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Links To Excel Code Examples

Range/Wkb/Wks Variables
Add Grand Totals Using Ranges
Using Range Offset Property
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Parse Range Strings
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Worksheet Variables
TypeName And TypeOf
Loop Through Worksheets
Loop Through Open Workbooks
Form Button Magic
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Add Worksheets Dynamically
Find Last Row Or Column
Copy And Paste Special
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Range Copy With Filter
Open An Excel File
Open An Excel File w/Params
Open An Excel File On Web
Save A Workbook
Clone A Workbook
Test If WEB URL Exists
Parse Using Split Command
Color Management
Convert Cell Color To RGB
Sort Methods 2003 - 2010
Sort Alpha/Numeric In ASCII
Search Using Match Function
Search Using Vlookup Function
Using Find Instead of Vlookup
Remove String Non-Printables
Auto_Open And Auto_Close
Initialize Form At Open
Edit Numerics In UserForm
Load Combo And List Boxes
Floating Sheet Combo Boxes
Advanced User Form Coding
Excel Events
Worksheet Change Events
Binary Search Of Array
Typecast Constants
Excel Error Handling
Handling Optional Parameters
Data Validation Drop Downs
Read A Text File w/Handle
Write A Text File w/Handle
Read A Text Fiile w/Script
Text File Processing Examples
Test For Exists Or Open
Splash Screen
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Date Examples
Date Find Same Days
Convert Month To Number
Initialize Arrays
Load Arrays Using Evaluate
Redim An Array
Reassign Button Action
Timer Functions
Legacy Calendar Control
Excel 2010 Date Picker
Date Picker Alternative
Generate Multiple Worksheets
Read Access Data Into Excel
Send Outlook Email w/Attach
Copy AutoFilters To Sheets
Export A Text File
Get Windows User Name
VBA Format Statement
Manipulate Files via VBA
Dynamically Load Images
Loop Through Worksheet Objects
Loop Through Form Objects
Loop Through Files with DIR
Active-X Checkboxes
Add Forms Checkboxes Dynam
Paste Pictures Into Excel
Copy Pictures Sheet To Sheet
Copy Pictures Sheet To Sheet
Create Forms Buttons With VBA
Extract Filename From Path
Convert R1C1 Format to A1
Special Cells Property
Insert Cell Comments

Links To Access Code Examples

Create Recordset With AddNew
Multi-Select List Boxes
Update Field(s) In A Recordset
Update Excel Pivot From Access
Import A Tab Delimited File
Export Excel FileDialog
Create Excel Within Access
Open Excel Within Access
Open Excel OBJ From Access
Format Excel From Access
Import Tab Delim w/WinAPI
Initialize Global Variables
Using TempVars For Globals
Access Error Handling
Loop Through Form Controls
Insert A Calendar Control
Create A Filtered Recordset
Populate Combo Boxes
Bookmarks And Forms
Combo Box Multiple Sources
Passing Form Objects
Create VBA SQL Statements
Create Dynamic Queries
Display File Images On A Form
Manipulate Files via VBA
Manipulate Files via Scripting
Number Subform Records
Reference Subform Objects
Parse Delimited Fields
Parameterized Queries (VBA)
Manipulating QueryDefs In VBA
FindFirst On Combined Keys
Dlookup Command
Dlookup In Form Datasheet
Execute SQL Delete Records
Commit Form To Table
Report With No Data
Reference Form Objects
DSNLess Connections To MySQL
Print Active Form Record
Count Records in Linked Tables
Delete Empty Tables
Open Linked SQL Tables


Populate Dependent Combo Boxes (Drop Down Boxes) In Access

When selecting the contents from a combo box, it is sometimes useful for the results of the first selection to be used as a filter for the second combo box. For example, suppose the first combo box was a list of purchase orders issued by a clothing manufacturer. After selecting a particular PO, then the clothing style numbers associated with the selected PO would be the only ones to populate the second dependent combo box (instead of all the style numbers from all the purchase orders).

A snippet of the form would appear as follows:

The record source for the PO combo box is a query that groups by PO Number from a purchase order table that contains all the POs and all the styles for each PO. The PO record source query appears as follows:

Once the PO number has been selected by the user, the value of the PO needs to be stored in a global variable visible to modules and other objects outside the form. This code would be triggered by the "After Update" event for the PO combo box.

Private Sub cmbPONumber_AfterUpdate()
' ***********************************************************************
' Store The PO Number Selected In A Global Variables
' ***********************************************************************
If IsNull(cmbPONumber.Value) Or cmbPONumber.Value = "" Then
    Exit Sub
End If

strGlobalSelectedPONumber = cmbPONumber.Value

End Sub

When the user selects the Style combo box, it will show a filtered list of styles associated only with the PO selected in the previous combo box. Filtering for styles associated with just the single selected PO is accomplished by using a row source query that filters on the PO number stored in the global variable:

The important item to notice here is that the query contains a function called "GetPO()". This function merely returns the value of the PO which was stored in a global variable as the result of the "After Update" event for the PO combo box. The program code for the GetPO() function (which is a public function contained in a module, not a form) is as follows:

Option Compare Database
Option Explicit

Public Function GetPO()
GetPO = strGlobalSelectedPONumber
End Function

The above function, when called from the criteria section of a query, filters the query results so that only the styles associated with the selected PO are delivered to the Style combo box. In other words, using this technique makes it unnecessary for the programmer to manually construct a SELECT statement with a WHERE clause as the row source for a filtered dependent combo box.

Populate A Combo Box One Entry At A Time

Occasionally you want to populate a Combo Box where the Row Source Type is a Value List instead of a query or table. In cases like this where the content of the Combo Box might change during the use of the application, it needs to be cleared before adding the new values. The code below illustates this method:

Option Compare Database
Option Explicit

Private Sub cmdLoadCombo_Click()
' *****************************************************
' Note That Row Source Type Must Be Set to Value List
' *****************************************************
Dim i As Integer
' *****************************************************
' Remove Previous Entries
' *****************************************************
For i = 1 To Me.cmbTest.ListCount
    Me.cmbTest.RemoveItem (0)
Next i

' *****************************************************
' Add New Entries
' *****************************************************
Me.cmbTest.AddItem "A"
Me.cmbTest.AddItem "B"
Me.cmbTest.AddItem "C"
End Sub