ADU  Series - USB Data Acquisition Interface SDK 

OpenAduStreamByProductId

This functions searches for any ADU device attached to the computer that matches the product id. The function opens the first ADU device that matches and passes back a handle to it.

The handle value must be retained by the calling program and used with all subsequent ReadAduStream and CloseAduStream function calls.

Note that "first" in this context does not necessarily reflect the order that the devices were plugged in. "First" means the first one encountered in the internal list maintained by the Windows operating system.

If more than 1 ADU device with the same product id is connected then use OpenAduStreamBySerialNumber instead of OpenAduStreamByProductId.

C Declaration:

void * __stdcall OpenAduStreamByProductId(int iProductId,
unsigned long iTimeout);

Visual Basic Declaration:

Declare Function OpenAduStreamByProductId Lib "AduHid.DLL" _
(ByVal iProductId As Long, _
ByVal iTimeout As Long) As Long

Arguments:

Argument Type Value Description
iProductId integer non 0 product id to search for
iTimeout unsigned long 0 timeouts disabled
other timeout processing enabled


Any non-zero iTimeout value will enable timeout handling. The actual timeout period is passed into the ReadAduStream function call.

Return Codes:

Value Description
INVALID_HANDLE_VALUE pipe was not opened
0 pipe was not opened
other Handle to the ADU stream pipe