帮忙看看这段注册表操作的问题

[zqqq1]

HKEY hd;
hd=HKEY_LOCAL_MACHINE;
char* Regkeyname="System\\CurrentControlSet\\Services\\aaaaaa";
char *sclass="";
DWORD nbf=0;
LONG ret=RegCreateKeyEx(hd,Regkeyname,0,sclass,REG_OPTION_NON_VOLATILE,
KEY_READ|KEY_WRITE,NULL,&hd,&nbf);
if (REG_OPENED_EXISTING_KEY == nbf)
{
//如果存在就删掉
RegCloseKey(hd);
ret=RegDeleteKey(HKEY_LOCAL_MACHINE,Regkeyname);/**********************/
//重新创建
RegCreateKeyEx（HKEY_LOCAL_MACHINE,Regkeyname,0,sclass,REG_OPTION_NON_VOLATILE,
KEY_READ|KEY_WRITE,NULL,&hd,&nbf);
}

我用/**********************/标注的这一句结果返回是5，肯定是错了，就是没删掉，我想问问怎样才能删掉啊，完成功能很简单，就是创建指定的子键，如果存在就先删掉，然后再创建一下

[shangguancheng]

用这个试试
DWORD SHDeleteKey(HKEY hkey,LPCTSTR pszSubKey);

Header shlwapi.h
Import library shlwapi.lib

[goodboyws]

必须没有子健
RegDeleteKey
The RegDeleteKey function deletes a subkey.

Windows 95/98/Me: The function also deletes all subkeys and values. To delete a key only if the key has no subkeys or values, use the SHDeleteEmptyKey function.

Windows NT/2000 or later: The subkey to be deleted must not have subkeys. To delete a key and all its subkeys, you need to recursively enumerate the subkeys and delete them individually. To recursively delete keys, use the SHDeleteKey function.

LONG RegDeleteKey(
HKEY hKey, // handle to open key
LPCTSTR lpSubKey // subkey name
);
Parameters
hKey
[in] Handle to a currently open key or one of the following predefined reserved handle values:
HKEY_CLASSES_ROOT
HKEY_CURRENT_CONFIG
HKEY_CURRENT_USER
HKEY_LOCAL_MACHINE
HKEY_USERS
Windows NT/2000 or later: HKEY_PERFORMANCE_DATA
Windows 95/98/Me: HKEY_DYN_DATA

The key specified by the lpSubKey parameter must be a subkey of the key identified by hKey.

lpSubKey
[in] Pointer to a null-terminated string specifying the name of the key to delete. This parameter cannot be NULL.
Windows NT/2000 or later: The specified key must not have subkeys.

[shangguancheng]

RegDeleteKey必须有子键；SHDeleteKey属于Shell Function，可以直接删除。

[zqqq1]

真的可以了，可是为什么呢？给我讲讲原因，先给50分

[zqqq1]

可是下面有子键啊，但是也删不掉
改成这样RegDeleteKey(hd,Regkeyname);也删不掉啊，给个例子成不

[shangguancheng]

SHDeleteKey是Shell Function，其功能就和你手动操作注册表的动作一样。
RegDeleteKey必须子键为空，就像删除目录一样，子目录必须为空，可以用递归的方法也能实现删除。

[rabbitweng]

用CRegKey类吧,里面有个CRegKey::RecurseDeleteKey()函数应该能实现你的要求