Creates a new wrapper object on a byte array object provided by the caller.
WINOLEAPI StgOpenAsyncDocFileOnIFillLockBytes(
  ILockBytes *pilb,   //Pointer to existing byte array object
  IFillLockBytes **ppflb
                      //Address of output variable that receives the 
                      // IFillLockBytes interface pointer
);
 This function supports the standard return values E_UNEXPECTED and E_FAIL, as well as the following:
The StgGetIFillLockBytesOnILockBytes function makes it possible to create an asynchronous storage wrapper object on a custom byte array object. For example, if you wanted to implement asynchronous storage on a database for which you have already created a byte array object, you would call this function to create the wrapper object for the byte array. To do so, the function creates a new wrapper object and then initializes it by passing it a pointer to the existing byte array object.
  Windows NT: Use version 4.0 or later.
  Windows: Use Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in objbase.h.
  Import Library: Included as a resource in ole32.dll.