Microsoft KB Archive/177270

= How to create a Graph object on a PowerPoint 97 for Windows slide in Access 97 by using Visual Basic for Applications =

Article ID: 177270

Article Last Modified on 1/22/2007

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APPLIES TO


 * Microsoft Access 97 Standard Edition
 * Microsoft PowerPoint 97 Standard Edition

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This article was previously published under Q177270



SUMMARY
This article describes how to create a Microsoft Graph object on a Microsoft PowerPoint 97 for Windows slide in Microsoft Access 97 by using Microsoft Visual Basic for Applications.

This article assumes that you are familiar with Visual Basic for Applications and with creating Access 97 applications by using the programming tools that are provided with Access 97. For additional information about Visual Basic for Applications, see the "Building Applications with Microsoft Access 97" manual.

Note A demonstration of the technique that is used in this article can be seen in the sample file that is named Grphsm97.exe.

For additional information about how to obtain this file, click the following article number to view the article in the Microsoft Knowledge Base:

186855 Microsoft Access 97 sample graphs available in Download Center



MORE INFORMATION
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements. To create a Microsoft Graph version 8.0 object on a Microsoft PowerPoint 97 slide, follow these steps:

CAUTION: Following the steps in this example will modify the sample database Northwind.mdb. You may want to back up the Northwind.mdb file and perform these steps on a copy of the database.  Open the sample database Northwind.mdb.  Create a module and type the following line in the Declarations section, if it is not already there: Option Explicit   Type the following procedures: Function CreateGraphFromFile(CGFF_PPTFileName As String, _      CGFF_Tablename As String, CGFF_SavedPPT As String) As Boolean

'**********************************************************************   'Function:  CreateGraphFromFile 'Purpose:  Create a graph on a PowerPoint Slide using a Microsoft '          Access table. '   'Arguments: CGFF_PPTFilename - name of the new PowerPoint presentation '          file that you want to create. You must include the file '          name and path. '   '           CGFF_Tablename- name of the Microsoft Access table or query '   '           CGFF_SavedPPT - name of a previously saved PowerPoint '          presentation with a graph object already on it. An   '           empty string ("") if you want to use a blank presentation '   '    'Returns:  True if successful or False if not. '   '****************************************************************

On Error GoTo ERR_CGFF Dim oDataSheet As Object Dim shpGraph As Object, Shpcnt As Integer, FndGraph As Boolean Dim lRowCnt, lColCnt, lValue As Long, CGFF_FldCnt As Integer Dim OPwrPnt As Object, OpwrPresent As Object Dim CGFF_DB As Database, CGFF_TD As TableDef, CGFF_Rs As Recordset Dim CGFF_field As Field, CGFF_PwrPntloaded As Boolean Dim lheight, lwidth, LLeft, lTop As Single

' See if the CGFF Table already exists. If IsTableQuery("", CGFF_Tablename) Then Set CGFF_DB = CurrentDb Set CGFF_Rs = CGFF_DB.OpenRecordset(CGFF_Tablename, dbOpenSnapshot) On Error GoTo ERR_CGFF

' Set up the object references. On Error GoTo Err_CGFFOle CGFF_PwrPntloaded = False Set OPwrPnt = CreateObject("Powerpoint.application")

' Activate PowerPoint. If you do not want to see PowerPoint, remark the ' next line out. OPwrPnt.Activate CGFF_PwrPntloaded = True

' Use this line to Open a default saved presentation ' Set OpwrPresent = OPwrPnt.Presentations.Open(DefFileName).Slides(1)

If CGFF_SavedPPT = "" Then

' Use these lines to create a new Graph object on the slide. Set OpwrPresent = OPwrPnt.Presentations.Add.Slides.Add(1, 12) lheight = OPwrPnt.ActivePresentation.PageSetup.SlideHeight / 2 lwidth = OPwrPnt.ActivePresentation.PageSetup.SlideWidth / 2 LLeft = OPwrPnt.ActivePresentation.PageSetup.SlideHeight / 4 lTop = OPwrPnt.ActivePresentation.PageSetup.SlideHeight / 4 Set shpGraph = OpwrPresent.Shapes.AddOLEObject(Left:=LLeft, _      Top:=lTop, Width:=lwidth, Height:=lheight, _       ClassName:="MSGraph.Chart", Link:=0).OLEFormat.Object FndGraph = True Else

' Use these lines if you already have a saved chart on a PowerPoint ' slide. Set OpwrPresent = OPwrPnt.Presentations.Open(CGFF_SavedPPT).Slides(1) FndGraph = False For Shpcnt = 1 To OpwrPresent.Shapes.Count

