需要修改一个数据库默认存储路径的地址,所以写了几个个修改注册表的函数主要就是用到了RegOpenKeyEx()和RegQueryValueEx()还有RegSetValueEx()

其实就是用RegOpenKeyEx()打开注册表 操作了一下而已...

1,查询用户数据库数据默认存储路径

 1 void QueryData() 
 2 {
 3     // TODO: Add your control notification handler code here
 4     HKEY hKey;
 5     LPCTSTR data_Set="Software\Microsoft\Microsoft SQL Server\MSSQL10.MSSQL\MSSQLServer";
 6     long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE,data_Set,0,KEY_READ,&hKey));
 7     if(ret0!=ERROR_SUCCESS){
 8         MessageBox("无法打开文件");
 9         return ;
10     }
11     
12     LPBYTE DefaultData_Get=new BYTE[80];
13     DWORD type1=REG_SZ;
14     DWORD cbData1=80;
15     
16     long ret1=::RegQueryValueEx(hKey,"DefaultData",NULL,&type1,DefaultData_Get,&cbData1);
17     if(ret1!=ERROR_SUCCESS){
18         MessageBox("无法打开文件");
19         return;
20     }
21     
22     CString str_DefaultData=DefaultData_Get;
23     delete [] DefaultData_Get;
24     
25     MessageBox(str_DefaultData);
26 
27     ::RegCloseKey(hKey);
28     
29 }

2,修改用户数据库数据默认存储路径为UPDATEDATA  

 1  #define  UPDATEDATA  "F:\test" 

     void UpDateDataR() 
 2 {
 3     // TODO: Add your control notification handler code here
 4     HKEY hKey;
 5     LPCTSTR data_Set="Software\Microsoft\Microsoft SQL Server\MSSQL10.MSSQL\MSSQLServer";
 6     long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE,data_Set,0,KEY_WRITE,&hKey));
 7     if(ret0!=ERROR_SUCCESS){
 8         MessageBox("无法打开文件");
 9         return ;
10     }
11      
12     CString DataStr=UPDATEDATA ;
13     LPBYTE lpctDataStr=CString_To_LPBYTE(DataStr);
14 
15     DWORD type1=REG_SZ; 
16     DWORD cbData1=DataStr.GetLength()+1; 
17 
18     long ret1=::RegSetValueEx(hKey, "DefaultData", NULL, 
19         type1, lpctDataStr, cbData1); 
20     if(ret1!=ERROR_SUCCESS) 
21     { 
22         MessageBox("错误: 无法修改有关注册表信息!"); 
23         return; 
24     } 
25      
26   ::RegCloseKey(hKey);
27   MessageBox("修改成功");
28 
29 
30 
31     
32 }

3查询用户数据库日志log默认存储路径

 1 void  Querylog() 
 2 {
 3     // TODO: Add your control notification handler code hereHKEY hKey;
 4     HKEY hKey;
 5     LPCTSTR log_Set="Software\Microsoft\Microsoft SQL Server\MSSQL10.MSSQL\MSSQLServer";
 6     long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE,log_Set,0,KEY_READ,&hKey));
 7     if(ret0!=ERROR_SUCCESS){
 8         MessageBox("无法打开文件");
 9         return ;
10     }
11     
12     LPBYTE Defaultlog_Get=new BYTE[80];
13     DWORD type1=REG_SZ;
14     DWORD cbData1=80;
15     
16     long ret1=::RegQueryValueEx(hKey,"Defaultlog",NULL,&type1,Defaultlog_Get,&cbData1);
17     if(ret1!=ERROR_SUCCESS){
18         MessageBox("无法打开文件");
19         return;
20     }
21     
22     CString str_DefaultData=Defaultlog_Get;
23     delete [] Defaultlog_Get;
24     
25     MessageBox(str_DefaultData);
26     
27     ::RegCloseKey(hKey);
28     
29 
30     
31 }

4修改用户数据库日志log默认存储路径为UPDATEDATA  

#define UPDATELOG "F:\test"
void UpDatalog() 
{
    // TODO: Add your control notification handler code here
    HKEY hKey;
    LPCTSTR log_Set="Software\Microsoft\Microsoft SQL Server\MSSQL10.MSSQL\MSSQLServer";
    long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE,log_Set,0,KEY_WRITE,&hKey));
    if(ret0!=ERROR_SUCCESS){
        MessageBox("无法打开文件");
        return ;
    }
    
    CString logStr=UPDATELOG ;
    LPBYTE lpctDataStr=CString_To_LPBYTE(logStr);
    
    DWORD type1=REG_SZ; 
    DWORD cbData1=logStr.GetLength()+1; 
    
    long ret1=::RegSetValueEx(hKey, "Defaultlog", NULL, 
        type1, lpctDataStr, cbData1); 
    if(ret1!=ERROR_SUCCESS) 
    { 
        MessageBox("错误: 无法修改有关注册表信息!"); 
        return; 
    } 
    
    ::RegCloseKey(hKey);
    MessageBox("修改成功");
    
}