C# Signature:

[DllImport("kernel32.dll")]
static extern bool VirtualProtectEx(IntPtr hProcess, IntPtr lpAddress,
   UIntPtr dwSize, uint flNewProtect, out uint lpflOldProtect);

VB.Net Signature:

    <DllImport("kernel32", CharSet:=CharSet.Auto, SetLastError:=True)> _
    Public Shared Function VirtualProtectEx(ByVal hProcess As IntPtr, ByVal lpAddress As IntPtr, ByVal dwSize As IntPtr, ByVal flNewProtect As Integer, ByRef lpflOldProtect As Integer) As Integer
    End Function

VB6 Signature:

    Public Declare Function VirtualProtectEx Lib "kernel32" (ByVal hProcess As Long, ByVal lpAddress As Any, ByVal dwSize As Long, ByVal flNewProtect As Long, ByVal lpflOldProtect As Long) As Long

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Please add some!

    In Essential C# 2.0 by Mark Michaelis, it is mentioned ref is to be used for lpflOldProtect rather than out because the callee can ignore the data passed with ref.

Sample Code:

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Alternative Managed API:

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http://msdn.microsoft.com/en-us/library/aa366899(VS.85).aspx

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