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4/8/2010

This macro determines if a given pointer is NULL. If the pointer is NULL, CheckPointerreturns a user-defined value.

Syntax 

CheckPointer(

p,

ret
);

Parameters

p

Pointer to check.

ret

Value your function will return if pis NULL.

Remarks

The following examples shows how to call this macro.

Copy Code 
HRESULT OneFunction(VOID *pSomeParameter)
{
	CheckPointer(pSomeParameter, E_INVALIDARG)
}
BOOL AnotherFunction(VOID *pSomeParameter)
{
	CheckPointer(pSomeParameter, FALSE)
}

Requirements

Windows Embedded CE Windows CE 2.12 and later
Windows Mobile Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for Windows Mobile Version 5.0 and later
Note Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements
For more information, see Setting Up the Build Environment,
Version 2.12 requires DXPAK 1.0 or later

See Also