The DeleteProps method deletes one or more properties.
|Windows Mobile Messaging implements this method only for IAttach and IMessage interface objects.|
This method returns the standard values E_INVALIDARG, E_OUTOFMEMORY, E_UNEXPECTED, and E_FAIL, as well as the following:
The caller has insufficient permissions to delete properties.
Not all properties were successfully deleted, but at least one property was successfully deleted.
The cValues member of the SPropTagArray pointed to by lpPropTagArray must not be zero.
You do not need to set the property type for each property tag in the property tag array pointed to by lpPropTagArray. Property types are ignored; only the property identifiers are used.
Some objects do not allow modification and return MAPI_E_NO_ACCESS from DeleteProps. Other objects allow some properties to be deleted but not others.
When DeleteProps is called from an IAttach interface object, the following additional conditions must be true or the call will fail:
lpPropTagArray->cValues == 1 lpPropTagArray->aulPropTag == PR_ATTACH_DATA_BIN