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Problem Trapping Errors Using Excel VBA


I have an Excel sheet that uses VBA to open another sheet and read data from it every 5 minutes. The logic is essentially this:

On Error goto whatever
Open the other sheet
return success

whatever:
return failure

If success, reset the timer for 5 minutes.
If failure, reset the timer to try again in 30 seconds.

The reason we might not be able to open the sheet is because it is being written to periodically by another application. If we're trying to read when that's happening, we'll get an error.

This logic works fine if the other sheet we're trying to open is on a local drive. However, it needs to work with the other sheet on a network drive. The problem is, when we get a failure opening the sheet on a network drive, an Excel dialog box pops up displaying the error. (don't get this message when sheet is on a local drive) Our sheet/VBA is essentially locked up until somebody presses "OK" to close that dialog box.

Is there some error handling setting I can change to get around this problem?

I'm running Excel from Office 2007, and XP Pro.




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I'm buildning an ASP app that retrives data from an access database. I'm using ado to retrive the data.

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i have a form which has a button that opens a second form. this second form has an MS Agent control which basically runs a speech
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thanks.

rod

Trapping Errors?
Greetings everyone.

My situation:
I am in the design stage of building an app that I plan to use both MS Access and SQL MSDE with. I would like to build it in the best way to prevent data loss. I plan to use a central SQL database to store all data. The clients will be running a VB app that can read and write data from the central SQL database. If by chance the network connection goes down or the server gets restarted, I would like the app to be able to keep running, just writing the data to an Access database on the local C: drive instead. The user just gets an alert that the connection to the SQL server has been lost. They can continue to work though. When the link comes back up, the data in the access database can be synchronized to the SQL server. This synchronization can be initiated by the user.


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2: Say the user is writing data to SQL and the network connection drops in the middle of it. Some data has already been sent to SQL, but not all of it. Does SQL write what it has already gotten or drop it all since the connection hasn't been completed? Can I trap this with an err.number?

3: Are there any other suggestions to make this simple, faster, or easier?

Thanks,
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Trapping Untrappable Errors?
I have data in a number of worksheets in a book. However I want to remove empty lines, which some users insert. The following code sometimes work, but often I get a message box with err.number = 1004 and err.description = "No cells returned" (or something to that nature). the error occurs in the code when the .specialcells(xlCellsTypeConstant).count = 0.
I can not trap the error. This error number is not trappable according to the trappable error help page. Is there anyway to trap the error any way. (similay to the try-catch functions in C++)?

The code is attached as text. How do I make it appear in those nice grey text boxes many of you use?


Thanks

Trapping Provider Errors
From my readings, I have found that you can find Provider errors through the connection.errors collection. Is there an event that tells you that new errors have appeared in the errors collection, b/c from what I've read, ADO does not raise an error when a Provider error occurs. Therefore one cannot use the "On Error" clause.

Do I have to check the connection.errors.count value after every ADO command to see what's happening on the server end?

Ty

Trapping ActiveX Errors
I get run-time error 429 when I try to Set a non existing Excel.Application as myApp.
On Error seem doesen't work, what does?


Code:
On Error Resume Next
Set my= GetObject(, "Excel.Application")

Trapping Application Errors
ok guys,

I have some macros written in VB. The purpose of this macro can be easily understood by looking at the following code.


Code:
Sub main()

On Error GoTo Err_here

'Declare variables

'set variables

' connect to the application
' open a scheduled report
' do processing
' save or print results
' close report


Exit_Here:

'quit application
'release or free variables and set them to nothing
Exit Sub

Err_Here:
Open "C:ErrLogFile.txt" For Append As #1
Print #1, "Error occured while running " & strRpt & "."
Print #1, "Error #:" & Err & " " & Error$
Print #1, "Error occured at " & Now() & "."
Print #1, "********** End Of Error ***********"

Close #1
Resume Exit_Here
End Sub


what i am doing here is - connecting to my reports developer(cognos impromptu) application and running the desired report.

Now i want to do some error trapping and came up with the error handling code shown above. But this just traps any errors in the variable declarations or file path declaration, BUT DOES NOT TRAP APPLICATION ERRORS.

IF THERE IS AN APPLICATION ERROR OCCURS THEN I JUST SEE A MESSAGE BOX DESCRIBING THE ERROR, UNTIL I CLICK OK ON THIS MESSAGE BOX...all my other scheduled macros stop working. Once i click on...the scheduled macros start functioning again

IS THERE ANY WAY WE CAN WRITE A VB SUB ROUTINE WHICH BYPASSES THIS KIND OF MESSAGE BOXES GENERATED BY THE APPLICATION.

