pinvoke.net: Edit: user32.IsWindow

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Summary: The IsWindowVisible API

!!!!C# Signature:
 /// <summary>
 ///     Determines the visibility state of the specified window.
 ///     <para>
 ///         Go to https://msdn.microsoft.com/en-us/library/windows/desktop/ms633530%28v=vs.85%29.aspx for more
 ///         information. For WS_VISIBLE information go to
 ///         https://msdn.microsoft.com/en-us/library/windows/desktop/ms632600%28v=vs.85%29.aspx
 ///     </para>
 /// </summary>
 /// <param name="hWnd">C++ ( hWnd [in]. Type: HWND )<br />A handle to the window to be tested.</param>
 /// <returns>
 ///     <c>true</c> or the return value is nonzero if the specified window, its parent window, its parent's parent
 ///     window, and so forth, have the WS_VISIBLE style; otherwise, <c>false</c> or the return value is zero.
 /// </returns>
 /// <remarks>
 ///     The visibility state of a window is indicated by the WS_VISIBLE[0x10000000L] style bit. When
 ///     WS_VISIBLE[0x10000000L] is set, the window is displayed and subsequent drawing into it is displayed as long as the
 ///     window has the WS_VISIBLE[0x10000000L] style. Any drawing to a window with the WS_VISIBLE[0x10000000L] style will
 ///     not be displayed if the window is obscured by other windows or is clipped by its parent window.
 /// </remarks>
 [DllImport("user32.dll")]
 [return: MarshalAs(UnmanagedType.Bool)]
 static extern bool IsWindowVisible(IntPtr hWnd);

!!!!VB.NET Signature:
 <DllImport("user32.dll", SetLastError:=True)> _
 Private Shared Function IsWindowVisible(ByVal hWnd As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
 End Function
!!!!VB.Signature
 Public Declare Function IsWindowVisible Lib "user32" _
                 (ByVal hWnd As Long) As Long
!!!!User-Defined Types:
None.

!!!!Notes:
None.

!!!!Tips & Tricks:
Please add some!

!!!!Sample Code:
F# code on windows 7
[<System.Runtime.InteropServices.DllImport("user32.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto)>]
extern bool IsWindowVisible(System.IntPtr hwnd)

let intPointer = System.IntPtr(get some int 64 pointer)
let isItShown = InteractiveNative.IsWindowVisible(intPointer)
isItShown    // Returns true or false.

!!!!Alternative Managed API:

The ManagedWindowsApi project (http://mwinapi.sourceforge.net) provides a 
class ManagedWinapi.SystemWindow that has a Visible property.

Documentation: IsWindowVisible@msdn on MSDN