VC修改组策略

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在组策略种设置的升级服务器，如下图

现在升级服务器地址变了，不能每一台机器都去改，网上查找一番，多数方法是直接修改注册表，测试过之后，发现直接修改注册表是不能生效的，要用IGroupPolicyObject修改才行。

#define INITGUID

#include <windows.h>
#include <Guiddef.h>
#include <Gpedit.h>
#define GPO_UPDATE_REG "SOFTWARE\\Policies\\Microsoft\\Windows\\WindowsUpdate"
BOOL SetGroup();
int main()
{
CoInitialize(NULL);
SetGroup();
CoUninitialize();
return 0;

}

BOOL SetGroup()
{
HKEY ghoKey, ghoSubKey, hSubKey;
IGroupPolicyObject *pGPO = NULL;
CoCreateInstance(CLSID_GroupPolicyObject, NULL, CLSCTX_ALL,IID_IGroupPolicyObject, (LPVOID*)&pGPO);
RegCreateKeyEx(HKEY_LOCAL_MACHINE, GPO_UPDATE_REG, 0,NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hSubKey, NULL);
RegSetValueEx(hSubKey,"WUServer", 0, REG_SZ, (const BYTE *)"http://192.168.1.33", strlen((char*)"http://192.168.1.33") + 1);
RegSetValueEx(hSubKey,"WUStatusServer", 0, REG_SZ, (const BYTE *)"http://192.168.1.33", strlen((char*)"http://192.168.1.33") + 1);
pGPO->OpenLocalMachineGPO(GPO_OPEN_LOAD_REGISTRY);
pGPO->GetRegistryKey(GPO_SECTION_MACHINE,&ghoKey);
RegCreateKeyEx(ghoKey, GPO_UPDATE_REG, 0,NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &ghoSubKey, NULL);
RegSetValueEx(ghoSubKey,"WUServer", 0, REG_SZ, (const BYTE *)"http://192.168.1.33", strlen((char*)"http://192.168.1.33") + 1);
RegSetValueEx(ghoSubKey,"WUStatusServer", 0, REG_SZ, (const BYTE *)"http://192.168.1.33", strlen((char*)"http://192.168.1.33") + 1);
GUID RegistryId = REGISTRY_EXTENSION_GUID;
//save method 的第一个参数一定要True
pGPO->Save(TRUE,TRUE,const_cast<GUID*>(&RegistryId),const_cast<GUID*>(&CLSID_GPESnapIn));
pGPO->Release();
RegCloseKey(ghoKey);
RegCloseKey(ghoSubKey);
return TRUE;

}

网上比较全的是这篇文章：http://blogs.msdn.com/b/dsadsi/archive/2009/07/23/working-with-group-policy-objects-programmatically-simple-c-example-illustrating-how-to-modify-a-registry-based-policy.aspx

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