Echelon OpenLDV User Manual download pdf (Page 45)

OpenLDV Programmer’s Guide 37

Parameter Direction Description

tag Input Correlates notification messages with sessions. This tag is

supplied as the LPARAM parameter of all session state

change messages.

Remarks

Use this function to register a Windows HWND object for receiving session

change notifications. This handle is the same as that passed to one of the open

functions (ldv_open(), ldv_open_cap(), or ldvx_open()).

ldvx_shutdown()

Call this function to cleanly shut down the OpenLDV driver before exiting your

application.

Syntax

LPCSTR LDVAPI ldvx_shutdown(

VOID

)

Remarks

Call this function once before allowing the application to exit to avoid delays on

shutdown. After you call this function, you cannot access the OpenLDV driver

again.

Structures and Enumerations for the Device API

This section describes the structures and enumerations defined for the OpenLDV

device API.

LDVDeviceInfo Structure

The device API functions refer to the LDVDeviceInfo structured data type:

typedef struct LDVDeviceInfo

{

DWORD size;

const LDVDriverInfo* driver;

LPCSTR name;

LPCSTR physName;

LPCSTR desc;

LDVDeviceCaps caps;

LDVDeviceCaps capsMask;

BYTE transId;

LDVDriverID driverId;

} LDVDeviceInfo;

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Echelon OpenLDV User Manual Page 45