Announcement

**Don Dickinson** · 28 Jun 2001, 09:16 AM

Code:

Tcp Open Server Addr ipAddr& Port 400 As hSocket

where ipAddr& is a long integer representing the dot noted ip address.

Best Regards,
Don

[This message has been edited by Don Dickinson (edited June 28, 2001).]

**Nathan Evans** · 28 Jun 2001, 09:21 AM

It just pauses the program.
It's based off a sample from the helpfile. I click the button,
and the program pauses.

It stops responding, and win2k automatically kills it.

What could be wrong?

Thanks.

Code:

#COMPILE EXE
#INCLUDE "DDT.INC"

$SERVER = ""
%PORTNUM=400

CALLBACK FUNCTION Go()

  LOCAL hSocket AS LONG
  LOCAL buffer  AS STRING

  hSocket = FREEFILE
  TCP OPEN SERVER PORT %PORTNUM AS hSocket
  IF ERR THEN
    MSGBOX "OPEN Error" & STR$(ERR)
    EXIT FUNCTION
  END IF

  CONTROL GET TEXT CBHNDL, 100 TO buffer

  IF LEN(buffer) = 0 THEN
    TCP SEND #hSocket, "Hello from PB/DLL v6.0!"
  ELSE
    TCP SEND #hSocket, buffer
  END IF

  TCP RECV #hSocket, 1024, buffer
  IF ERR THEN

    MSGBOX "RECV Error" & STR$(ERR)
    CLOSE #hSocket
    EXIT FUNCTION
  END IF

  CLOSE #hSocket

  MSGBOX buffer,, "Result"

END FUNCTION

FUNCTION PBMAIN() AS LONG

  LOCAL hDlg    AS LONG

  DIALOG NEW 0, "ECHO Client", ,, 115, 75, %DS_DDT_DEFAULT _
         OR %WS_SYSMENU TO hDlg

  CONTROL ADD LABEL, hDlg, -1, "Enter text", 5, 5, 100, 10
  CONTROL ADD TEXTBOX, hDlg&, 100, "", 5, 20, 102, 12
  CONTROL ADD BUTTON, hDlg&, 1, "Go", 35, 40, 40, 12 CALL Go

  DIALOG SHOW MODAL hDlg&

END FUNCTION

[This message has been edited by Nathan Evans (edited June 29, 2001).]

**Nathan Evans** · 29 Jun 2001, 05:59 AM

Any one have some PB/DLL 6 example source for a simple TCP Server?

Thanks.

-Nath.

**Don Dickinson** · 29 Jun 2001, 06:15 AM

Yes, there is one on my code page at http://dickinson.basicguru.com - it's a remote binary file server.

Best Regards,
Don

------------------
dickinson.basicguru.com

**Nathan Evans** · 29 Jun 2001, 10:17 AM

Thanks.

I'm not very good with winsock API...

Is it essential to create a Window for winsock?

**Don Dickinson** · 29 Jun 2001, 12:17 PM

For client stuff, no ... but for server stuff, i think so - otherwise how do you handle the receive notifications? In pure winsock (not the PB abstraction, this might not be the case).

--Don

------------------
dickinson.basicguru.com

**Nathan Evans** · 29 Jun 2001, 01:09 PM

Ok i've got the code together. It's a bit scrappy at the moment :P

I'm still getting used to the PB code editor, and infact the new language oddities

Thanks for your help with this topic.

Code:

#COMPILE EXE
#DIM ALL

#INCLUDE "WIN32API.INC"
#INCLUDE "WSCONST.INC"
#INCLUDE "RSERVER.INC"

GLOBAL gDlgMain AS LONG
GLOBAL hSock     AS LONG
GLOBAL gSock AS LONG
%TCP_CONNECT = %WM_USER + 4093
%lblStatus  = 801

