How to: Write Data to the Windows Registry (C++/CLI)

The latest version of this topic can be found at How to: Write Data to the Windows Registry (C++/CLI).

The following code example uses the CurrentUser key to create a writable instance of the RegistryKey class corresponding to the Software key. The CreateSubKey method is then used to create a new key and add to key/value pairs.

Example

Code

// registry_write.cpp  
// compile with: /clr  
using namespace System;  
using namespace Microsoft::Win32;  
  
int main()  
{  
   // The second OpenSubKey argument indicates that  
   // the subkey should be writable.   
   RegistryKey^ rk;  
   rk  = Registry::CurrentUser->OpenSubKey("Software", true);  
   if (!rk)  
   {  
      Console::WriteLine("Failed to open CurrentUser/Software key");  
      return -1;  
   }  
  
   RegistryKey^ nk = rk->CreateSubKey("NewRegKey");  
   if (!nk)  
   {  
      Console::WriteLine("Failed to create 'NewRegKey'");  
      return -1;  
   }  
  
   String^ newValue = "NewValue";  
   try  
   {  
      nk->SetValue("NewKey", newValue);  
      nk->SetValue("NewKey2", 44);  
   }  
   catch (Exception^)  
   {  
      Console::WriteLine("Failed to set new values in 'NewRegKey'");  
      return -1;  
   }  
  
   Console::WriteLine("New key created.");  
   Console::Write("Use REGEDIT.EXE to verify ");  
   Console::WriteLine("'CURRENTUSER/Software/NewRegKey'\n");  
   return 0;  
}  

Remarks

You can use the .NET Framework to access the registry with the Registry and RegistryKey classes, which are both defined in the Microsoft.Win32 namespace. The Registry class is a container for static instances of the RegistryKey class. Each instance represents a root registry node. The instances are ClassesRoot, CurrentConfig, CurrentUser, LocalMachine, and Users.

See Also

How to: Read Data from the Windows Registry (C++/CLI)
.NET Programming with C++/CLI (Visual C++)