全自動(dòng)安裝卸載驅(qū)動(dòng)程序的源程序
DWORD DataT;
LPTSTR p,buffer = NULL;
DWORD buffersize = 0;
//
// We won't know the size of the HardwareID buffer until we call
// this function. So call it with a null to begin with, and then
// use the required buffer size to Alloc the nessicary space.
// Keep calling we have success or an unknown failure.
//
while (!SetupDiGetDeviceRegistryProperty(
DeviceInfoSet,
&DeviceInfoData,
SPDRP_HARDWAREID,
&DataT,
(PBYTE)buffer,
buffersize,
&buffersize))
{
if (GetLastError() == ERROR_INVALID_DATA)
{
//
// May be a Legacy Device with no HardwareID. Continue.
//
break;
}
else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
{
//
// We need to change the buffer size.
//
if (buffer)
LocalFree(buffer);
buffer = (char *)LocalAlloc(LPTR,buffersize);
}
else
{
//
// Unknown Failure.
//
DisplayError(TEXT(GetDeviceRegistryProperty));
goto cleanup_DeviceInfo;
}
}
if (GetLastError() == ERROR_INVALID_DATA)
continue;
//
// Compare each entry in the buffer multi-sz list with our HardwareID.
//
for (p=buffer;*p&&(p<&buffer[buffersize]);p+=lstrlen(p)+sizeof(TCHAR))
{
//_tprintf(TEXT(Compare device ID: [%s]\\n),p);
if (!_tcscmp(HardwareID,p))
{
//_tprintf(TEXT(Found! [%s]\\n),p);
//
// Worker function to remove device.
//
if (!SetupDiCallClassInstaller(DIF_REMOVE,
DeviceInfoSet,
&DeviceInfoData))
{
DisplayError(TEXT(CallClassInstaller(REMOVE)));
}
break;
}
}
if (buffer) LocalFree(buffer);
}
if ((GetLastError()!=NO_ERROR)&&(GetLastError()!=ERROR_NO_MORE_ITEMS))
{
DisplayError(TEXT(EnumDeviceInfo));
}
//
// Cleanup.
//
cleanup_DeviceInfo:
err = GetLastError();
SetupDiDestroyDeviceInfoList(DeviceInfoSet);
return err;
}
[/scode]