Thanks in advance

-DNG

Trapping RunTime Errors
I'm using VB to connect to an Access database that has validation rules. When invalid data is entered to the form and written to the DB a Run Time error is produced with the Validation Text from Access as the error message. Is there anyway to trap this message and present it in a more user-friendly manner, one which won't end the program?

(I was hoping to have a MsgBox containing the message and telling them to try again)

Trapping Inet Errors???!?!?
Hi!

Anyone know how to trap errors from the Inet control??

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In the object browser and in MSDN they say that incorrectpassword and incorrectusername is trapable errors...

Is this just an bug in the Inet control that one must live with or??


/Smirre

Trapping Runtime Errors.
OK, we all know how to trap errors:


Code:
Private Sub xyz

On Error Goto Hell

{Code}

Exit Sub

Hell:
Msgbox Err.Description

End Sub


Well, I am doing some stuff with the Drive List Box and Directory List Box controls. I've used them together so that the Directory List shows the contents of the selected drive in the Drive List Box:


Code:
Private Sub DriveListBox1_Change()

On Error GoTo EH

DirectoryListBox1.Path = DriveListBox1.Drive

Exit Sub

EH:
Msgbox ("Drive not available!")
DriveListBox1.Drive = Left(DirectoryListBox1.Path, 2)

End Sub


However, if I select a removable disk drive (eg floppy drive) from the drive box, that doesn't contain a disk, I get an error. Then, instead of going to the error handler (EH in the above example), the program stops running, and I get the following message box:

"Run-time error '68:
Device Unavailable"

...with the usual debug, end, etc... buttons. Very strange!

Is there a way to trap this error so that program can continue to run?

I would be really grateful if someone could help me, since this is the last hurdle before I can complete the application I am currently writing.

Thanks in advance,

Steve.

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Hi,

I have been getting some weird errors at client sites which somehow do not come up at testing time, no matter how much I try to simulate them, e.g. 'Type Mismatch' and 'Division by Zero' for starters. It is really embarrassing because the app just terminates in the client's face.

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Regards.

GoodGuy
Experience is a bad teacher for its exams precede its lessons.

Edited by - GoodGuy on 7/12/2005 11:34:13 PM

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VBA against Access 2000
A simple table in Access Test with two columns id (autonumber)
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In VBA I create a simple procedure

Sub InsertData()
  Dim dbs
    Set dbs = CurrentDb()
    Dim Base As String
    Dim str As String
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        + "Descript)" _
        + "VALUES ("
    str = Base
     str = str + """" + "" + """"
    str = str + ");"
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    dbs.Close
End Sub

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What kind of error mechanism can be used to trap this error and make it known that no insert was performed ?

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Can errors in printing be trapped in the Err object? For instance, I want to know whether the printer is powered on/off, is online/offline, or if it has paper or not. I'll be printing reports made in Crystal Reports, and I need to put a value in a Boolean variable: True if printing is successful; or False if any errors occured during the printing. My app's next process depends upon the value of this variable, so I need to get its real value. Does anyone know something about this?

Thanks in advance!

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How can I examine an error code from ODBC and Oracle
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if I use form_error, I can trap the error but dataerr gives me the code 7786 for different errors.

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Hi,

I'm using the Shell command to Map Network Drives, using NET USE. Is there any way to trap returned errors? For instance, if I'm disconnecting the network drive (Shell "Net Use E: /d") and the E: doesn't exist, in DOS the message 2250 is returned. Is there any way to get this message from the Shell command and display some relevant text to the User?

Cheers,
Maybe this question has been answered before, I've tried searching but haven't come up with anything so far

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I have a spreadsheet that calculates all the inputted values and uses VBA to insert some of it into a database (Ingres DB). As I didn't write the VBA code it is very confusing as there is a lot of it and the comments are in Swedish!

Anyway, when I run it against the database it returns the less than useful ODBC-call failed error. Now I know that it is just returning the first error in the list so I know I can loop through the errors with this code:


Code:
Err_Handler:

Dim errOdbc As Error
Dim ErrorVal As String

If DBEngine.Errors.Count > 1 Then
For Each errOdbc In DBEngine.Errors
With errOdbc
ErrorVal = .Number & " " & .Description & " " & .Source
MsgBox ErrorVal
End With
Next
End If

Problem is I keep getting a type mismatch error on the For Each line and I cannot figure out why! Unless I am missing something fairly obvious (likely) I just cannot see it!

