Operating system name and version: WinXP
Version of smsd: ?
Smsd installed from: ?
Name and model of a modem / phone: GPRS Modem
Interface: USB/RS232

Dear everyone,
I'm testing Sim toolkit app of GPRS modem by VB6. I meet problem when send Ctrl+Z
Have anyone know why?
This is source in VB6

Select Case STT Case 1 COM.Output = "AT" & vbCrLf Case 2 COM.Output = "AT+STIN?" & vbCrLf Case 3 COM.Output = "AT+STGI=0" & vbCrLf Case 4 COM.Output = "AT+STGR=0,1,129" & vbCrLf Case 5 COM.Output = "AT+STGI=3" & vbCrLf Case 6 COM.Output = "AT+STGR=3,1" & vbCrLf Case 7 [color=red]COM.Output = "290886" & Chr(26)[/color] Case 8 COM.Output = "AT+STGI=6" & vbCrLf Case 9 COM.Output = "AT+STGR=6,1,1" & vbCrLf End Select

And this is result AT command:

AT+CMEE=1 OK AT OK AT+STIN? +STIN: 99 OK AT+STGI=0 +STGI: "Viettel Smart" +STGI: 128,5,"BankPlus",0,33 +STGI: 129,5,"Thanh Toan Da Mang",0 +STGI: 130,5,"Ban hang",0 +STGI: 131,5,"XMKH - Gach no cuoc TBTS",0 +STGI: 132,5,"Buu chinh",0 OK AT+STGR=0,1,129 OK +STIN: 3 AT+STGI=3 +STGI: 0,0,6,6,0,"Input pass:" OK AT+STGR=3,1 [color=red]> 290886..[/color] [color=red]+CME ERROR: 4[/color] AT+STGI=6 +CME ERROR: 518

Please help me, thank you
P/S: I use Ctrl+Z to send SMS then ok, but can not use for sim toolkit service

Go to http://www.google.com.vn/ and search for send ctrl-z visual basic. Good answers are found .