schrpc.idl: Add missing [string] attribute to an array of strings being returned by SchRpcEnumFolders/SchRpcEnumTasks.

widl: Correct the condition when to use new code path which avoids writing negative offsets in the pointer description.

user32: Make it possible to activate a window with parent and no WS_CHILD flag in WS_NCLBUTTONDOWN function.

This allows to differentiate strings and write appropriate rpc type
(FC_C_C[W]STRING instead of FC_[W]CHAR).

This allows to differentiate strings and write appropriate rpc type
(FC_C_C[W]STRING instead of FC_[W]CHAR).

This makes it much easier to determine what went wrong if an implementation
samples from the wrong location.