我已经安装了winxp ddk.在VC的Tool->Option中也已经将库所在的路径设置好了,但始终出现错误.
如果将这个函数(CM_Request_Device_Eject())不用就可以编译通过了.但usb却没办法移除了.--------------------Configuration: removusb - Win32 Debug--------------------
Compiling...
removusb.cpp
Linking...
removusb.obj : error LNK2001: unresolved external symbol __imp__CM_Request_Device_EjectA@20
Debug/removusb.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.removusb.exe - 2 error(s), 0 warning(s)代码如下:#include <tchar.h>
#include <stdio.h>
#include <windows.h>
#include <devguid.h>
#define DWORD_PTR DWORD
#define ULONG_PTR DWORD
extern "C" {
#include "hidsdi.h"
}
// 需加入hid.lib
#include <setupapi.h>
// 需加入setupapi.lib
#pragma comment(lib,"setupapi.lib")
#include <regstr.h>
#include <winbase.h>
#include <cfgmgr32.h>
// 需要加入cfgmgr32.lib
#pragma comment(lib,"cfgmgr32.lib")
#include <initguid.h>
//#include <usbiodef.h>
DEFINE_GUID(GUID_DEVINTERFACE_USB_DEVICE,
0xA5DCBF10L, 0x6530, 0x11D2, 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED);
#define GUID_CLASS_USB_DEVICE GUID_DEVINTERFACE_USB_DEVICE
int main(int argc, _TCHAR* argv[])
{
HDEVINFO hDevInfo;
SP_DEVINFO_DATA DeviceInfoData;
DWORD i;
//--------------------------------------------------------------------------
// 获取设备信息
hDevInfo = SetupDiGetClassDevs((LPGUID)&GUID_CLASS_USB_DEVICE,
0, // Enumerator
0,
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE );
if (hDevInfo == INVALID_HANDLE_VALUE) {
// 查询信息失败
printf("ERROR - SetupDiGetClassDevs()");
return 1;
}
//--------------------------------------------------------------------------
// 枚举每个USB设备
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (i=0;SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData);i++)
{
LPTSTR buffer = NULL;
PVOID buffer2 = NULL;
DWORD buffersize = 0;
ULONG len;
CONFIGRET cr;
PNP_VETO_TYPE pnpvietotype;
CHAR vetoname[MAX_PATH];
ULONG ulStatus;
ULONG ulProblemNumber;
cr = CM_Get_DevNode_Status( &ulStatus,
&ulProblemNumber,
DeviceInfoData.DevInst,
0);
if ( CR_SUCCESS == cr ) {
printf("OK - CM_Get_DevNode_Status()[%d]\n", cr);
printf("OK - CM_Get_DevNode_Status() sts [%x]\n", ulStatus);
printf("OK - CM_Get_DevNode_Status() pro [%x]\n", ulProblemNumber);
} else {
printf("ERROR - CM_Get_DevNode_Status()[%d]\n", cr);
printf("ERROR - CM_Get_DevNode_Status()[%d]\n", GetLastError());
}
// DN_DISABLEABLE or DN_REMOVABLE
if ((DN_DISABLEABLE & ulStatus ) != 0 ) {
printf("HAS - DN_DISABLEABLE()[%x]\n", DN_DISABLEABLE & ulStatus);
} else {
continue;
}
if ((DN_REMOVABLE & ulStatus ) != 0 ) {
printf("HAS - DN_REMOVABLE()[%x]\n", DN_REMOVABLE & ulStatus);
} else {
continue;
}
len = MAX_PATH;
// pnpvietotype = PNP_VetoDevice;
cr = CM_Request_Device_Eject(
DeviceInfoData.DevInst,
&pnpvietotype,
vetoname,
len,
0
);
if ( CR_SUCCESS == cr ) {
printf("OK - CM_Request_Device_Eject()[%d]\n", cr);
} else {
printf("ERROR - CM_Request_Device_Eject()[%d]\n", cr);
printf("ERROR - CM_Request_Device_Eject()[%d]\n", GetLastError());
}
}
if ( GetLastError()!=NO_ERROR &&
GetLastError()!=ERROR_NO_MORE_ITEMS )
{
// Insert error handling here.
return 1;
}
// Cleanup
SetupDiDestroyDeviceInfoList(hDevInfo);
return 0;
}
如果将这个函数(CM_Request_Device_Eject())不用就可以编译通过了.但usb却没办法移除了.--------------------Configuration: removusb - Win32 Debug--------------------
Compiling...
removusb.cpp
Linking...
