MFC操作注册表常用函数

1 open a registry key/query registry/modify value

 

HKEY hKey;
 LPCTSTR keyStr1 = "Software//Microsoft//Windows//CurrentVersion//Policies//Explorer//";
 DWORD dwType;
 DWORD dwValue;
 DWORD dwSize;

 if(::RegOpenKeyEx(HKEY_CURRENT_USER,keyStr1, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS)
 {
  dwType = REG_DWORD;
  dwSize = sizeof(DWORD);

  if(::RegQueryValueEx(hKey,"ClearRecentDocsonExit",NULL,&dwType,(LPBYTE)&dwValue,&dwSize) == ERROR_SUCCESS)
  {
   if(dwValue == 1)
   {
    dwValue = 0;
    if(::RegSetValueEx(hKey,"ClearRecentDocsonExit",NULL,REG_DWORD,(CONST BYTE *)&dwValue,sizeof(DWORD)) == ERROR_SUCCESS)
    {
     return FALSE;
    }
    else
    {
     return FALSE;
    }
   }

  }

 }
 else
 {

 }
 RegCloseKey(hKey);

 

2 create registry key/create a new value and set a value for the key

 

HKEY hKey;
 LPCTSTR keyStr1 = "Software//Microsoft//Windows//CurrentVersion//Policies//Test//";
    DWORD dwDescription;
 DWORD dwValue = 1;
 if(::RegCreateKeyEx(HKEY_CURRENT_USER,keyStr1, 0, NULL,REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hKey,&dwDescription) == ERROR_SUCCESS)
 {
  if(::RegSetValueEx(hKey,"ClearRecentDocsonExit",NULL,REG_DWORD,(CONST BYTE *)&dwValue,sizeof(DWORD)) == ERROR_SUCCESS)
  {
   return FALSE;
  }
  else
  {
   return FALSE;
  }
 }
 else
 {

 }
 RegCloseKey(hKey);