Simple question, please help?!
Quote:
> > I am using an API call, SetWindowsHookEx, to capture systems messages.
> > However, one of the arguments needs a Long value. I want to pass a null
> > value to the call, to capture system-wide messages. How can I pass Null
> > to the function, without giving an invalid type?
> > ...
> Try 0, if it is a string try vbNullString
vbNullString should work, as I imagine it's a long. If unsure, though,
use 0& (rather than 0 which is 'only' an integer). Or declare yourself a
Const NilPtr As Long = 0&
and use NilPtr where you will.
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