blocks|key|2987161|text|您可以使用CM_Request_Device_Eject()函数以及其他一些方法。请参考以下项目和文章：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987162|DevEject:简单明了。http://www.withopf.com/tools/deveject/|offset|length|2987163|一篇有用的CodeProject文章：http://www.codeproject.com/KB/system/RemoveDriveByLetter.aspx|2987164|entityMap|0|LINK|mutability|MUTABLE|url|http://www.withopf.com/tools/deveject/|1|http://www.codeproject.com/KB/system/RemoveDriveByLetter.aspx^0|0|E|12|0|0|J|1P|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]|P|$5|K|L|M|A|$N|Q]]]]

You can use the CM_Request_Device_Eject() function as well as some other possibilities.
Consult the following projects and articles:

DevEject: Straightforward.
<a href="http://www.withopf.com/tools/deveject/" rel="noreferrer">http://www.withopf.com/tools/deveject/</a>

A useful CodeProject article:
<a href="http://www.codeproject.com/KB/system/RemoveDriveByLetter.aspx" rel="noreferrer">http://www.codeproject.com/KB/system/RemoveDriveByLetter.aspx</a>

blocks|key|3831373|text|看起来像是Sync可以让你指定-e来弹出可移动驱动器。虽然不是makefile应用程序接口，但您可能只需从win32调用sync+-e+[drive_letter]即可。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3831374|entityMap|0|LINK|mutability|MUTABLE|url|http://technet.microsoft.com/en-us/sysinternals/bb897438.aspx^0|1O|M|5|4|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

It looks like <a href="http://technet.microsoft.com/en-us/sysinternals/bb897438.aspx" rel="noreferrer">Sync</a> lets you specify -e to eject removable drives. While not a win32 API, you could probably just call <code>sync -e [drive_letter]</code> from your makefile.

blocks|key|746505|text|这是一个关于可移动存储介质的technet+article。查找DismountNtmsMedia。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|746506|entityMap|0|LINK|mutability|MUTABLE|url|http://technet.microsoft.com/en-us/library/cc757632.aspx^0|W|H|E|F|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

Here is a <a href="http://technet.microsoft.com/en-us/library/cc757632.aspx" rel="nofollow noreferrer">technet article</a> about removable storage media. Look for <code>DismountNtmsMedia</code>.

blocks|key|746532|text|这是一个用Delphi编写的解决方案，我对它进行了修改，并将其放入一个服务中，以便在一个非常大的企业中使用。访问：link+text|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|746533|查找"scapi+(Setup+&+Config+Manager+API)"，并下载它。将有一个名为USBView的演示程序，它将带您上路。如果你有Delphi，这也包括一个TUSBDeviceTree组件，你可以用它来收集关于USB设备的信息。|746534|问候|746535|entityMap|0|LINK|mutability|MUTABLE|url|http://jedi-apilib.sourceforge.net/^0|1L|9|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Here's a solution in Delphi, that I've modified and put into a service for use in a very large enterprise. Go to: <a href="http://jedi-apilib.sourceforge.net/" rel="nofollow noreferrer">link text</a>

Look for "scapi (Setup &amp; Config Manager API)", and download it. There will be a demo program called USBView that will get you on your way. If you have Delphi, this also includes a TUSBDeviceTree component that you can use to gather information about a USB device when.

Regards

blocks|key|3831483|text|#include<SetupAPI.h>
#include+<windows.h>++
#include<initguid.h>
#include+<newdev.h>
#include+<Cfgmgr32.h>

#pragma+comment(lib,+"Cfgmgr32.lib")
#pragma+comment(lib,+"Setupapi.lib")
#pragma+comment(lib,+"Newdev.lib")

int+RemoveDevice(const+GUID+*guid,+const+wchar_t+*hwID)+{
++++HDEVINFO+m_hDevInfo;
++++SP_DEVICE_INTERFACE_DATA+++++++++spdid;
++++SP_DEVINFO_DATA++++++++++++++++++spdd;
++++DWORD++++++++++++++++++++++++++++dwSize;
++++BYTE+Buf[1024];
++++PSP_DEVICE_INTERFACE_DETAIL_DATA+pspdidd+=
++++++++(PSP_DEVICE_INTERFACE_DETAIL_DATA)Buf;

++++printf("try+to+remove+device::%25ws\n",+hwID);

++++m_hDevInfo+=+SetupDiGetClassDevs(guid,+NULL,+NULL,+DIGCF_PRESENT%7C+DIGCF_DEVICEINTERFACE);
++++if+(m_hDevInfo+==+INVALID_HANDLE_VALUE)
++++{
++++++++printf("GetClassDevs+Failed!\n");
++++++++return+0;
++++}
++++spdid.cbSize+=+sizeof(spdid);
++++for+(int+i+=+0;+SetupDiEnumDeviceInterfaces(m_hDevInfo,+NULL,+guid,+i,+&spdid);+i%2B%2B)+{
++++++++dwSize+=+0;
++++++++SetupDiGetDeviceInterfaceDetail(m_hDevInfo,
++++++++++++&spdid,+NULL,+0,+&dwSize,+NULL);
++++++++if+(dwSize+!=+0+&&+dwSize+<=+sizeof(Buf))+{
++++++++++++pspdidd->cbSize+=+sizeof(*pspdidd);+//+5+Bytes!

