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**Chris Holbrook** · 11 Apr 2008, 06:33 AM

I know little about Excel, but one thing I do know is that if you wrap your code inside {code} and {/code} delimiters (use square braces not curly ones) it becomes much easier to read.

**Michael Mattias** · 11 Apr 2008, 08:23 AM

Your timerproc procedure has the wrong header.

For any other value of fuEvent, the lpTimeProc parameter is interpreted as a function pointer with the following signature: void (CALLBACK)(UINT uTimerID, UINT uMsg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2);

Since the timerproc is actually being called with five parameters pushed onto the stack, and you told pb there were no parameters , I'm surprised the negative results are limited to "bad data."

[ADDED]
"For your consideration," as might have been said by the late Rod Serling.... "a callback procedure with no parameters seems just a bit unusual.... except, perhaps, in TheTwilight Zone...."

MCM

**Sudarshan Sukhani** · 11 Apr 2008, 09:59 PM

EXCEL, Com & Timer issues resolved

Michael pointed out that my callback procedure declarations were incorrect. I corrected that, but the problem was not resolved. Finally, I removed the TimeSetEvent command and put in the SetTimer command. My timer now works, picking up data at required intervals from an excel spreadsheet. Here is the finished code. (I think the cancel button does not stop the timer, but I can always close the application).

Code:

#COMPILE EXE
#DIM ALL
#INCLUDE "WIN32API.INC"
#INCLUDE "ExcelApp.inc"

'------------------------------------------------------------------------------
' Equates
'------------------------------------------------------------------------------
$AppTitle = "Pickup Data Example"
%ID_TIMER = 105
%ID_CANCELTIMER = 110
%ID_END = 115

'------------------------------------------------------------------------------
' Callback Declarations
'------------------------------------------------------------------------------
DECLARE CALLBACK FUNCTION StartTimerCallBack()
DECLARE CALLBACK FUNCTION CancelTimerCallBack()
DECLARE CALLBACK FUNCTION EndCallBack()
DECLARE SUB TimerProc()
DECLARE FUNCTION T10 ( BYVAL uID AS LONG, BYVAL uMsg AS LONG, _
BYVAL dwUser AS LONG, BYVAL dw1 AS LONG, BYVAL dw2 AS LONG) AS LONG

GLOBAL htimer AS LONG
GLOBAL hDlg AS DWORD

FUNCTION PBMAIN () AS LONG

DIALOG NEW 0, $AppTitle, 77, 22, 300, 167, _
        %DS_CENTER OR %WS_CAPTION OR %WS_SYSMENU, 0 TO hDlg

    ' Abort if the dialog could not be created
    IF hDlg = 0 THEN EXIT FUNCTION  ' Error occurred

    DIALOG SET COLOR hDlg, -1&, RGB(255,255,222)

' Add the command buttons
    CONTROL ADD BUTTON,   hDlg, %ID_TIMER, "Start Timer",  10, 133,  60,  24 CALL StartTimerCallBack
    CONTROL ADD BUTTON,   hDlg, %ID_CANCELTIMER,   "Cancel Timer",  75, 133,  60,  24 CALL CancelTimerCallBack
    CONTROL ADD BUTTON,   hDlg, %ID_END,      "END",  155, 133,  60,  24 CALL EndCallBack

    ' Start up our GUI, and run until the user quits
    DIALOG SHOW MODAL hDlg

END FUNCTION

'------------------------------------------------------------------------------
' Main dialog callback
'------------------------------------------------------------------------------
CALLBACK FUNCTION StartTimerCallBack
LOCAL TimerEvent AS LONG

hTimer = SetTimer(hDlg, TimerEvent,3000,CODEPTR(T10))
END FUNCTION

CALLBACK FUNCTION CancelTimerCallBack
LOCAL result AS LONG
result = KillTimer(hDlg,hTimer)

END FUNCTION

CALLBACK FUNCTION EndCallBack

DIALOG END CBHNDL

END FUNCTION


SUB TimerProc()