CALLBACK FUNCTION DlgProc

   DIM sInBuffer AS STRING

   SELECT CASE CBMSG

        CASE %WM_INITDIALOG

         hSock = FREEFILE
         TCP OPEN SERVER PORT 400 AS hSock
            IF ERR THEN
               MSGBOX "Couldn't create socket."
            ELSE
               TCP NOTIFY hSock, Accept TO gDlgMain AS %TCP_CONNECT
               MSGBOX "Connected to Port " & STR$(400)
            END IF
         FUNCTION = 1


'CONTROL SET TEXT gDlgMain, %lblStatus, FORMAT$(CBCTLMSG)

      CASE %TCP_CONNECT

        SELECT CASE LOWRD(CBLPARAM)
     
        CASE %FD_ACCEPT
         'MSGBOX "accepted"
         TCP Accept hSock AS gSock
         TCP NOTIFY gSock, RECV CLOSE TO gDlgMain AS %TCP_CONNECT
'         TCP NOTIFY gSock, CLOSE TO gDlgMain AS %TCP_CONNECT
         'MSGBOX "Connected.."
         'TCP SEND hSock, "Welcome.."


        CASE %FD_READ
         TCP RECV gSock, 2 , sInBuffer
         MSGBOX sInBuffer


        CASE %FD_CLOSE
         TCP CLOSE gSock
         'MSGBOX "Closed by remote.."

        END SELECT

        CASE %WM_DESTROY
         TCP CLOSE gSock


        CASE ELSE
         CONTROL SET TEXT gDlgMain, %lblStatus, "Socket event received - %TCP_CONNECT LOWRD(lparam) =" + STR$(LOWRD(CBLPARAM))
   END SELECT

END FUNCTION


FUNCTION PBMAIN AS LONG

    DIALOG NEW 0, "simple tcp",,, 200, 200, %WS_MINIMIZEBOX OR %WS_CAPTION OR %WS_SYSMENU, 0 TO gDlgMain
    CONTROL ADD LABEL, gDlgMain, %lblStatus, "[Ready]", 1, 1, 120, 40, %SS_RIGHT

    DIALOG SHOW MODAL gDlgMain CALL DlgProc

    'TCP CLOSE hSock

    'CLOSE

END FUNCTION

[This message has been edited by Nathan Evans (edited June 29, 2001).]

**Nathan Evans** · 29 Jun 2001, 04:33 PM

I'm having a new problem now

I'm using TCP as a form of IPC, so i can communicate with another program
we are developing in VB. This PB program (below) will be the basis of the
IPC server. As this is the backend of the VB program, it needs to be hidden
or atleast not visible in the taskbar nor have a visible form.

The winsock code is working okay.. but as soon as i add the 'NOT %WS_VISIBLE'
to the DIALOG NEW's flags - the TCP server partially stops working. It will
accept connections okay, but it won't Echo anymore. (

I've experimented with Modeless forms, but they seem to terminate immediately?

Suggestions?

Code:

#COMPILE EXE
#DIM ALL

#INCLUDE "WIN32API.INC"
#INCLUDE "WSCONST.INC"

GLOBAL gDlgMain AS LONG
GLOBAL hSock    AS LONG
GLOBAL gSock    AS LONG

%TCP_CONNECT = %WM_USER + 4093
%lblStatus  = 801
$msgTitle = "NC_IPC (TCP) Service"

CALLBACK FUNCTION DlgProc

   LOCAL sInBuffer AS STRING

   SELECT CASE CBMSG

      
      CASE %WM_INITDIALOG

         hSock = FREEFILE
         TCP OPEN SERVER PORT 400 AS hSock TIMEOUT 90
            IF ERR THEN
               MSGBOX "Couldn't create socket.",, $msgTitle
            ELSE
               TCP NOTIFY hSock, Accept TO gDlgMain AS %TCP_CONNECT
               MSGBOX "Connected to Port " & STR$(400),,$msgTitle
            END IF
         FUNCTION = 1

      
         
      CASE %TCP_CONNECT

            SELECT CASE LOWRD(CBLPARAM)

                CASE %FD_ACCEPT
                TCP Accept hSock AS gSock
                 TCP NOTIFY gSock, RECV CLOSE TO gDlgMain AS %TCP_CONNECT
                 'TCP SEND hSock, "Welcome.."


