Format Sint32 BPL_SetStart (Sint32 bstmid)
Input bstmid: Branch stream identifier (BPL_BR_NONE: Cancel branch playback)
No output
Function value Error code
Function Specifies the playback start stream (scenario start branch stream).
If BPL_BR_NONE is specified for the branch stream identifier, branch playback is canceled. 

Format Sint32 BPL_ExecServer (Bool chgsw)
Input chgsw: Branch execution switch (ON: Branch processing, OFF: No)
Function value Branch playback state
Function Runs a branch playback server. If the branch execution switch is ON, branch processing (branch stream
(Switching process of the screen).
(1) Branch playback state 

Constant Name	Description
BPL_SVR_COMPLETED	End branch playback
BPL_SVR_WAITSEL	Waiting for branch destination selection
BPL_SVR_SELECT	Destination decision
BPL_SVR_NOBRN	No branch destination

 For branch playback status, refer to “3.3 Branch playback status transition”. 

Format Sint32 BPL_SelectBranch (Sint32 brno)
Input brno: branch number
No output
Function value Error code
Function Selects the branch destination according to the specified branch number.
Remarks (a) If the branch execution switch is ON when BPL_ExecServer is executed, the branch process is actually executed.
It makes sense. (The selected branch destination switches to the current stream.)
(B) It is necessary to select the branch destination even if there is only one branch candidate.