[VB.NET] Beispiel: Alle unterstützten Bildschirmauflösungen ermitteln

    <StructLayout(LayoutKind.Sequential)> _
    Public Structure DEVMODE1
        <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=32)> _
        Public dmDeviceName As String
        Public dmSpecVersion As Short
        Public dmDriverVersion As Short
        Public dmSize As Short
        Public dmDriverExtra As Short
        Public dmFields As Integer
 
        Public dmOrientation As Short
        Public dmPaperSize As Short
        Public dmPaperLength As Short
        Public dmPaperWidth As Short
 
        Public dmScale As Short
        Public dmCopies As Short
        Public dmDefaultSource As Short
        Public dmPrintQuality As Short
        Public dmColor As Short
        Public dmDuplex As Short
        Public dmYResolution As Short
        Public dmTTOption As Short
        Public dmCollate As Short
        <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=32)> _
        Public dmFormName As String
        Public dmLogPixels As Short
        Public dmBitsPerPel As Short
        Public dmPelsWidth As Integer
        Public dmPelsHeight As Integer
 
        Public dmDisplayFlags As Integer
        Public dmDisplayFrequency As Integer
 
        Public dmICMMethod As Integer
        Public dmICMIntent As Integer
        Public dmMediaType As Integer
        Public dmDitherType As Integer
        Public dmReserved1 As Integer
        Public dmReserved2 As Integer
 
        Public dmPanningWidth As Integer
        Public dmPanningHeight As Integer
    End Structure
 
    <DllImport("user32.dll")> _
    Public Shared Function EnumDisplaySettings(ByVal deviceName As String, ByVal modeNum As Integer, ByRef devMode As DEVMODE1) As Integer
    End Function
 
    Function GetSupportedResolutions() As List(Of String)
        Dim list1 As New List(Of String)
 
        Dim lResult As Long
        Dim i As Long
        Dim DevM As New DEVMODE1
 
        i = 0
        Do
            lResult = EnumDisplaySettings(Nothing, i, DevM)
            If lResult = 0 Then Exit Do
            With DevM
                Dim res As String = .dmPelsWidth & "x" & .dmPelsHeight
                If Not list1.Contains(res) AndAlso .dmBitsPerPel = 32 Then
                    list1.Add(res)
                End If
            End With
            i = i + 1
        Loop
 
        Return list1
    End Function