C# Signature:

[DllImport("advapi32.dll", SetLastError=true)]
static extern int RegNotifyChangeKeyValue(IntPtr hKey, bool watchSubtree,
   int dwNotifyFilter, IntPtr hEvent, bool fAsynchronous);

VB Signature:

Declare Function RegNotifyChangeKeyValue Lib "advapi32.dll" (hKey As IntPtr, _
   watchSubtree As Boolean, dwNotifyFilter As Integer, hEvent As IntPtr,
   fAsynchronous As Boolean) As Integer

Notes:

Starting with the .NET Framework 2.0, the IntPtr parameters could be defined as SafeHandle instead.

Tips & Tricks:

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Sample Code:

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Alternative Managed API:

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