Error 0x00040300

Value: 262912 | 0x00040300 | 262912

What does it mean ?

TF_S_ASYNC  
The data will be obtained asynchronously.
Value: 768 | 0x0300 | 0b0000001100000000
TS_S_ASYNC  
Text Store: Document successfully received an asynchronous lock.
Value: 768 | 0x0300 | 0b0000001100000000

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

Other Errors for FACILITY_ITF