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CheckPointer

  • Artigo
 
Microsoft DirectShow 9.0

CheckPointer

Checks whether a pointer is NULL. If the pointer is NULL, the function or method in which the macro appears returns the specified value.

Syntax

  CheckPointer(
    p,
    ret
);

Parameters

p

Pointer to check.

ret

Value that the function or method returns if p is NULL.

Example

HRESULT MyFunction(VOID *pSomeParameter)
{
    CheckPointer(pSomeParameter, E_INVALIDARG)

    // Rest of the function (not shown).
}

Requirements

**  Header:** Declared in Wxdebug.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also