' Check if shape is an OLE object. If OpwrPresent.Shapes(Shpcnt).Type = 7 Then

' Check if OLE object is graph 8 object. The ProgID is   ' case sensitive. If OpwrPresent.Shapes(Shpcnt).OLEFormat.ProgID = "MSGraph.Chart.8" _ Then Set shpGraph = OpwrPresent.Shapes(Shpcnt).OLEFormat.Object

' Found the graph. FndGraph = True End If       End If           Next Shpcnt

' If a graph was found. End If   On Error GoTo ERR_CGFF If FndGraph Then

' Set the reference to the datasheet collection. Set oDataSheet = shpGraph.Application.DataSheet

' Clear the datasheet. oDataSheet.Cells.Clear

' These are the lines to set up you row headings You can make this ' anything you want. CGFF_FldCnt = 1

' Loop through the fields collection and get the field names. For Each CGFF_field In CGFF_Rs.Fields oDataSheet.Cells(CGFF_FldCnt, 1).Value = _ CGFF_Rs.Fields(CGFF_FldCnt - 1).Name CGFF_FldCnt = CGFF_FldCnt + 1 Next CGFF_field lRowCnt = 1

' Loop through the recordset. Do While Not CGFF_Rs.EOF CGFF_FldCnt = 1

' Put the values for the fields in the datasheet. For Each CGFF_field In CGFF_Rs.Fields oDataSheet.Cells(CGFF_FldCnt, lRowCnt + 1).Value = _ CGFF_Rs.Fields(CGFF_FldCnt - 1).Value CGFF_FldCnt = CGFF_FldCnt + 1 Next CGFF_field lRowCnt = lRowCnt + 1 CGFF_Rs.MoveNext Loop

' Update the graph. shpGraph.Application.Update DoEvents CGFF_Rs.Close CGFF_DB.Close

' Release the references and save the slide. OPwrPnt.ActivePresentation.SaveAs (CGFF_PPTFileName) DoEvents OPwrPnt.Quit CreateGraphFromFile = True GoTo Exit_CGFF Else  ' No graphs were found display an error. MsgBox "No graph objects were found on the Activepresentation", _ vbOKOnly, "No Graphs!!!" OPwrPnt.Quit CreateGraphFromFile = False GoTo Exit_CGFF End If       Else

' No table was found. MsgBox "There is not a recordset named " & CGFF_Tablename & _ "In this database", vbOKOnly, "No Table!!!" CreateGraphFromFile = False Exit Function End If

Err_CGFFOle: ' OLE error section when trying to communicate with PowerPoint. MsgBox "There was a problem Communicating with PowerPoint", vbOKOnly, _ "No data file!!!" MsgBox Err & " " & Err.Description, vbOKOnly, "Data file problem!!!" CreateGraphFromFile = False If CGFF_PwrPntloaded Then OPwrPnt.Quit End If   GoTo Exit_CGFF

ERR_CGFF: ' General error section. MsgBox Err & " " & Err.Description, vbOKOnly, _ "An Error has occurred with this application" CreateGraphFromFile = False

Exit_CGFF: Set oDataSheet = Nothing Set OPwrPnt = Nothing Set OpwrPresent = Nothing Set shpGraph = Nothing

End Function

'********************************************************   ' FUNCTION: IsTableQuery '   ' PURPOSE: Determine if a table or query exists. '   ' ARGUMENTS: '  DbName: The name of the database. If the database name '          is "" the current database is used. '   TName: The name of a table or query. '   ' RETURNS: True (it exists) or False (it does not exist). '   '********************************************************

Function IsTableQuery(DbName As String, TName As String) As Integer Dim Db As Database, Found As Integer, Test As String

Const NAME_NOT_IN_COLLECTION = 3265

' Assume the table or query does not exist. Found = False

' Trap for any errors. On Error Resume Next

' If the database name is empty... If Trim$(DbName) = "" Then

'...then set Db to the current Db. Set Db = CurrentDb Else 'Otherwise, set Db to the specified open database. Set Db = DBEngine.Workspaces(0).OpenDatabase(DbName)

'See if an error occurred. If Err Then MsgBox "Could not find database to open: " & DbName IsTableQuery = False Exit Function

End If       End If

' See if the name is in the Tables collection. Test = Db.TableDefs(TName).Name If Err <> NAME_NOT_IN_COLLECTION Then Found = True

' Reset the error variable. Err = 0

' See if the name is in the Queries collection. Test = Db.QueryDefs(TName$).Name If Err <> NAME_NOT_IN_COLLECTION Then Found = True Db.Close IsTableQuery = Found End Function   To test this function, type the following line in the Debug window, and then press ENTER: ?CreateGraphFromFile("C:\MyPPT.ppt", "Category Sales for 1995","") Note that a Microsoft PowerPoint 97 Presentation file, called MyPPT.ppt, is created with a Bar chart. The CategoryName field is the column value heading and the CategorySales field contains the data for the chart. 

