Accommodating for Missing Parameters in Your Code : Function Parameter « Language Basics « VBA / Excel / Access / Word






  1. VBA / Excel / Access / Word
  2. Language Basics
  3. Function Parameter

Accommodating for Missing Parameters in Your Code

 
Function ReturnInit3(ByVal strFName As String,Optional ByVal strMI, Optional ByVal strLName)
    Dim strResult As String

    If IsMissing(strMI) And IsMissing(strLName) Then
        ReturnInit3 = strFName
    ElseIf IsMissing(strMI) Then
        ReturnInit3 = strLName & ", " & strFName
    ElseIf IsMissing(strLName) Then
        ReturnInit3 = strFName & " " & strMI
    Else
        ReturnInit3 = strLName & "," & strFName & " " & strMI
    End If
End Function
Sub MissingPara()
    msgBox ReturnInit3("A", , "B")
End Sub








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6.Substitute a default value if an optional parameter is not provided
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8.Using the Select Case Statement to check the function parameter
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10.Passing by Reference Versus Passing by Value
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12.Illustrate a reason why you might want to pass a parameter by reference
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15.Named Parameters: Eliminate the Need to Count Commas
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