                CASE %FD_READ
                TCP RECV gSock, 1024, sInBuffer
                 'MSGBOX sInBuffer
                 TCP SEND gSock, sInBuffer '"Welcome.."

                CASE %FD_CLOSE
                TCP CLOSE gSock

             END SELECT
             FUNCTION = 1

      CASE %WM_DESTROY
       
       TCP CLOSE gSock
       FUNCTION = 1
       
   END SELECT

END FUNCTION


FUNCTION PBMAIN AS LONG

    DIALOG NEW 0, "NC_IPC (TCP) Service",,, 200, 200, %WS_MINIMIZEBOX OR %WS_CAPTION OR %WS_SYSMENU OR NOT %WS_VISIBLE, 0 TO gDlgMain
    DIALOG SHOW MODAL gDlgMain CALL DlgProc
    DIALOG DOEVENTS
    
END FUNCTION

**Lance Edmonds** · 29 Jun 2001, 09:51 PM

Try removing the NOT %WS_VISIBLE flag in DIALOG NEW, and make the window hidden by calling DIALOG SHOW STATE CBHNDL, %SW_HIDE in %WM_INITDIALOG.

When using a modeless dialog, you have to use a message pump that runs for the duration of the dialog... your code does just one DIALOG DOEVENTS call and then immediately ends!

Basically, a message pump for a modeless dialog would look like this:

Code:

'pseudocode
DIALOG SHOW MODELESS hDlg,...
DO
  DIALOG DOEVENTS TO nCount&
LOOP WHILE nCOUNT&

For more information, please review the section in the help file on modeless dialogs.

------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

**Nathan Evans** · 30 Jun 2001, 01:21 AM

Lance,

I tried removing the OR NOT %WS_VISIBLE, and add
DIALOG SHOW STATE gDlgMain, %SW_HIDE to the %WM_INITDIALOG event.
This still left the dialog visible, however the TCP remained to work.

Next i tried setting the Dialog to MODELESS on the second line of my DDT code.
Then added the Doevents Loop code just after that - executed that, and the program
aborted immediately..

So i moved the Doevents Loop into the %WM_INITDIALOG in some desperate attempt,
but that failed too..

I'm feeling so dumb right now

- Nathan

[This message has been edited by Nathan Evans (edited June 30, 2001).]

**Clay Clear** · 30 Jun 2001, 01:57 AM

Nathan,

I *believe* that, when you use a MODELESS dialog that
uses DIALOG DOEVENTS, it's CRITICAL that you put

FUNCTION = 1

at the end of the %WM_INITDIALOG section in your DIALOG's
callback function. Doing so removed the same problem with
some of my code.

G'luck!

P.S. There were a couple of my programs where I had to put
that code at the end of EACH of the SELECT CASE CBMSG
blocks...I don't know why those particular codes required
that, whereas others didn't.

------------------
Clay C. Clear

http://www.v3space.com/a/a39/202/

[email protected]
[email protected]

**Nathan Evans** · 30 Jun 2001, 02:15 AM

Clay,

Thank you for your suggestion. It seems to have fixed it partly.
However, the program is only hidden from the screen, it is still visible
in the Taskbar. And the program constantly uses 100% CPU usage, because
of the Dialog Doevents Loop

Code:

#COMPILE EXE
#DIM ALL

#INCLUDE "WIN32API.INC"
#INCLUDE "WSCONST.INC"

GLOBAL gDlgMain AS LONG
GLOBAL hSock    AS LONG
GLOBAL gSock    AS LONG

%TCP_CONNECT = %WM_USER + 4093
%lblStatus  = 801
$msgTitle = "NC_IPC (TCP) Service"

