Question

I’ve found nice examples using C++ (http://www.codeproject.com/KB/tips/resswitch.aspx), but not in C#.

Can someone help, please?

Edit: The exact function that list the video modes is:

BOOL CVideoModes::GetAvailableVideoModes(CAvailableVideoModes& modes) {   modes.SetSize(0, 5);   int i=0;   DEVMODE dm;    while (EnumDisplaySettings(NULL, i, &dm))   {     CVideoMode thismode(dm.dmBitsPerPel, dm.dmPelsWidth,                          dm.dmPelsHeight, dm.dmDisplayFrequency);     modes.SetAtGrow(i, thismode);     ++i;   }    modes.FreeExtra();    return (i>0); } 

But sincerelly I cannot understand that C++ code. Where I can find that ‘thismode’ function?

Answer 1

If you mean video modes are available resolutions, try to invoke EnumDisplaySettingsEx

details can be found here:

http://msdn.microsoft.com/en-us/library/dd162612(VS.85).aspx

small program that lists available resolutions:

using System; using System.Linq; using System.Runtime.InteropServices; using System.Windows.Forms;  namespace ListResolutions {      class Program     {         [DllImport('user32.dll')]         public static extern bool EnumDisplaySettings(               string deviceName, int modeNum, ref DEVMODE devMode);         const int ENUM_CURRENT_SETTINGS = -1;          const int ENUM_REGISTRY_SETTINGS = -2;          [StructLayout(LayoutKind.Sequential)]         public struct DEVMODE         {              private const int CCHDEVICENAME = 0x20;             private const int CCHFORMNAME = 0x20;             [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x20)]             public string dmDeviceName;             public short dmSpecVersion;             public short dmDriverVersion;             public short dmSize;             public short dmDriverExtra;             public int dmFields;             public int dmPositionX;             public int dmPositionY;             public ScreenOrientation dmDisplayOrientation;             public int dmDisplayFixedOutput;             public short dmColor;             public short dmDuplex;             public short dmYResolution;             public short dmTTOption;             public short dmCollate;             [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x20)]             public string dmFormName;             public short dmLogPixels;             public int dmBitsPerPel;             public int dmPelsWidth;             public int dmPelsHeight;             public int dmDisplayFlags;             public int dmDisplayFrequency;             public int dmICMMethod;             public int dmICMIntent;             public int dmMediaType;             public int dmDitherType;             public int dmReserved1;             public int dmReserved2;             public int dmPanningWidth;             public int dmPanningHeight;          }          static void Main(string[] args)         {                             DEVMODE vDevMode = new DEVMODE();                 int i = 0;                 while (EnumDisplaySettings(null, i, ref vDevMode))                 {                     Console.WriteLine('Width:{0} Height:{1} Color:{2} Frequency:{3}',                                             vDevMode.dmPelsWidth,                                             vDevMode.dmPelsHeight,                                             1 << vDevMode.dmBitsPerPel,         vDevMode.dmDisplayFrequency                                         );                 i++;                 }         }      }  }