C# と VB.NET の質問掲示板

>魔界の仮面弁士 さん


> 通常の SDI における「子.Show(親)」で表示させる方法ではなく、
> あくまでも親のクライアント領域内に子を表示させる画面構成でしょうか。

これはどういう画面構成のことをさしていますか？
自分としては、
通常の MDI における「子.Show(親)」で表示させる方法を使うつもりですので
異なる方法でしょうか？



>とっちゃん さん

検索して調べたところ、恐らくこの方法を使えばいけると思います。

https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1475227379

翻訳サイトを使ってVBに変換したのですが

            InitializeComponent()
            Dim hwnd As IntPtr = Form1.GetWindow(Me.Handle, GW_CHILD)
                    Me.wpd = New WndProcDelegate(NewWndProc)


の三カ所でエラーが出てしまいます。


一体どのように修正すればよろしいでしょうか？


        Private Declare Function GetWindow Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal uCmd As Integer) As IntPtr

        Private Declare Function GetClassName Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal lpClassName As StringBuilder, ByVal nMaxCount As Integer) As Integer

        Private Declare Function SetWindowLong Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal nIndex As Integer, ByVal NewWndProc As WndProcDelegate) As IntPtr

        Private Declare Function SetWindowLongPtr Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal nIndex As Integer, ByVal NewWndProc As WndProcDelegate) As IntPtr

        Private Declare Function CallWindowProc Lib "user32.dll" (ByVal lpPrevWndFunc As IntPtr, ByVal hWnd As IntPtr, ByVal Msg As UInteger, ByVal wParam As Integer, ByVal lParam As Integer) As Integer

        Private Const GW_HWNDNEXT As Integer = 2

        Private Const GW_CHILD As Integer = 5

        Private Const WM_NCCALCSIZE As Integer = 131

        Private Const GWL_WNDPROC As Integer = -4

        Private PrevWndProc As IntPtr

        Public Delegate Function WndProcDelegate(ByVal hWnd As IntPtr, ByVal uMsg As UInteger, ByVal wParam As Integer, ByVal lParam As Integer) As Integer

        Private wpd As WndProcDelegate

        Public Sub New()
            MyBase.New
            InitializeComponent()
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
            Dim sb As StringBuilder = New StringBuilder(100)
            Dim hwnd As IntPtr = Form1.GetWindow(Me.Handle, GW_CHILD)

            While (hwnd <> IntPtr.Zero)
                Form1.GetClassName(hwnd, sb, sb.Capacity)
                If (sb.ToString.IndexOf("MDICLIENT") <> -1) Then
                    Me.wpd = New WndProcDelegate(NewWndProc)
                    If (IntPtr.Size = 4) Then
                        Me.PrevWndProc = Form1.SetWindowLong(hwnd, GWL_WNDPROC, Me.wpd)
                    Else
                        Me.PrevWndProc = Form1.SetWindowLongPtr(hwnd, GWL_WNDPROC, Me.wpd)
                    End If

                    Return
                End If

                hwnd = Form1.GetWindow(hwnd, GW_HWNDNEXT)

            End While

        End Sub

        Private Function NewWndProc(ByVal hWnd As IntPtr, ByVal uMsg As UInteger, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
            If (uMsg = WM_NCCALCSIZE) Then
                Return 0
            End If

            Return Form1.CallWindowProc(Me.PrevWndProc, hWnd, uMsg, wParam, lParam)
        End Function
    End Class