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Links To Excel Code Examples

Range/Wkb/Wks Variables
Add Grand Totals Using Ranges
Using Range Offset Property
Using Range Find Method
Union Of Ranges
Parse Range Strings
Delete Duplicate Rows
Delete Rows And Columns
Worksheet Variables
TypeName And TypeOf
Loop Through Worksheets
Loop Through Open Workbooks
Form Button Magic
Command Button Magic
Add Worksheets Dynamically
Find Last Row Or Column
Copy And Paste Special
Copy To Specific Cell Types
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
Dynamically Load Formulas
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

Links To Access Code Examples

Create Recordset With AddNew
Multi-Select List Boxes
Update Field(s) In A Recordset
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
Using The Dlookup Command
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

 

Excel Common Error Handler

The VBA code illustrates a common error handler technique. Keep in mind there are three forms of the On Error Statement. All three of these clear any previous error codes (Err.Number and Err.Description):

(1) On Error GoTo Line (A User Defined Error Handling Routine)
(2) On Error GoTo 0 (Turns Off User Error Handling)
(3) On Error Resume Next (Ignores the Error And Executes The Next Statement)

The code examples also illustrate the following:

(1) Err.Clear (Clear Error Codes But Leave Any User Error Handlers Still Active)
(2) Resume (Clear Error Codes But Leave Any User Error Handlers Still Active)

For a list of all error codes, see VBA Error Codes.

Program Code

Option Explicit
Sub TestError()
' ************************************************************
' This Creates An Error With Divide By Zero
' ************************************************************

' ************************************************************
' Demonstrate The Following:
' (1) On Error GoTo ErrorHandler (Reset Previous Err.Number)
' (2) On Error GoTo ErrorHandler (Create User Error Handling)
' (3) On Error GoTo 0 (Removes User Error Handling)
' (4) On Error GoTo 0 (Also Resets Err.Number to 0)
' (5) Resume (Resets The Err.Number and Err.Description)
' (6) Resume (Leaves User Error Handling Intact)
' (7) Proper User of Err.Number and Err.Description
' ************************************************************
Dim intDividend As Integer
Dim intDivisor As Integer
Dim intResult As Integer
Dim varErrorReturn As Variant

intDivisor = 0
intDividend = 20

' ************************************************************
' Reset Any Previous Error Codes And Set User Error Handling
' ************************************************************
On Error GoTo ErrorHandler

intResult = intDividend / intDivisor

Exit_Procedure:
' ************************************************************
' On Error GoTo 0 Removes Any User Error Trapping
' Also Resets The Err.Number and Err.Description
' ************************************************************
On Error GoTo 0
Exit Sub

ErrorHandler:
Call CommonErrorHandler(Err.Number, Err.Description)

' ************************************************************
' The Resume Command Resets The Error Code to 0
' But It Leaves The "On Error GoTo ErrorHandler Intact
' ************************************************************
Resume Exit_Procedure

End Sub

Sub TestError1()
' ************************************************************
' This Create An Error With Divide By Zero
' ************************************************************

' ************************************************************
' Demonstrate The Following:
' (1) On Error Resume Next (Reset Previous Error Codes)
' (2) On Error Resume Next (Keep Processing Even If Errors)
' (3) How To Test For A Specific Err.Number
' (4) Err.Clear (Clear Error Code and Description)
' (5) Err.Clear (Leave Any User Error Trapping Intact)
' (6) On Error GoTo 0 (Removes User Error Handling)
' (7) On Error GoTo 0 (Also Resets Err.Number to 0)
' ************************************************************

Dim intDividend As Integer
Dim intDivisor As Integer
Dim intResult As Integer
Dim varErrorReturn As Variant

intDivisor = 0
intDividend = 20
intResult = 5

' ************************************************************
' The "On Error Resume Next" Clears Any Previous Error Codes
' Then Instructs Excel To Continue Processing The Next
' Statement Even If An Error Occurs. If an Error Occurs,
' Keep Any Err.Code And Err.Description So The Values Can
' Be Tested
' ************************************************************
On Error Resume Next

intResult = intDividend / intDivisor
If Err.Number = 11 Then
    intResult = 10
' ************************************************************
' The Err.Clear Command Resets The Error Code to 0
' But It Leaves the "On Error Resume Next" Intact
' ************************************************************
    Err.Clear
    Exit Sub
End If

' ************************************************************
' On Error GoTo 0 Removes Any User Error Trapping
' Also Resets The Err.Number and Err.Description
' ************************************************************
On Error GoTo 0
Exit Sub

End Sub

' ************************************************************
' The Common Error Display Routine
' ************************************************************
Public Sub CommonErrorHandler(ErrorNumber As String, ErrorDescription As String)

Dim varMessageReturn As Variant

varMessageReturn = MsgBox("An Error Occurred In This Application" & vbCrLf & _
       "Please Contact The Developer" & vbCrLf & vbCrLf & _
       "Error Number = " & ErrorNumber & "  Error Description = " & _
        ErrorDescription, vbCritical)

End Sub

Option Explicit
Public NoRadius As Variant
Public NotANumber As Variant
Dim Radius As Variant


' ************************************************************
' User Defined Error Codes
' This feature is rarely used, but here is an example of
' how to create user defined error codes and test for them.
' ************************************************************

Sub AreaOfCircle()
' ************************************************************
' Note That Radius Will Be An Error Type or a String Type
' Depending On The User Input
' ************************************************************
Const PI = 3.142
NoRadius = CVErr(2010)
NotANumber = CVErr(2020)
Radius = CheckData(InputBox("Enter the radius: "))
If IsError(Radius) Then
   Select Case Radius
      Case NoRadius
         MsgBox "Error: No radius given."
      Case NotANumber
         MsgBox "Error: Radius is not a number."
      Case Else
         MsgBox "Unknown Error."
   End Select
Else
   ' ****************************************************
   ' Note That Excel Auto-Converts The String Radius To
   ' A Double
   ' ****************************************************
   MsgBox "The area of the circle is " & (PI * Radius ^ 2)
End If
End Sub

Function CheckData(TheRadius)
If Not IsNumeric(TheRadius) Then
   CheckData = NotANumber
ElseIf TheRadius = 0 Then
   CheckData = NoRadius
Else
   CheckData = TheRadius
End If
End Function