The D3DEXECUTEDATA structure specifies data for the IDirect3DDevice::Execute method. When this method is called and the transformation has been done, the instruction list starting at the value specified in the dwInstructionOffset member is parsed and rendered.
typedef struct _D3DEXECUTEDATA { 
    DWORD     dwSize; 
    DWORD     dwVertexOffset; 
    DWORD     dwVertexCount; 
    DWORD     dwInstructionOffset; 
    DWORD     dwInstructionLength; 
    DWORD     dwHVertexOffset; 
    D3DSTATUS dsStatus; 
} D3DEXECUTEDATA, *LPD3DEXECUTEDATA; 
   Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in d3dtypes.h.