December 28, 2009
(Portions of this code are adapted from the book “Excel 2007 Power Programming with VBA” )
This code sample is an Excel 2007 macro that extracts all of the named toolbar button pictures from Excel 2007, transfers those pictures to an Oracle database (stored in a BLOB), and then retrieves each of the pictures and displays the pictures on an Excel worksheet.
First, we need to create a table to hold the pictures:
CREATE TABLE EXCEL2007_TOOLBAR_PICTURES ( PICTURE_NAME VARCHAR2(60), PICTURE_SIZE NUMBER, PICTURE BLOB, PRIMARY KEY(PICTURE_NAME));
Download the ExcelImageList.doc file and save it using Microsoft Word as a Plain Text File with the name ExcelImageList.txt in the root of the C:\ drive.
We need to make certain that macro support is enabled in Excel 2007, by default it is disabled. Follow steps 1 through 3 to verify that the Developer tab appears at the top of the screen:
On the Developer tab, click the Visual Basic button. We need to add a reference to the Microsoft ActiveX Data Objects to allow the macro to interact with an Oracle database. From the Tools menu, select References…
Locate one of the recent releases of Microsoft ActiveX Data Objects, select it, then click OK.
Finally, we create the following macro:
Private Sub ExtractAllImages() Dim i As Integer Dim intResult As Integer Dim intFileNum As Integer Dim intFileNum2 As Integer Dim sglX As Single Dim sglY As Single Dim strName As String Dim strSQL As String Dim strDatabase As String Dim strUserName As String Dim strPassword As String Dim bytPicture() As Byte Dim imgPicture As OLEObject Dim snpData As New ADODB.Recordset Dim dynData As New ADODB.Recordset Dim dbDatabase As New ADODB.Connection On Error Resume Next 'Remove all of the previously created sheet Application.DisplayAlerts = False Sheets("BuiltInImages").Delete Sheets.Add ActiveSheet.Name = "BuiltInImages" DoEvents Application.DisplayAlerts = True If Len(Dir("C:\ExcelBuiltInImages", vbDirectory)) < 4 Then 'Create the folder to hold the exported pictures MkDir "C:\ExcelBuiltInImages" End If 'Create a temporary image object to hold the pictures from GetImageMso Set imgPicture = Sheets("BuiltInImages").OLEObjects.Add(classtype:="Forms.Image.1", Left:=800, Top:=1, Width:=32, Height:=32) With imgPicture.Object .AutoSize = True .BorderStyle = 0 End With Err = 0 intFileNum = FreeFile Open "C:\ExcelImageList.txt" For Input As #intFileNum If Err <> 0 Then intResult = MsgBox("Could not open the image list file." & vbCrLf & Error(Err), 16, "Excel Demo") Exit Sub End If strDatabase = "MyDB" 'From tnsnames.ora strUserName = "MyUserID" strPassword = "MyPassword" 'Connect to the database 'Oracle connection string dbDatabase.ConnectionString = "Provider=OraOLEDB.Oracle;Data Source=" & strDatabase & ";User ID=" & strUserName & ";Password=" & strPassword & ";ChunkSize=1000;FetchSize=100;" dbDatabase.ConnectionTimeout = 40 dbDatabase.CursorLocation = adUseClient dbDatabase.Open If (dbDatabase.State <> 1) Or (Err <> 0) Then intResult = MsgBox("Could not connect to the database. Check your user name and password." & vbCrLf & Error(Err), 16, "Excel Demo") End If 'The table definition 'CREATE TABLE EXCEL2007_TOOLBAR_PICTURES ( ' PICTURE_NAME VARCHAR2(60), ' PICTURE BLOB, ' PRIMARY KEY(PICTURE_NAME)); If Err = 0 Then 'Remove pictures that were previously brought in strSQL = "DELETE FROM EXCEL2007_TOOLBAR_PICTURES" dbDatabase.Execute strSQL dbDatabase.BeginTrans 'Prepare to add the new pictures to the database strSQL = "SELECT" strSQL = strSQL & " PICTURE_NAME," & vbCrLf strSQL = strSQL & " PICTURE_SIZE," & vbCrLf strSQL = strSQL & " PICTURE" & vbCrLf strSQL = strSQL & "FROM" & vbCrLf strSQL = strSQL & " EXCEL2007_TOOLBAR_PICTURES" dynData.Open