How to get tooltip handle in NET

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.NET ToolTip control doesn't expose Handle property. Then we should use InvokeMember to retrieve that property

The following function returns the handle:

Public Shared Function GetToolTipHandle(ByVal ctrlToolTip As ToolTip) As IntPtr

       Dim obj As Object
       Dim hwnd As IntPtr
       Try
           hwnd = IntPtr.Zero
           obj = GetType(ToolTip).InvokeMember("Handle", Reflection.BindingFlags.NonPublic Or Reflection.BindingFlags.Instance Or Reflection.BindingFlags.GetProperty, Nothing, ctrlToolTip, Nothing)
           hwnd = CType(obj, IntPtr)
       Catch ex As Exception

       End Try
       Return hwnd

End Function

How to use the function in your program:

Dim hwnd as IntPtr = GetToolTipHandle(ToolTip1)

To convert the pointer to numeric(integer) use like this:

hwnd.toInt32()