Visual Basic 6の基礎 - 関数のソースを表示

== 概要 ==

<br><br>

== 基本構文 ==
 <syntaxhighlight lang="vb">
 ' 関数
 [Private|Public] Function <関数名>([<引数> As <型>, ...]) [As <戻り値の型>]
    ' 処理
    関数名 = 戻り値  '戻り値の設定
 End Function
 
 ' サブルーチン
 [Private|Public] Sub <サブルーチン名>([<引数> As <型>, ...])
    ' 処理
    ' ...略
 End Sub
 </syntaxhighlight>
<br><br>

== プロパティ==
 <syntaxhighlight lang="vb">
 Property Get <プロパティ名>() As <型>
    ' 取得処理
    ' ...略
 End Property
 </syntaxhighlight>
<br>
 <syntaxhighlight lang="vb">
 Property Let <プロパティ名>(<値> As <型>)
    ' 設定処理
 End Property
 </syntaxhighlight>
<br><br>

== 引数の修飾子 ==
* ByVal
*: 値渡し
* ByRef
*: 参照渡し (デフォルト)
* Optional
*: 省略可能な引数
* ParamArray
*: 可変長引数
<br><br>

== 関数の定義例 ==
==== 基本的な関数 ====
 <syntaxhighlight lang="vb">
 Private Function Add(ByVal x As Integer, ByVal y As Integer) As Integer
    Add = x + y
 End Function
 
 ' 使用例
 Dim result As Integer
 result = Add(5, 3)  ' result = 8
 </syntaxhighlight>
<br>
==== 参照渡しのサブルーチン ====
 <syntaxhighlight lang="vb">
 Private Sub Swap(ByRef a As Integer, ByRef b As Integer)
    Dim temp As Integer
    temp = a
    a = b
    b = temp
 End Sub
 
 ' 使用例
 Dim x As Integer, y As Integer
 x = 1
 y = 2
 Swap x, y  ' x = 2, y = 1
 </syntaxhighlight>
<br>
==== オプション引数 ====
 <syntaxhighlight lang="vb">
 Private Function Multiply(ByVal x As Integer, Optional ByVal y As Integer = 1) As Integer
    Multiply = x * y
 End Function
 
 ' 使用例
 Dim result As Integer
 result = Multiply(5)     ' result = 5
 result = Multiply(5, 2)  ' result = 10
 </syntaxhighlight>
<br>
==== 可変長引数 ====
 <syntaxhighlight lang="vb">
 Private Function Sum(ParamArray numbers() As Variant) As Long
    Dim total As Long
    Dim i As Integer
 
    For i = 0 To UBound(numbers)
       total = total + numbers(i)
    Next
 
    Sum = total
 End Function
 
 ' 使用例
 Dim result As Long
 result = Sum(1, 2, 3, 4, 5)  ' result = 15
 </syntaxhighlight>
<br>
==== プロパティ ====
 <syntaxhighlight lang="vb">
 Private m_Name As String
 
 Property Get Name() As String
    Name = m_Name
 End Property
 
 Property Let Name(ByVal value As String)
    m_Name = value
 End Property
 
 ' 使用例
 Me.Name = "Test"     ' 設定
 Debug.Print Me.Name  ' 取得
 </syntaxhighlight>
<br><br>


{{#seo:
|title={{PAGENAME}} : Exploring Electronics and SUSE Linux | MochiuWiki
|keywords=MochiuWiki,Mochiu,Wiki,Mochiu Wiki,Electric Circuit,Electric,pcb,Mathematics,AVR,TI,STMicro,AVR,ATmega,MSP430,STM,Arduino,Xilinx,FPGA,Verilog,HDL,PinePhone,Pine Phone,Raspberry,Raspberry Pi,C,C++,C#,Qt,Qml,MFC,Shell,Bash,Zsh,Fish,SUSE,SLE,Suse Enterprise,Suse Linux,openSUSE,open SUSE,Leap,Linux,uCLnux,Podman,電気回路,電子回路,基板,プリント基板
|description={{PAGENAME}} - 電子回路とSUSE Linuxに関する情報 | This page is {{PAGENAME}} in our wiki about electronic circuits and SUSE Linux
|image=/resources/assets/MochiuLogo_Single_Blue.png
}}

__FORCETOC__
[[カテゴリ:その他]]