Anyone know why I am getting Type Mismatch on that line?

(SOLVED)Trapping Errors In A Loop...
Hi guys... I have a simple question to you...

I have the following code:


VB Code:
For x= 1 To Combo.ListCount - 2    On Error GoTo ErrSec    If Not NotErrcnxBTE Then       Set DataBTE = New ADODB.Connection     Else       DataBTE.Close       NotErrcnxBTE = False    End If    Path2 = GetDBPath(Combo.List(x))    DataBTE.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" & _                 "Data Source=" + Path2 + ";"      DataBTE.Open    NotErrcnxBTE = True    CompDBErrSec:    Select Case Err.Number  ' Evaluate error number.       Case -2147467259               FGRacklist.TextMatrix(UsedRows, 0) = Combo.List(x)             FGRacklist.TextMatrix(UsedRows, 1) = "No Se Pudo Conectar"       Case -2147217843              FGRacklist.TextMatrix(UsedRows, 0) = ComBTE(0).List(Btecount)             FGRacklist.TextMatrix(UsedRows, 1) = "Falló Autentificación"       Case Is <> 0             MsgBox Err.Description + CStr(Err.Number), vbCritical, "Error En Form Load"    End Select    Err.ClearNext x

The problem I have is that I'm able to trap the first error... but if I get another error this one raise the 'normal' run-time error instead of getting trapped...

So, I'm wondering if there is something I can do to trap all the errors...

Tnx!

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I develop a three tiers application in VB6, client-server architecture.
The User interface tier is a VB6 EXE project. The Business tier is a VB6 Active X COM project (DLL) that has some classes.
The data are introduced by a VB form of User interface tier, but is validated in Business tier’s property functions.
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My problem is:
How can Business object tier procedure to tell User interface tier procedure that there are an error (and it have to retry the data input).
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Object.member=value‘call the property function of member of object.
‘The property contains err.Raise
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Exit sub
Err:
Msgbox “I was interrupted by an error”
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I see “is ok”.
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I am trying to ensure that when an rs or a db are opened, they are always closed. I am trapping errors; the problem is that in some routines, the error can occur while a db or rs is open or not! In my error handling bit, I am including the following code:

Code:
HandleIt:
    rs.Close
    db.Close
    Set rs = Nothing
    Set db = Nothing
MsgBox "There was an error checking the entries. Please try again." _
& vbCrLf & "Error Number: " & Err.Number & vbCrLf & "Desc: " _
& Err.Description, vbCritical, "Error In GetEntries()"


I want to ensure that if an rs and db were opened, they are closed. Unfortunately, if an error occurs before an rs or db are opened, I get another error when entering the handler code. I tried using

Code:
HandleIt:
if not rs = nothing then
    rs.Close
    db.Close
    Set rs = Nothing
    Set db = Nothing
else
   'do nothing
end if
MsgBox "There was an error checking the entries. Please try again." _
& vbCrLf & "Error Number: " & Err.Number & vbCrLf & "Desc: " _
& Err.Description, vbCritical, "Error In GetEntries()"

Bit it tells me that this is an invalid use of property.

How can I test if an rs or a db are open or set to nothing, so that I can better handle errors?

I sincerely appreciate any help you are able to give.



 

Disabling Or Trapping Short Cut Keys In Excel
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Hi all,

I know this is not strictly VB, but thought someone out there might be able
to help.

I am trying to "protect" the text in certain cells in an Excel spreadsheet.
I hear everyone screaming "Lock the cell and protect the sheet". However I
want the users to be able to insert rows and columns etc. and as far as I
can see, locking cells and protecting the sheet also disables this ability
for users.
I have therefore started to look at what events I can trap.
Just for now I have put a msgbox statement in each of the following events
to check when each fire. Problem is for some reason when I update the
spreadsheet, NONE of them seem to fire (!?!).
ThisWorkbook sheet Workbook_SheetChange event
ThisWorkbook sheet Workbook_SheetSelectionChange event
Sheet11 (the one I'm working on), Worksheet_Change event
Sheet11, Worksheet_SelectionChange event

I get the feeling I can't see the wood for the trees. Does anyone have any
suggestions...?

Thanks.

Regards

James W. Farquhar

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EXCEL.exe has generated errors and will be closed by windows.
You will need to restart the program.

An error log is being created.

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What actually happens prior to this is the application using VB to open Excel and then open the Excel Spreadsheet. That all works fine but I can't make any of the cells active by clicking on them. If I touch the Scroll Bar or try to change to a different sheet within the spread sheet I get this error and have to restart Excel.