++++++++++++ZeroMemory((PVOID)&spdd,+sizeof(spdd));
++++++++++++spdd.cbSize+=+sizeof(spdd);

++++++++++++long+res+=
++++++++++++++++SetupDiGetDeviceInterfaceDetail(m_hDevInfo,+&
++++++++++++++++++++spdid,+pspdidd,
++++++++++++++++++++dwSize,+&dwSize,
++++++++++++++++++++&spdd);
++++++++++++if+(res)+{
++++++++++++++++OLECHAR*+guidString;
++++++++++++++++OLECHAR*+guidString2;
++++++++++++++++StringFromCLSID(&spdd.ClassGuid,+&guidString);
++++++++++++++++StringFromCLSID(&spdid.InterfaceClassGuid,+&guidString2);
++++++++++++++++printf("%25d,+%25ws,+%25ws,+%25ws\n",+spdd.DevInst,+pspdidd->DevicePath,+guidString,+guidString2);
++++++++++++++++CoTaskMemFree(guidString);
++++++++++++++++CoTaskMemFree(guidString2);
++++++++++++++++if+(!memcmp(pspdidd->DevicePath,+hwID,+2+*+lstrlenW(hwID)))+{
++++++++++++++++++++DEVINST+DevInstParent+=+0;
++++++++++++++++++++res+=+CM_Get_Parent(&DevInstParent,+spdd.DevInst,+0);
++++++++++++++++++++for+(long+tries+=+0;+tries+<+10;+tries%2B%2B)+{
++++++++++++++++++++++++//+sometimes+we+need+some+tries...
++++++++++++++++++++++++WCHAR+VetoNameW[MAX_PATH];
++++++++++++++++++++++++PNP_VETO_TYPE+VetoType+=+PNP_VetoTypeUnknown;
++++++++++++++++++++++++VetoNameW[0]+=+0;

++++++++++++++++++++++++res+=+CM_Request_Device_EjectW(DevInstParent,
++++++++++++++++++++++++++++&VetoType,+VetoNameW,+MAX_PATH,+0);
++++++++++++++++++++++++if+((res+==+CR_SUCCESS+&&
++++++++++++++++++++++++++++VetoType+==+PNP_VetoTypeUnknown))+{
++++++++++++++++++++++++++++printf("remove+%25ws+success!\n",+pspdidd->DevicePath);
++++++++++++++++++++++++++++SetupDiDestroyDeviceInfoList(m_hDevInfo);
++++++++++++++++++++++++++++return+1;
++++++++++++++++++++++++}
++++++++++++++++++++++++Sleep(500);+//+required+to+give+the+next+tries+a+chance!
++++++++++++++++++++}
++++++++++++++++++++break;
++++++++++++++++}
++++++++++++}
++++++++}
++++}
++++printf("Remove+Device+Failed!\n");
++++SetupDiDestroyDeviceInfoList(m_hDevInfo);
++++return+0;
}

int+main(){
++++GUID+GUID_DEVINTERFACE_USB_HUB;
++++CLSIDFromString(L"F18A0E88-C30C-11D0-8815-00A0C906BED8",+&GUID_DEVINTERFACE_USB_HUB);

++++RemoveDevice(&GUID_DEVINTERFACE_USB_HUB,+L"\\\\?\\usb#root_hub30");
++++return+0;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3831484|参考：|unstyled|3831485|How+to+Prepare+a+USB+Drive+for+Safe+Removal|offset|length|3831486|GUID_DEVINTERFACE|3831487|entityMap|0|LINK|mutability|MUTABLE|url|https://www.codeproject.com/Articles/13839/How-to-Prepare-a-USB-Drive-for-Safe-Removal|1|https://www.pinvoke.net/default.aspx/Constants/GUID_DEVINTERFACE.html^0|0|0|0|17|0|0|0|H|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@$I|13|J|14|1|15]]|A|$]]|$1|M|3|-4|5|F|7|16|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

<pre class="lang-c prettyprint-override"><code>#include&lt;SetupAPI.h&gt;
#include &lt;windows.h&gt; 
#include&lt;initguid.h&gt;
#include &lt;newdev.h&gt;
#include &lt;Cfgmgr32.h&gt;

