VC 注册表读写

BYTE          Vals[256];
HKEY          hKEY;
//打开注册表，判断注册表项是否存在
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\WeldTech\\AirCondition\\"), 0, KEY_READ|KEY_WRITE, &hKEY) != ERROR_SUCCESS)
{ 
                  //不存在，创建注册表项
 if(::RegCreateKey(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\WeldTech\\AirCondition\\"), &hKEY) != ERROR_SUCCESS)
 {
   
 }
}   
::RegSetValueEx( hKEY, _T("SavePath"), 0, REG_SZ, (LPBYTE)(LPCTSTR)g_saveDataPath, 256 );     //s设置注册表的键和值，相当于创建了键
::RegCloseKey(hKEY);



//查询注册表
CString     g_saveDataPath ;
BYTE         Vals[256];
HKEY         hKEY;
DWORD    type_1 = REG_SZ;
DWORD   cbData_1 = 256;
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\WeldTech\\AirCondition\\"), 0, KEY_READ|KEY_WRITE, &hKEY) == ERROR_SUCCESS)
{ 
 if(::RegQueryValueEx(hKEY, _T("SavePath"), NULL,&type_1,(BYTE*)Vals, &cbData_1)==ERROR_SUCCESS)
 {
  CString strRead;
  strRead.Format(_T("%s"), Vals);
  strRead.Trim();
  g_saveDataPath = strRead;
 }
}
::RegCloseKey(hKEY);