如何判断是比笔记本还是台式机？

#include <stdio.h>
#include <windows.h>
#include <setupapi.h>
#include <devguid.h>
#include <regstr.h>
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.

TCHAR buffer[4096]={0};
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (i=0;SetupDiEnumDeviceInfo(hDevInfo,i,
&DeviceInfoData);i++)
{
DWORD DataT;
DWORD buffersize = 4096;

//
// 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.
//
SetupDiGetDeviceRegistryProperty(
hDevInfo,
&DeviceInfoData,
SPDRP_HARDWAREID,
&DataT,
(PBYTE)buffer,
buffersize,
&buffersize);

if( wcscmp(buffer, L"ACPI//PNP0000")==0 )
{

SetupDiDestroyDeviceInfoList(hDevInfo);
printf("It is a laptop/n");
return 1;
}
}

if ( GetLastError()!=NO_ERROR &&
GetLastError()!=ERROR_NO_MORE_ITEMS )
{
// Insert error handling here.
return -1;
}

//  Cleanup
SetupDiDestroyDeviceInfoList(hDevInfo);
return 0;
}