OpenAdu232ByProductId
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 ReadAdu232, WriteAdu232 and CloseAdu232 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 OpenAdu232BySerialNumber instead of OpenAdu232ByProductId.
C Declaration:
void * __stdcall OpenAdu232ByProductId(int iProductId,
unsigned long iTimeout);
Visual Basic Declaration:
Declare Function OpenAdu232ByProductId Lib "AduHid.DLL" _
(ByVal iProductId As Long, _
ByVal iTimeout As Long) As Long
Arguments:
Any non-zero iTimeout value will enable timeout handling. The actual timeout period is
passed into the ReadAdu232 and WriteAdu232 function calls.