C# Signature:

[DllImport("user32.dll")]
static extern IntPtr GetTopWindow(IntPtr hWnd);

vb.net Signature:

<DllImport("USER32.dll")> Public Shared Function GetTopWindow (ByVal hwnd As IntPtr) As IntPtr
End Function  

Private Declare Function GetTopWindow Lib "user32.dll" (ByVal hwnd As IntPtr) As IntPtr

User-Defined Types:

None.

Notes:

https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-gettopwindow

None.

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Sample Code:

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