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I can open an Excel file no problem.
I can activate a specific tab in the Excel file no problem.

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Thanks

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Dear all.

A user is using macro's and they work fine on one particular system.
Now the user is migrationg to another system (from W2K > XP, from excel 9.0.2720 to 10...sp3)
and the macros's wont run anymore.

When we look at the debugger we see that most macro's go into an error when functions like CurrentYear, counter are called.
We receive an message that says: "Compile error: Can't find project or library"

So it's obvious we're missing something but we are too newbie to know what.

Please HELP

BTW: as the error error occurs between OS's and excel version of the same version we know that there is something extra installed on this piece of hardware during the time but we don't know what.


EXMAPLE1
Sub Sales_Benelux()

'
'
CurrentYear = Worksheets("Data").Cells(11, 9)
CY = ">=" & CurrentYear
Sheets("Reken2").Select
Columns("C:N").Select
Selection.ClearContents
Sheets("reken").Select
Selection.AutoFilter Field:
>>>>>etc

EXAMPLE 2

'
'
'

Sheets("forecast").Select
Range("A2:G1000").Select
Selection.ClearContents
For Counter = 3 To 10
Set Name = Worksheets("Data").Cells(Counter, 1)
Set CurrentMonth = Worksheets("Data").Cells(8, 9)
Set PreviousMonth = Wor
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Excel.exe Has Generated Errors
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I was running my VB program opens multi tab sheets and convert into one sheet and finally save as csv file.

All files are generated sucessfully, But after processing every file it gives program error with below messgae

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For source code please see my attachment.

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I am getting multiple error messages from a fairly extensive Excel VBA application developed under Excel 2000 (on Windows 2000) when it's run on Excel 2002 (on XP).

Error messages include Run-time Error 1004 when trying to run the code:

Sheets("all_mine").Range("J1:J2").Interior.ColorIndex = x1None

I'm told there are other errors too.

Where can I find a list of the non-backwards compatibility of Excel 2002 VBA functions? (I don't have XP myself - other users do).

Any ideas?

Help With SQL To Excel Export File Saving Errors
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Then, the routine opens objects and connections for ADO SQL, gets the recordset, and then opens objects for Excel automation. Then it writes the contents of the recordset row by row to the excel sheet. All fine and dandy. However, problems start happening at the code line that actually saves the file when exporting is finished.

The first error I had occurs when the user chooses a filename that already exists AND that file is currently open. It would cause a run-time error '1004' Cannot Access file. So I added the 'On Error goto OpenFileError' handler that displays a message to close the file, then click OK, and it would resume at the save file line again.

So the user closes the file and the line doesnt cause an error the second time through, but an Excel prompt comes up: 'File already exists. Would you like to overwrite?' with 'Yes, No, or Cancel' buttons. Also, this excel prompt is displayed when the user selects an exisiting filename and the file IS NOT currently open.

Now, the routine works with desired reuslts when the user chooses the 'Yes' overwrite button, but selecting 'No' or 'Cancel' causes the Excel prompt to go away and then first message 'File in use, close the Excel file, and click OK' reappears. The file isnt really open this time, the program is just interpretting this MS Excel Conflict Resolution dialog as another error(I think), so it jumps to the error handling code again. So an endless loop will occur unless the user chooses to overwrite.

So, is there a way using the Save Common Dialog box upon the user choosing a path and filename to check if the file already exists, and prompts the user to overwrite at that moment, before passing the filename to the export routine? Then i could set the xlapp.Workbooks.SaveAs code to 'always overwrite', thus getting rid of having excel worry about this conflict, thus removing this second error prompt(which i cant find a way to address through code). Any other suggestions to a better way of doin this are greatly appreciated.


Code:
'Button Code to save Master File
Private Sub buttonSaveMaster_Click()
Dim xlFileName As String
Dim SQL As String

diSave.DialogTitle = "Save"
diSave.Filter = "Excel Files (*.xls)|*.xls"
diSave.ShowSave

xlFileName = diSave.FileName

SQL = "select * from Master"
Call CreateSpreadsheetFromSQL(SQL, xlFileName)
End Sub


Code:
'Routine to Save Master File
Public Sub CreateSpreadsheetFromSQL(strSQL As String, FileToSave As String)
Dim xlApp As Object
Dim xlSheet As Object
Dim xlRng As Object
Dim rs As Object
Dim dbConn As ADODB.Connection
Dim stConn As String
Dim vntRecords As Variant
Dim vntRecordsTemp As Variant
Dim cntRows As Long, cntFields As Long

'Set up the recordset
Set dbConn = New ADODB.Connection
stConn = "[ADOCONNECTIONSTRING]"
dbConn.Open stConn
Set rs = CreateObject("ADODB.Recordset")
rs.Open strSQL, dbConn
vntRecords = rs.GetRows

'Set up the Excel objects
Set xlApp = CreateObject("Excel.Application")
xlApp.Workbooks.Add
Set xlSheet = xlApp.Workbooks(1).Worksheets(1)

'Fill in the spreadsheet
Lots of Excel automation code here...

