (i = 0; i < cDevices; i++)
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{
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ZeroMemory((LPVOID)szTempBuf, sizeof(szTempBuf));
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StringCchPrintf(szTempBuf, CELEMS(szTempBuf), "%s\t%s\n",lpTempRasDevInfo->szDeviceName, lpTempRasDevInfo->szDeviceType);
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printf(szTempBuf);
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lpTempRasDevInfo++;
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}
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}
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done:
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HeapFree(GetProcessHeap(), 0, (LPVOID)lpRasDevInfo);
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return (int)dwRet;
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}
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