how to get / set the Windows Registry

Example 1: Getting a string value from the Windows Registry

static str getRegistryStringValue(int _registryRoot, str _registryPath, str _registryKey)
{
   //gets the value of a string key in the registry
   //
   //sample call:
   //MyClass::getRegistryStringValue(#HKEY_CURRENT_USER,  @’Software\My Settings\Samples’, ‘SampleKey’);
   #winapi
   int         readReg;
   container   regRead;
   str         regKeyValue;
   readReg = winapi::regOpenKey(_registryRoot, _registryPath, #KEY_READ);
   if (readReg)
   {
    regRead = WinAPI::regGetValue(readReg, _registryKey);
    regKeyValue = conPeek(regRead, 1);
    WinAPI::regCloseKey(readReg);
   }
   return regKeyValue;
}

Example 2: Setting a string value from the Windows Registry

static void setRegistryStringValue(int _registryRoot, str _registryPath, str _registryKey, str _registryValue)
{
   //writes a string value to a key in the registry
   //if the key doesn’t exist, it creates it and
   //then writes the value.
   //sample call:
   //MyClass::setRegistryStringValue(#HKEY_CURRENT_USER,  @’Software\ My Settings\Samples’, ‘SampleKey’, ’2′);
   #winapi
   int         writePathReg;
   container   regWrite;
   writePathReg = winapi::regOpenKey(_registryRoot, _registryPath, #KEY_WRITE);
   if (writePathReg)   //the parent key exists and we opened it
   {
    //write the key and its value
    WinAPI::regSetValueEx(writePathReg, _registryKey, #REG_SZ, _registryValue);
    WinAPI::regCloseKey(writePathReg);
   }
   else           //the parent key doesn’t exist, we have to create it
   {
    regWrite = winapi::regCreateKeyEx(_registryRoot, _registryPath);
    if (regWrite) //now the parent key exists
    {
     //open the parent key
     writePathReg = winapi::regOpenKey(_registryRoot, _registryPath, #KEY_WRITE);
     if (writePathReg)
     {
      //write the key and its value
      WinAPI::regSetValueEx(writePathReg, _registryKey, #REG_SZ, _registryValue);
      WinAPI::regCloseKey(writePathReg);
     }
    }
   }
}