TCatIoOpen

The TCatIoOpen function opens a connection to the TwinCAT I/O Server. Before any I/O processing TCatIoOpen should be called.

LRESULT TCatIoOpen();

Parameters

None

Return Values

If the function fails, the return value is -1.

Remarks

TCatIoOpen allocates memory and necessary system resources

QuickInfo

For Windows NT:

• Windows NT Version: Requires version 4.0 or later.
• TwinCAT: Requires version 2.5 or later.
• Header: Declared in TCatIoApi.h.
• Import Library: Use TCatIoDrv.lib.

For Windows CE:

• Windows CE Version: Requires version 4.2 or later.
• Image Version: Requires version 1.90 or later.
• Header: Declared in TCatIoW32Api.h.
• Import Library: Use TCatIoDrvW32.lib.

See Also

TCatIoClose ()

Note the system requirements.