正在阅读：不重启Windows更改IP地址的多种实现不重启Windows更改IP地址的多种实现

BOOL RegSetIP(LPCTSTR lpszAdapterName, LPCTSTR pIPAddress, LPCTSTR pNetMask, LPCTSTR pNetGate)
{
HKEY hKey;
string strKeyName = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\";
strKeyName += lpszAdapterName;
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,
strKeyName.c_str(),
0,
KEY_WRITE,
&hKey) != ERROR_SUCCESS)
return FALSE;

char mszIPAddress[100];
char mszNetMask[100];
char mszNetGate[100];

strncpy(mszIPAddress, pIPAddress, 98);
strncpy(mszNetMask, pNetMask, 98);
strncpy(mszNetGate, pNetGate, 98);

int nIP, nMask, nGate;

nIP = strlen(mszIPAddress);
nMask = strlen(mszNetMask);
nGate = strlen(mszNetGate);

*(mszIPAddress + nIP + 1) = 0x00; // REG_MULTI_SZ数据需要在后面再加个0
nIP += 2;

*(mszNetMask + nMask + 1) = 0x00;
nMask += 2;

*(mszNetGate + nGate + 1) = 0x00;
nGate += 2;

RegSetValueEx(hKey, "IPAddress", 0, REG_MULTI_SZ, (unsigned char*)mszIPAddress, nIP);
RegSetValueEx(hKey, "SubnetMask", 0, REG_MULTI_SZ, (unsigned char*)mszNetMask, nMask);
RegSetValueEx(hKey, "DefaultGateway", 0, REG_MULTI_SZ, (unsigned char*)mszNetGate, nGate);

RegCloseKey(hKey);

return TRUE;
}

　　3、调用DhcpNotifyConfigChange通知配置的改变

　　未公开函数DhcpNotifyConfigChange位于 dhcpcsvc.dll中，原型如下:

BOOL DhcpNotifyConfigChange(
LPWSTR lpwszServerName, // 本地机器为NULL
LPWSTR lpwszAdapterName, // 适配器名称
BOOL bNewIpAddress, // TRUE表示更改IP
DWORD dwIpIndex, // 指明第几个IP地址，如果只有该接口只有一个IP地址则为0
DWORD dwIpAddress, // IP地址
DWORD dwSubNetMask, // 子网掩码
int nDhcpAction ); // 对DHCP的操作 0:不修改, 1:启用 DHCP，2:禁用 DHCP

　　具体调用代码如下：

BOOL NotifyIPChange(LPCTSTR lpszAdapterName, int nIndex, LPCTSTR pIPAddress, LPCTSTR pNetMask)
{
BOOL bResult = FALSE;
HINSTANCE hDhcpDll;
DHCPNOTIFYPROC pDhcpNotifyProc;
WCHAR wcAdapterName[256];

MultiByteToWideChar(CP_ACP, 0, lpszAdapterName, -1, wcAdapterName,256);

if((hDhcpDll = LoadLibrary("dhcpcsvc")) == NULL)
return FALSE;

if((pDhcpNotifyProc = (DHCPNOTIFYPROC)GetProcAddress(hDhcpDll, "DhcpNotifyConfigChange")) != NULL)
if((pDhcpNotifyProc)(NULL, wcAdapterName, TRUE, nIndex, inet_addr(pIPAddress), inet_addr(pNetMask), 0) == ERROR_SUCCESS)
bResult = TRUE;

FreeLibrary(hDhcpDll);
return bResult;
}