Creates a new moniker based on the common prefix that this moniker shares with
the specified moniker.
| IMoniker *pmkOther,
||//Moniker to be used for comparison
| IMoniker **ppmkPrefix
||//Receives the prefix
[in] Points to the moniker to be compared with this one for a common prefix.
[out] Receives a pointer to the moniker that is the common prefix of the this
moniker and pmkOther
. If an error occurs or if there is no common prefix, the implementation sets *ppmkPrefix
to NULL. If *ppmkPrefix
is non-NULL, the implementation must call IUnknown::AddRef
on the parameter; it is the caller's responsibility to call IUnknown::Release
A common prefix exists that is neither this moniker nor pmkOther
No common prefix exists.
The entire pmkOther
moniker is a prefix of this moniker.
The two monikers are identical.
This moniker is a prefix of the pmkOther
This method was called on a relative moniker. It is not meaningful to take the
common prefix on a relative moniker.
Indicates insufficient memory.
If, for example, you have one moniker that represents the path
"c:\projects\secret\art\pict1.bmp" and another moniker that represents the path
"c:\projects\secret\docs\chap1.txt." In that case, the common prefix of these two monikers
would be a moniker representing the path "c:\projects\secret."
Notes to Callers
method is primarily called by the implementation of the IMoniker::RelativePathTo
method. Moniker clients rarely need to call this method.
Note that it is not meaningful to take the common prefix on relative monikers.
Consequently, you should call this method only if pmkOther
and this moniker are both absolute monikers (where an absolute moniker is
either a file moniker or a generic composite whose left-most component is a file
moniker, and where the file moniker represents an absolute path). Do not call
this method on relative monikers.
Notes to Implementors
Your implementation should first determine whether pmkOther
is a moniker of a class that you recognize and for which you can provide
special handling (for example, if it is of the same class as this moniker). If so,
your implementation should determine the common prefix of the two monikers.
Otherwise, it should pass both monikers in a call to the MonikerCommonPrefixWith
API function, which correctly handles the generic case.
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