#pragma comment(lib, &quot;Cfgmgr32.lib&quot;)
#pragma comment(lib, &quot;Setupapi.lib&quot;)
#pragma comment(lib, &quot;Newdev.lib&quot;)

int RemoveDevice(const GUID *guid, const wchar_t *hwID) {
 HDEVINFO m_hDevInfo;
 SP_DEVICE_INTERFACE_DATA spdid;
 SP_DEVINFO_DATA spdd;
 DWORD dwSize;
 BYTE Buf[1024];
 PSP_DEVICE_INTERFACE_DETAIL_DATA pspdidd =
 (PSP_DEVICE_INTERFACE_DETAIL_DATA)Buf;

 printf(&quot;try to remove device::%ws\n&quot;, hwID);

 m_hDevInfo = SetupDiGetClassDevs(guid, NULL, NULL, DIGCF_PRESENT| DIGCF_DEVICEINTERFACE);
 if (m_hDevInfo == INVALID_HANDLE_VALUE)
 {
 printf(&quot;GetClassDevs Failed!\n&quot;);
 return 0;
 }
 spdid.cbSize = sizeof(spdid);
 for (int i = 0; SetupDiEnumDeviceInterfaces(m_hDevInfo, NULL, guid, i, &amp;spdid); i++) {
 dwSize = 0;
 SetupDiGetDeviceInterfaceDetail(m_hDevInfo,
 &amp;spdid, NULL, 0, &amp;dwSize, NULL);
 if (dwSize != 0 &amp;&amp; dwSize &lt;= sizeof(Buf)) {
 pspdidd-&gt;cbSize = sizeof(*pspdidd); // 5 Bytes!

 ZeroMemory((PVOID)&amp;spdd, sizeof(spdd));
 spdd.cbSize = sizeof(spdd);

 long res =
 SetupDiGetDeviceInterfaceDetail(m_hDevInfo, &amp;
 spdid, pspdidd,
 dwSize, &amp;dwSize,
 &amp;spdd);
 if (res) {
 OLECHAR* guidString;
 OLECHAR* guidString2;
 StringFromCLSID(&amp;spdd.ClassGuid, &amp;guidString);
 StringFromCLSID(&amp;spdid.InterfaceClassGuid, &amp;guidString2);
 printf(&quot;%d, %ws, %ws, %ws\n&quot;, spdd.DevInst, pspdidd-&gt;DevicePath, guidString, guidString2);
 CoTaskMemFree(guidString);
 CoTaskMemFree(guidString2);
 if (!memcmp(pspdidd-&gt;DevicePath, hwID, 2 * lstrlenW(hwID))) {
 DEVINST DevInstParent = 0;
 res = CM_Get_Parent(&amp;DevInstParent, spdd.DevInst, 0);
 for (long tries = 0; tries &lt; 10; tries++) {
 // sometimes we need some tries...
 WCHAR VetoNameW[MAX_PATH];
 PNP_VETO_TYPE VetoType = PNP_VetoTypeUnknown;
 VetoNameW[0] = 0;

 res = CM_Request_Device_EjectW(DevInstParent,
 &amp;VetoType, VetoNameW, MAX_PATH, 0);
 if ((res == CR_SUCCESS &amp;&amp;
 VetoType == PNP_VetoTypeUnknown)) {
 printf(&quot;remove %ws success!\n&quot;, pspdidd-&gt;DevicePath);
 SetupDiDestroyDeviceInfoList(m_hDevInfo);
 return 1;
 }
 Sleep(500); // required to give the next tries a chance!
 }
 break;
 }
 }
 }
 }
 printf(&quot;Remove Device Failed!\n&quot;);
 SetupDiDestroyDeviceInfoList(m_hDevInfo);
 return 0;
}

int main(){
 GUID GUID_DEVINTERFACE_USB_HUB;
 CLSIDFromString(L&quot;F18A0E88-C30C-11D0-8815-00A0C906BED8&quot;, &amp;GUID_DEVINTERFACE_USB_HUB);

 RemoveDevice(&amp;GUID_DEVINTERFACE_USB_HUB, L&quot;\\\\?\\usb#root_hub30&quot;);
 return 0;
}
</code></pre>
refrences:
<a href="https://www.codeproject.com/Articles/13839/How-to-Prepare-a-USB-Drive-for-Safe-Removal" rel="nofollow noreferrer">How to Prepare a USB Drive for Safe Removal</a>
<a href="https://www.pinvoke.net/default.aspx/Constants/GUID_DEVINTERFACE.html" rel="nofollow noreferrer">GUID_DEVINTERFACE</a>

How do I remove a USB drive using the Win32 API? I do a lot of work on embedded systems and on one of these I have to copy my programs on a USB stick and insert it into the target hardware.

Since I mostly work on the console I don't like to use the mouse and click on the small task-bar icon hundred times a day. 

I'd love to write a little program to do exactly that so I can put it into my makefiles, but I haven't found any API call that does the same thing.

Any ideas?

Safely remove a USB drive using the Win32 API?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何使用Win32应用编程接口移除U盘？我在嵌入式系统上做了很多工作，在其中一个系统上，我必须将我的程序复制到U盘上，并将其插入目标硬件中。因为我主要在控制台上工作，所以我不喜欢每天用鼠标点击任务栏上的小图标几百次。我很想写一个小程序来做这件事，这样我就可以把它放到我的makefile中，但我还没有找到任何做同样事情的API调用。有什么想法吗？

问使用Win32应用编程接口安全地移除U盘？
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