Winform TextBox.Text: use EM_GETHANDLE?

As long as the Reference Sources are up to date (and match the ones compiled into .Net FX redists), System.Windows.Forms.TextBox.Text property inherits from Control.Text, which in turn uses WM_GETTEXT. My question: why not use EM_GETHANDLE, LocalLock, and then System.Runtime.InteropServices.Marshal.PtrToStringAuto(/Ansi/Uni)? Will this be faster?

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