Help: DirectSound question

[Lost User]

How do I pass a buffer of samples in the DirectSoundBuffer.WriteBuffer method under vb.net? In the docs, the following is OK, but under vb.net the compiler complains that buf(0) can't be converted to a System.IntPtr ds.writebuffer(0,0,buf(0),flags) How do I write the buffer of raw samples to the directsoundsecondarybuffer8 under vb.net? Thanks