strSQL, dbDatabase, adOpenKeyset, adLockOptimistic, adCmdText 'Process each of the toolbar picture names from the text file Do While Not (EOF(intFileNum)) i = i + 1 'Read a toolbar picture name from the text file Line Input #intFileNum, strName Application.StatusBar = strName 'Set the picture in the temporary image object, and then save to disk imgPicture.Object.Picture = Application.CommandBars.GetImageMso(strName, 32, 32) SavePicture imgPicture.Object.Picture, "C:\ExcelBuiltInImages\temp.bmp" 'Create a new row in the table dynData.AddNew dynData("picture_name") = strName & ".bmp" dynData("picture_size") = FileLen("C:\ExcelBuiltInImages\temp.bmp") 'Read the picture into the table intFileNum2 = FreeFile Open "C:\ExcelBuiltInImages\temp.bmp" For Binary As #intFileNum2 'Prepare a variable of byte data type to hold the picture read from disk ReDim bytPicture(FileLen("C:\ExcelBuiltInImages\temp.bmp")) Get #intFileNum2, , bytPicture Close #intFileNum2 'Write the picture into the table and save the row dynData.Fields("picture").AppendChunk bytPicture dynData.Update 'Delete the picture from the folder Kill "C:\ExcelBuiltInImages\temp.bmp" Loop Application.StatusBar = "" dbDatabase.CommitTrans dynData.Close Close #intFileNum 'Remove the temporary image object imgPicture.Delete 'Retrieve the pictures from the database and display in Excel i = 0 strSQL = "SELECT" & vbCrLf strSQL = strSQL & " PICTURE_NAME," & vbCrLf strSQL = strSQL & " PICTURE_SIZE," & vbCrLf strSQL = strSQL & " PICTURE" & vbCrLf strSQL = strSQL & "FROM" & vbCrLf strSQL = strSQL & " EXCEL2007_TOOLBAR_PICTURES" & vbCrLf strSQL = strSQL & "ORDER BY" & vbCrLf strSQL = strSQL & " PICTURE_NAME" snpData.Open strSQL, dbDatabase If Not (snpData.EOF) Then Do While Not (snpData.EOF) i = i + 1 Application.StatusBar = snpData("picture_name") 'Retrieve the picture from the database and write to a file ReDim bytPicture(snpData("picture_size")) bytPicture = snpData("picture") intFileNum2 = FreeFile Open "C:\ExcelBuiltInImages\" & snpData("picture_name") For Binary As #intFileNum2 Put #intFileNum2, , bytPicture Close #intFileNum2 'There will be 20 pictures across the page, so identify the top left position of the picture sglX = ((i - 1) Mod 20) * 36 sglY = Int((i - 1) / 20) * 36 'Create the shape object and load the picture that was saved from the image object With Sheets("BuiltInImages").Shapes.AddShape(Type:=msoShapeRectangle, Left:=sglX, Top:=sglY, Width:=30, Height:=30) .Line.Visible = False .Fill.UserPicture "C:\ExcelBuiltInImages\" & snpData("picture_name") .AlternativeText = snpData("picture_name") End With 'Allow Excel to refresh the screen as every four rows complete If i Mod 80 = 0 Then Application.ScreenUpdating = True DoEvents Application.ScreenUpdating = False End If snpData.MoveNext Loop snpData.Close End If End If Application.ScreenUpdating = True Application.StatusBar = "" dbDatabase.Close 'Clean up Set snpData = Nothing Set dynData = Nothing Set dbDatabase = Nothing Set imgPicture = Nothing End Sub
When the macro runs, it saves each of the built-in toolbar icons to a file named temp.bmp, and then inserts a row into the database table with the temp.bmp picture. Once all of the pictures are stored in the database, a query is run to retrieve each of the pictures, create a file in ExcelBuiltInImages folder for that picture, and then display the picture in Excel. The screen is refreshed after every 80 pictures are displayed. Note that most of the built-in toolbar icons are designed to be viewed at a size of 16 pixels by 16 pixels, rather than 32 pixels by 32 pixels – so the images may appear a bit “blocky”. The picture filenames are stored in the Alt Text property of each picture, which may be viewed by right-clicking a picture and selecting Size and Properties…