以下代碼可以把你機(jī)器上已安裝的硬件設(shè)備全部列出來。

#include <stdio.h>
#include <windows.h>
#include <setupapi.h>
#include <devguid.h>
#include <regstr.h>
#pragma comment(lib, "Setupapi.lib")

int main( int argc, char *argv[ ], char *envp[ ] )
{
??? HDEVINFO hDevInfo;
??? SP_DEVINFO_DATA DeviceInfoData;
??? DWORD i;

??? // Create a HDEVINFO with all present devices.
??? hDevInfo = SetupDiGetClassDevs(NULL,
??????? 0, // Enumerator
??????? 0,
??????? DIGCF_PRESENT | DIGCF_ALLCLASSES );
???
??? if (hDevInfo == INVALID_HANDLE_VALUE)
??? {
??????? // Insert error handling here.
??????? return 1;
??? }
???
??? // Enumerate through all devices in Set.
???
??? DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
??? for (i=0;SetupDiEnumDeviceInfo(hDevInfo,i,
??????? &DeviceInfoData);i++)
??? {
??????? DWORD DataT;
??????? LPTSTR buffer = NULL;
??????? DWORD buffersize = 0;
???????
??????? //
??????? // Call function with null to begin with,
??????? // then use the returned buffer size
??????? // to Alloc the buffer. Keep calling until
??????? // success or an unknown failure.
??????? //
??????? while (!SetupDiGetDeviceRegistryProperty(
??????????? hDevInfo,
??????????? &DeviceInfoData,
??????????? SPDRP_DEVICEDESC,
??????????? &DataT,
??????????? (PBYTE)buffer,
??????????? buffersize,
??????????? &buffersize))
??????? {
??????????? if (GetLastError() ==
??????????????? ERROR_INSUFFICIENT_BUFFER)
??????????? {
??????????????? // Change the buffer size.
??????????????? if (buffer)
?????LocalFree(buffer);
??????????????? buffer = (char *)LocalAlloc(LPTR,buffersize);
??????????? }
??????????? else
??????????? {
??????????????? // Insert error handling here.
??????????????? break;
??????????? }
??????? }
???????
??????? printf("Result:[%s]\n",buffer);
???????
??????? if (buffer) LocalFree(buffer);
??? }
???
???
??? if ( GetLastError()!=NO_ERROR &&
???????? GetLastError()!=ERROR_NO_MORE_ITEMS )
??? {
??????? // Insert error handling here.
??????? return 1;
??? }
???
??? //? Cleanup
??? SetupDiDestroyDeviceInfoList(hDevInfo);
???
??? return 0;
}

?

轉(zhuǎn)載于:https://www.cnblogs.com/suiyingjie/archive/2007/08/24/868519.html

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