|Microsoft DirectX 9.0|
The SetBumperLength method sets the interval between the time at which messages are placed in the port buffer and the time at which they begin to be processed by the port.
HRESULT SetBumperLength( DWORD dwMilliSeconds );
Buffer length, in milliseconds. The default value is 50.
The method returns S_OK.
Header: Declared in dmusici.h.