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/// Determines the visibility state of the specified window.
/// 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
/// <param name="hWnd">C++ ( hWnd [in]. Type: HWND )<br />A handle to the window to be tested.</param>
/// <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.
/// 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.
static extern bool IsWindowVisible(IntPtr hWnd);
<DllImport("user32.dll", SetLastError:=True)> _
Private Shared Function IsWindowVisible(ByVal hWnd As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
Public Declare Function IsWindowVisible Lib "user32" _
(ByVal hWnd As Long) As Long