CALLBACK FUNCTION DlgProc

   LOCAL sInBuffer AS STRING

   SELECT CASE CBMSG


      CASE %WM_INITDIALOG

        DIALOG SHOW STATE gDlgMain, %SW_HIDE

         hSock = FREEFILE
         TCP OPEN SERVER PORT 400 AS hSock TIMEOUT 90
            IF ERR THEN
               MSGBOX "Couldn't create socket.",, $msgTitle
            ELSE
               TCP NOTIFY hSock, Accept TO gDlgMain AS %TCP_CONNECT
               MSGBOX "Connected to Port " & STR$(400),,$msgTitle
            END IF
         FUNCTION = 1

      CASE %TCP_CONNECT

            SELECT CASE LOWRD(CBLPARAM)

                CASE %FD_ACCEPT
                TCP Accept hSock AS gSock
                 TCP NOTIFY gSock, RECV CLOSE TO gDlgMain AS %TCP_CONNECT

                CASE %FD_READ
                TCP RECV gSock, 1024, sInBuffer
                 'MSGBOX sInBuffer
                 TCP SEND gSock, sInBuffer '"Welcome.."

                CASE %FD_CLOSE
                TCP CLOSE gSock

             END SELECT
             FUNCTION = 1

      CASE %WM_DESTROY

       TCP CLOSE gSock
       FUNCTION = 1

   END SELECT
   FUNCTION = 1
   
END FUNCTION


FUNCTION PBMAIN AS LONG

    DIALOG NEW 0, "NC_IPC (TCP) Service",,, 200, 200, %WS_MINIMIZEBOX OR %WS_CAPTION OR %WS_SYSMENU, 0 TO gDlgMain
    DIALOG SHOW MODELESS gDlgMain CALL DlgProc
    'DIALOG DOEVENTS
    
    LOCAL nCount AS LONG
    DO
       DIALOG DOEVENTS TO nCount
    LOOP WHILE nCOUNT
    
END FUNCTION

I don't think a constantly running Loop is the way to go.. It is supposed
to be a Callback..

Thanks again,

-Nathan.

**Clay Clear** · 30 Jun 2001, 02:27 AM

Nathan,

When I want to hide my DIALOG, and I'm using a MODELESS one, I
use the following in my WINMAIN:

GLOBAL hInst AS LONG
GLOBAL DB AS LONG
GLOBAL Flag1 AS LONG
FUNCTION WINMAIN(BYVAL CurInst AS LONG, _
BYVAL PrvInst AS LONG, _
CmdLine AS ASCIIZ PTR, _
BYVAL CmdShow AS LONG) AS LONG

hInst = CurInst

DIALOG NEW 0, "",,,1,1,,TO DB
DIALOG SHOW MODELESS DB CALL Proc()
DIALOG SHOW STATE DB, 0
START:
IF ISFALSE Flag1 THEN
DIALOG DOEVENTS
ELSE
DIALOG END DB
EXIT FUNCTION
END IF
GOTO START
END FUNCTION

Note that you probably won't be getting any better CPU usage
ratings, BUT, the code works...for me, at least.

Note that, the Taskbar will VERY briefly flash with the dialog's
opening, but after that will be hidden.

Also note that Flag1 is nothing but what it says - a Flag. It is
set to TRUE when the user selects whatever option (in my
programs, it's the "Close" option in the System Tray's Popup
Menu) is designated by the program to kill the DIALOG, in the
DIALOG's CALLBACK FUNCTION.

Regards,

Clay

------------------
Clay C. Clear

http://www.v3space.com/a/a39/202/

[email protected]
[email protected]

**Nathan Evans** · 30 Jun 2001, 02:32 AM

I can't use Modeless dialogs at all if it excerts 100% cpu usage.

Do you know how to Hide a MODAL dialog completely? (taskbar and screen)

When run, I would prefer it not to flash on screen, then flash off - it looks bad.

Thanks,

-Nath.

------------------

**Clay Clear** · 30 Jun 2001, 02:40 AM

Nathan,

Sorry, can't help ya there. My own softwares are pretty much
designed to run in the System Tray, yet, based on the nominal
research I've done, it's impossible to have a System Tray icon
that responds to mouse clicks without having a Dialog. And, I
don't know of any way to create a Dialog that can be completely
hidden right away. there have been a number of posts on this BBS
regarding that issue - you might want to look them up and read
more about it from them.