LOCAL oExcelApp AS ExcelApplication
LOCAL oExcelWorkbook AS ExcelWorkbook
LOCAL oExcelWorkSheet AS ExcelWorkSheet
LOCAL vRange,vText,vVnt,vBool, vInFile, vInSheet AS VARIANT

LOCAL strProgramID AS STRING

REGISTER i AS LONG
LOCAL txtfilenum AS LONG

LOCAL aa AS DOUBLE

txtfilenum = FREEFILE
' file to which I wish to append the excel data
OPEN "april11.txt" FOR APPEND AS #txtfilenum

  strProgramID=PROGID$(CLSID$("Excel.Application"))
  SET oExcelApp = ExcelApplication IN strProgramID
  vBool = 1
  OBJECT LET oExcelApp.Visible = vBool

   '----------------------------------------------------------------
    ' Open workbook
    vInFile = "f:\mywork\pb_code\ddelink\dde1"

    OBJECT GET oExcelApp.ActiveWorkBook TO vVnt

    SET oExcelWorkbook = vVnt
    IF OBJRESULT OR ERR THEN
        MSGBOX "Excel could not open workbook."
        EXIT SUB
    END IF

    'I know the workbook & sheet names
    LET vInSheet = "Sample"
    OBJECT GET oExcelApp.ActiveSheet TO vVnt
    SET oExcelWorkSheet = vVnt

' pick up data from column B, rows 2 to 9
FOR I = 2 TO 9
      vRange="B" & TRIM$(STR$(i))

      OBJECT GET oExcelWorkSheet.Range(vRange).Value TO vText

      IF OBJRESULT OR ERR THEN
                  MSGBOX "Failed getting cell" + STR$(OBJRESULT) + "  ERR:" + STR$(ERR)

      END IF

aa = VARIANT#(vText)
PRINT #txtfilenum, aa

NEXT I

  'OBJECT CALL oExcelApp.Quit
  SET oExcelApp = NOTHING
  SET oExcelWorkbook = NOTHING
  SET oExcelWorkSheet = NOTHING

CLOSE #txtfilenum


END SUB

FUNCTION T10 ( BYVAL uID AS LONG, BYVAL uMsg AS LONG, _
BYVAL dwUser AS LONG, BYVAL dw1 AS LONG, BYVAL dw2 AS LONG) AS LONG

CALL TimerProc()

END FUNCTION

**José Roca** · 11 Apr 2008, 10:15 PM

TimeSetEvent runs in its own thread, so if you use it, you have to initialize the COM library with CoInitializeEx and uninitialize it with CoUninitialize for that thread.

**Michael Mattias** · 12 Apr 2008, 08:58 AM

TimeSetEvent runs in its own thread, so if you use it, you have to initialize the COM library with CoInitializeEx and uninitialize it with CoUninitialize for that thread.

I don't use much (OK, so I don't use any) COM so I don't know if this is a good idea or not....

Since the compiler already automatically initializes the COM library (using CoInitialize) for the primary thread, shouldn't it also automatically do so for each additional thread of execution launched?

Of course the problem here is not addressed, since the compiler can't possibly know about additional threads of execution launched by calls to external libraries (in this case the winapi).

But I wonder if CoInitialize is called automatically when a THREAD CREATE is executed?

If not, should it, to be consistent?

MCM

**Theo Gottwald** · 28 Jan 2009, 02:52 AM

But I wonder if CoInitialize is called automatically when a THREAD CREATE is executed?

As far as I have heared from Jose, its called automatically by PB for the Main Programm, but not for Threads.

**José Roca** · 28 Jan 2009, 05:39 AM

As far as I have heared from Jose, its called automatically by PB for the Main Programm, but not for Threads.

This was true for previous versions of the compilers. PBWIN 9.+ and PBCC 5-+ call CoInitialize/CoUninitialize for each thread.

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EXCEL COM & Timer

EXCEL COM & Timer

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