Retry:
On Error GoTo OpenFileError

xlApp.Workbooks(1).SaveAs FileToSave, xlNormal '<---this is error line

xlApp.Quit
Set xlApp = Nothing

Set xlRng = Nothing
Set xlSheet = Nothing
If Not (rs Is Nothing) Then rs.Close
Set rs = Nothing

Exit Sub

OpenFileError:
MsgBox "File is currently open. Please close Excel before clicking OK.", vbExclamation, "Error"
Resume Retry
End Sub

Copy Paste Errors In VBA Excel Code&lt;==PLEASE HELP
I copy and paste 2 seperate times in my VBA code. I run my code and get this error message at the first PasteSpecial Instance: "PasteSpecial method of Range class failed" If I run it again the compiler stops at the second instance of my PasteSpecial code. Then if I run it a third time my code works fine. Then it continues again on the next time I run the code.

Do I have to free memory or something why do these errors seem to happen only once?

Check If Excel Sheet Has Errors In Cells
Hi All

Does anyone know the correct way to check if there is an error in an Excel worksheet?

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strValue = XLRange.Value

'Will work fine unless there's an error in the cell (e.g. #DIV/0!)
'where you'd get a Type Mismatch error




Could do On Error Resume Next before each line but I've got lots of them and I think it might make the code look messy.

Thanks

Tee

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Thanks in advance people

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http://www.ilovemypc.com/excel%20sendkeys%20working%20code.zip

I'm looking for help on how to control errors in my program & couple of other things.

This is a vb6 program I use at work. I had a friend mine write it since i'm a novice. Basically this program reads specifically formatted excel spreadsheets and sends data from them to an active window. Before sending the data, this program cross references an access database. The program is not very neat, but it does the job.
You could actually modify this to do other stuff too...

At the url above (or attached), you can see the code i'm using, along with a sample spreadsheet and database.

Anyhow....

First this program checks for an active window "Inventory Adjustment". If it's not found, it displays an error. I would like it to exit if it finds the error, instead it displays a run time error 91.

Then the program launches the form, in which you select the spreadsheet you want to work with and you must TYPE IN the sheet name. If the sheet name does not exist, there is a runtime error 9 "Subscript out of range". Actually I would like it to diplay a msg box then exit or loop back to the beginning. Also a problem with this ... if the sheet name is not found, excel.exe is still open even though the program errored out.

Another issue I have with this program: sometimes, I get a runtime error 5 - if I restart the program it's fine...not sure what's wrong here...

Since i'm asking... another issue is this:
I'm basically sending data blindly to a specific active window. I'm sending the data then how ever many enter keys I need to goto the next field. In the {Item} variable, there is a max of 15 characters. If the max characters is reached, I don't want to send the enter key. Well in the vb program it's truncating everything to 15 characters. This is ok for the {Item} variable, but the {To Job} variable has 16 characters on occasion. The {To Job} field has a max of 22 characters (which no job is that long). As the program stands now, if the {To Job} variable has exactly 15 characters, the enter key is not sent after the variable, when it should be. So basically I need to change the program from truncating everything to 15 characters to just look at the {item} variable....(if it's 15 characters, don't send the enter key after that variable.

If anyone can help with this, I would appreciate it.

Also, if you're interested... I have a different version of the code that allows you to select the starting/ending row and columns.
http://www.ilovemypc.com/excel%20sendkeys%20working%20code2.zip

Why the program was created:

I work for an electrical contractor company. We use a database program called "ComputerEase". The spreadsheets contain material codes and qty info (basically what type of material will go into a specific floorplan of a house). I needed this program because otherwise I would have to print and manually type all day long. Now I just run this program..... I use the program on some sheets over and over, I just change one variable that I imput into the form.






Edited by - cyberfreak-vegas on 5/7/2003 11:51:40 AM

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Public Sub Retrieve_CF(Range_Refresh As String)
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Retrieve_Err:
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End Sub

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