CheckPointer (Compact 2013)
3/26/2014
This macro determines if a given pointer is NULL. If the pointer is NULL, CheckPointer returns a user-defined value.
Syntax
CheckPointer(
p,
ret
);
Parameters
- p
Pointer to check.
- ret
Value your function will return if p is NULL.
Remarks
The following examples shows how to call this macro.
HRESULT OneFunction(VOID *pSomeParameter)
{
CheckPointer(pSomeParameter, E_INVALIDARG)
}
BOOL AnotherFunction(VOID *pSomeParameter)
{
CheckPointer(pSomeParameter, FALSE)
}
Requirements
Header |
dshow.h |
Library |
Strmiids.lib |