removusb.obj : error LNK2001: unresolved external symbol __imp__CM_Request_Device_EjectA@20
Debug/removusb.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.removusb.exe - 2 error(s), 0 warning(s)代码如下:#include <tchar.h>
#include <stdio.h>
#include <windows.h>
#include <devguid.h>
#define DWORD_PTR DWORD
#define ULONG_PTR DWORD
extern "C" {
#include "hidsdi.h"
}
// 需加入hid.lib
#include <setupapi.h>
// 需加入setupapi.lib
#pragma comment(lib,"setupapi.lib")
#include <regstr.h>
#include <winbase.h>
#include <cfgmgr32.h>
// 需要加入cfgmgr32.lib
#pragma comment(lib,"cfgmgr32.lib")
#include <initguid.h>
//#include <usbiodef.h>
DEFINE_GUID(GUID_DEVINTERFACE_USB_DEVICE,
0xA5DCBF10L, 0x6530, 0x11D2, 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED);
#define GUID_CLASS_USB_DEVICE GUID_DEVINTERFACE_USB_DEVICE
int main(int argc, _TCHAR* argv[])
{
HDEVINFO hDevInfo;
SP_DEVINFO_DATA DeviceInfoData;
DWORD i;
//--------------------------------------------------------------------------
// 获取设备信息
hDevInfo = SetupDiGetClassDevs((LPGUID)&GUID_CLASS_USB_DEVICE,
0, // Enumerator
0,
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE );
if (hDevInfo == INVALID_HANDLE_VALUE) {
// 查询信息失败
printf("ERROR - SetupDiGetClassDevs()");
return 1;
}
//--------------------------------------------------------------------------
// 枚举每个USB设备
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (i=0;SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData);i++)
{
LPTSTR buffer = NULL;
PVOID buffer2 = NULL;
DWORD buffersize = 0;
ULONG len;
CONFIGRET cr;
PNP_VETO_TYPE pnpvietotype;
CHAR vetoname[MAX_PATH];
ULONG ulStatus;
ULONG ulProblemNumber;
cr = CM_Get_DevNode_Status( &ulStatus,
&ulProblemNumber,
DeviceInfoData.DevInst,
0);
if ( CR_SUCCESS == cr ) {
printf("OK - CM_Get_DevNode_Status()[%d]\n", cr);
printf("OK - CM_Get_DevNode_Status() sts [%x]\n", ulStatus);
printf("OK - CM_Get_DevNode_Status() pro [%x]\n", ulProblemNumber);
} else {
printf("ERROR - CM_Get_DevNode_Status()[%d]\n", cr);
printf("ERROR - CM_Get_DevNode_Status()[%d]\n", GetLastError());
}
// DN_DISABLEABLE or DN_REMOVABLE
if ((DN_DISABLEABLE & ulStatus ) != 0 ) {
printf("HAS - DN_DISABLEABLE()[%x]\n", DN_DISABLEABLE & ulStatus);
} else {
continue;
}
if ((DN_REMOVABLE & ulStatus ) != 0 ) {
printf("HAS - DN_REMOVABLE()[%x]\n", DN_REMOVABLE & ulStatus);
} else {
continue;
}
len = MAX_PATH;
// pnpvietotype = PNP_VetoDevice;
cr = CM_Request_Device_Eject(
DeviceInfoData.DevInst,
&pnpvietotype,
vetoname,
len,
0
);
if ( CR_SUCCESS == cr ) {
printf("OK - CM_Request_Device_Eject()[%d]\n", cr);
} else {
printf("ERROR - CM_Request_Device_Eject()[%d]\n", cr);
printf("ERROR - CM_Request_Device_Eject()[%d]\n", GetLastError());
}
}
if ( GetLastError()!=NO_ERROR &&
GetLastError()!=ERROR_NO_MORE_ITEMS )
{
// Insert error handling here.
return 1;
}
// Cleanup
SetupDiDestroyDeviceInfoList(hDevInfo);
return 0;
}
谢谢!
一定加进去了,请问您能否在您的机器上试一下,那个代码是完整的.看是否能编译能过.
我的系统是winxp.
谢谢,但到底是库的什么问题呢?
您能帮试一下吗?
是不是还缺少了什么库?
谢谢!
我这两个都加了啊.
#include <setupapi.h>
// 需加入setupapi.lib
#pragma comment(lib,"setupapi.lib")
#include <regstr.h>
#include <winbase.h>
#include <cfgmgr32.h>
// 需要加入cfgmgr32.lib
#pragma comment(lib,"cfgmgr32.lib")
MITSMI(REGULAR)
您的系统装的是什么ddk呢?用的是winxp吗?会不会是版本的差异.
您那可以通过吗?To:bobob
也不知您那是否也可以通过,不过那个函数(CM_Request_Device_Eject()))好象不在"setupapi.h"中,
应该是在"cfgmgr32.h"中.但我的编译器却提示__imp__CM_Request_Device_EjectA@20 error,出了问题,多谢大家的回复.
LoadLibrary("setupapi.dll");GetProcAddress一定可以
马上结贴了.
谢谢大家.