P.S. Refer to the TRAY.BAS example also that ships with PB/DLL
6.0 - it enables you to hide a MODAL DIALOG so it just sits as
an icon in the Tray. But, even that code requires the DIALOG
to be initially displayed. However, it'll show you how to hide
a MODAL Dialog, once it's been displayed.

------------------
Clay C. Clear

http://www.v3space.com/a/a39/202/

[email protected]
[email protected]

**Nathan Evans** · 30 Jun 2001, 03:02 AM

Clay,

THANK YOU!! Tray.bas had just the thing!

If anyone interested: here's how i made my program run completely invisible,
and not even flash on the taskbar.

Thank you so much Clay!

Code:

#COMPILE EXE
#DIM ALL

#INCLUDE "WIN32API.INC"
#INCLUDE "WSCONST.INC"

GLOBAL gDlgMain AS LONG
GLOBAL hSock    AS LONG
GLOBAL gSock    AS LONG

%TCP_CONNECT = %WM_USER + 4093
%lblStatus  = 801
$msgTitle = "NC_IPC (TCP) Service"

CALLBACK FUNCTION DlgProc

   LOCAL sInBuffer AS STRING

   SELECT CASE CBMSG

    ShowWindow gDlgMain, %SW_HIDE

      CASE %WM_INITDIALOG

         hSock = FREEFILE
         TCP OPEN SERVER PORT 400 AS hSock TIMEOUT 90
            IF ERR THEN
               MSGBOX "Couldn't create socket.",, $msgTitle
            ELSE
               TCP NOTIFY hSock, Accept TO gDlgMain AS %TCP_CONNECT
               'MSGBOX "Connected to Port " & STR$(400),,$msgTitle
            END IF
         FUNCTION = 1

      CASE %TCP_CONNECT

            SELECT CASE LOWRD(CBLPARAM)

                CASE %FD_ACCEPT
                TCP Accept hSock AS gSock
                 TCP NOTIFY gSock, RECV CLOSE TO gDlgMain AS %TCP_CONNECT
                  FUNCTION = 1

                CASE %FD_READ
                TCP RECV gSock, 1024, sInBuffer
                 'MSGBOX sInBuffer
                 TCP SEND gSock, sInBuffer '"Welcome.."
                  FUNCTION = 1
                  
                CASE %FD_CLOSE
                TCP CLOSE gSock
                  FUNCTION = 1
                  
             END SELECT
             FUNCTION = 1

      CASE %WM_DESTROY

       TCP CLOSE gSock
       FUNCTION = 1

   END SELECT
  
END FUNCTION


FUNCTION PBMAIN AS LONG

    DIALOG NEW 0, "NC_IPC (TCP) Service",,, 200, 200, NOT %WS_VISIBLE, 0 TO gDlgMain
    DIALOG SHOW MODAL gDlgMain CALL DlgProc
    ShowWindow gDlgMain, %SW_HIDE
    
END FUNCTION

------------------

**Lance Edmonds** · 30 Jun 2001, 03:24 AM

Ummm... the ShowWindow call that is located in PBMAIN is not executed until your dialog is destroyed because the DIALOG SHOW MODEL statement is a "blocking" call...

However, your code now hides the window for every single message that is send thorough the callback... that is not efficient.

------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

**Nathan Evans** · 30 Jun 2001, 03:29 AM

Yeah i have since removed that line, as it is not required.

I was getting so frustrated, i just went Overkill in getting the darn thing to be invisible

The line that really does the job is:

Code:

CALLBACK FUNCTION DlgProc

   LOCAL sInBuffer AS STRING

   SELECT CASE CBMSG

    ShowWindow gDlgMain, %SW_HIDE
...

Thanks.

-Nath

**Nathan Evans** · 30 Jun 2001, 03:37 AM

Got another problem now..

Just realised that when i succesfully hide the dialog..

The TCP service stops responding, again..

Announcement

TCP OPEN error

TCP OPEN error

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