Easy peasy.

In Vb6 it would have been:

VB Code:
  1. 'VB6
  2. If p Imp q then
  3. ...
  4. End If

But Imp (implication) is no longer supported in VB.net so...
VB Code:
  1. 'VB.Net
  2. If (not p) or q then
  3. ...
  4. End If