Selection Structures ; String Functions

If…Then…Else If condition Then [instructions when the condition is true] [Else [instructions when the condition is false]] End If If condition Then … [Else … ]

Select Case selection structure Select Case testexpression [Case expressionlist1 [instructions for the first Case]] [Case expressionlist2 [instructions for the second Case]] [Case expressionlistn [instructions for the nth Case]] [Case Else [instructions for the default case]] End Select

Dim intPosition as Integer intPosition = Val(txtPosition.Text) Select Case intPosition Case 1 picOutcome.Print "Win" Case 2 picOutcome.Print "Place" Case 3 picOutcome.Print "Show" Case 4, 5 picOutcome.Print ”Almost!" Case Else picOutcome.Print "Out of luck.” End Select

Is and To Use the To keyword to specify a range of values when you know both the minimum and maximum values in the range. Use the Is keyword to specify a range of values when you don’t know both the minimum and the maximum values in the range.

Private Sub cmdDescribe_Click() Dim intPosition as Integer intPosition = Val(txtPosition.Text) Select Case intPosition Case 1 To 3 picOutcome.Print "In the money." picOutcome.Print "Congratulations!" Case Is > 3 picOutcome.Print "Not in the money" End Select End Sub

Select Case statements (cont.) You can use multiple expressions or ranges in each Case clause. Case 1 To 4, 7 To 9, 11, Is > MaxNumber Select Case statements can be nested.

UCase Function Returns a string containing the specified string, converted to uppercase. Syntax: UCase(string) Examples: Dim strConvert, strTemp As String strTemp = “ants” strTemp = UCase(strTemp) strConvert = UCase(“Allyson”)

LCase Function Returns a string that has been converted to lowercase. Syntax: LCase(string) Examples: Dim strConvert, strTemp As String strTemp = “Ronald McDonald” strTemp = Lcase(strTemp) strConvert = LCase(“Allyson”)

Len Function Returns a Long containing the number of characters in a string. Syntax: Len(string or variablename) Example: MyString = "Hello World" MyLen = Len(MyString) 'Returns 11.

Left Function Returns a Variant (String) containing a specified number of characters from the left side of a string. Syntax: Left(string, length) Examples: AnyString = "Hello World" MyStr = Left(AnyString, 1) MyStr = Left(AnyString, 7)

Right Function Returns a string containing a specified number of characters from the right side of a string. Syntax: Right(string, length) Examples: AnyString = "Hello World” MyStr = Right(AnyString, 1) MyStr = Right(AnyString, 6)

Mid Function Returns a string containing a specified number of characters from a string. Syntax: Mid(string, start[, length]) Examples: MyString = "Mid Function Demo” FirstWord = Mid(MyString, 1, 3) LastWord = Mid(MyString, 14, 4) MidWords = Mid(MyString, 5)