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See http://www.pinvoke.net/default.aspx/kernel32/OpenProcess.html for the OpenProcess API.

C# Signature:

[DllImport("kernel32.dll", SetLastError=true)]
static extern IntPtr OpenProcess(UInt32 dwDesiredAccess, Boolean bInheritHandle, Int32 dwProcessId);

VB Signature:

<DllImport("kernel32.dll", SetLastError:=True)> _
Private Shared Function OpenProcess(ByVal dwDesiredAccess As UInteger, ByVal bInheritHandle As Boolean, ByVal dwProcessId As Integer) As IntPtr
End Function

User-Defined Types:

None.

Alternative Managed API:

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Notes:

Pass the returned handle to CloseHandle after you are done with it.

Tips & Tricks:

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Sample Code:

HandleWindow = OpenProcess(ProcessAccessFlags.VMRead,0, ProcessID);

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