11-02-2006
Windows Terminal Emulators
I have been using NetTerm on various Windows flavors for a while and have just run into a problem with printer passthru (transparent printing) that I can analyse but not resolve.
The setup is a Epson TM60 POS Label Printer connected XON/XOFF via COM1 on a Win98SE system. This is controlled utilising ESC/POS commands to produce barcodes.
The problem is that the ALL the NUL codes (ASCII 00) in the commands are dropped before they get to the printer ie:
*set printable area motion units in page mode
move x"1B570000000070019F00" to tm60-line
write tm60-line no control.
results in 1B5770019F at the sticky end of TCP/IP, Windows, NetTerm, printer.
NetTerm is configured to print direct to the port (not using the windows driver/spooler) so my query is - WHAT IS STEALING THE NULS ??? -
BTW If I hang the TM60 off a RS232 port on the Server there are no probs.
The problem is not hardware related - several printers, Win systems tested.
Any thoughts anyone???
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LEARN ABOUT OPENSOLARIS
tk_attachhwnd
HWND(3TK) Tk Library Procedures HWND(3TK)
__________________________________________________________________________________________________________________________________________________
NAME
Tk_GetHWND, Tk_AttachHWND - manage interactione between the Windows handle and an X window
SYNOPSIS
#include <tkPlatDecls.h>
HWND
Tk_GetHWND(window)
Window
Tk_AttachHWND(tkwin, hwnd)
ARGUMENTS
Window window (in) X token for window.
Tk_Window tkwin (in) Tk window for window.
HWND hwnd (in) Windows HWND for window.
_________________________________________________________________
DESCRIPTION
Tk_GetHWND returns the Windows HWND identifier for X Windows window given by window.
Tk_AttachHWND binds the Windows HWND identifier to the specified Tk_Window given by tkwin. It returns an X Windows window that encapsulates
the HWND.
KEYWORDS
identifier, window
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Availability | SUNWTk |
+--------------------+-----------------+
|Interface Stability | Uncommitted |
+--------------------+-----------------+
NOTES
Source for Tk is available on http://opensolaris.org.
Tk 8.0 HWND(3TK)