 WriteAdu232
This function writes data to the ADU RS232 pipe. The number of bytes written is
returned in lpNumberOfBytesWritten.
The handle value must be the value returned by the open call.
ADU RS232 data blocks are limited to 40 characters in length.
C Declaration:
int __stdcall WriteAdu232(void * hDevice,
const void * lpBuffer,
unsigned long nNumberOfBytesToWrite,
unsigned long * lpNumberOfBytesWritten,
unsigned long iTimeout);
Visual Basic Declaration:
Declare Function WriteAdu232 Lib "AduHid.DLL" _
(ByVal aduHandle As Long, ByVal lpBuffer As String, _
ByVal lNumberOfBytesToWrite As Long, _
ByRef lBytesWritten As Long, ByVal iTimeout As Long) As Long
Arguments:
| Argument |
Type |
Value |
Description |
| hDevice |
void * |
value from open call |
handle to the device |
| lpBuffer |
const char * |
address of buffer |
buffer to be written |
| nNumberOfBytesToWrite |
unsigned long |
> 0 |
number of bytes to write |
| lpNumberOfBytesWritten |
unsigned long * |
|
number of bytes written |
| iTimeout |
unsigned long |
|
milli-seconds to wait |
A non-zero iTimeout value can only be supplied if timeout processing was activated during
the open call. (ie. a non-zero iTimeout value was passed into the open function)
Return Codes:
| Value |
Description |
| 0 |
call failed |
| other |
call succeeded |
Note: call GetLastError to get more information about a failed write operation. |