C# Signature:
/// <summary>
/// Removes a hook procedure installed in a hook chain by the SetWindowsHookEx function.
/// <para>
/// See [ https://msdn.microsoft.com/en-us/library/windows/desktop/ms644993%28v=vs.85%29.aspx ] for more
/// information
/// </para>
/// </summary>
/// <param name="hhk">
/// C++ ( hhk [in]. Type: HHOOK )<br />A handle to the hook to be removed. This parameter is a hook
/// handle obtained by a previous call to <see cref="SetWindowsHookEx" />.
/// </param>
/// <returns>
/// C++ ( Type: BOOL )
/// <c>true</c> or nonzero if the function succeeds, <c>false</c> or zero if the function fails.
/// <para>
/// To get extended error information, call
/// <see cref="!:https://msdn.microsoft.com/en-us/library/windows/desktop/ms679360%28v=vs.85%29.aspx">GetLastError</see>
/// .
/// </para>
/// <para>The return value is the calling thread's last-error code.</para>
/// The Return Value section of the documentation for each function that sets the last-error code notes the conditions
/// under which the function sets the last-error code. Most functions that set the thread's last-error code set it when
/// they fail. However, some functions also set the last-error code when they succeed. If the function is not
/// documented to set the last-error code, the value returned by this function is simply the most recent last-error
/// code to have been set; some functions set the last-error code to 0 on success and others do not.
/// <para></para>
/// </returns>
/// <remarks>
/// <para>
/// The hook procedure can be in the state of being called by another thread even after UnhookWindowsHookEx
/// returns. If the hook procedure is not being called concurrently, the hook procedure is removed immediately
/// before <see cref="UnhookWindowsHookEx" /> returns.
/// </para>
/// <para>
/// For an example, see
/// <see cref="!:https://msdn.microsoft.com/en-us/library/windows/desktop/ms644960%28v=vs.85%29.aspx#system_events">
/// Monitoring
/// System Events
/// </see>
/// .
/// </para>
/// </remarks>
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool UnhookWindowsHookEx(IntPtr hhk);
VB.NET Signature:
<DllImport("user32.dll", SetLastError := True)> _
Public Shared Function UnhookWindowsHookEx(ByVal hhk As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
VB Signature:
Public Declare Function UnhookWindowsHookEx Lib "user32" _
(ByVal hHook As Long) As Long
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
Please add some!
Alternative Managed API:
The ManagedWindowsApi project (http://mwinapi.sourceforge.net) provides a Hook class and subclasses for Journal hooks, Message hooks and Low-Level hooks.
