Help me with SetCapture() plz

[MrPolite]

I dont know what I'm doing wrong. I'm tyring to use SetCapture and I get an error:

<DllImport("user32.dll")> _
    Private Function SetCapture(ByVal hwnd As IntPtr) As IntPtr
    End Function

I call the function like this:
SetCapture me.handle
here's the error
An unhandled exception of type 'System.InvalidProgramException' occurred in extracontrols.dll

Additional information: Error: PInvoke item (field,method) must be Static