public DEVMODE1 getCurrentResolution()
{
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
if (0 != User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm))
{
Console.WriteLine("\t" +
"{0} by {1}, " +
"{2} bit, " +
"{3} degrees, " +
"{4} hertz",
dm.dmPelsWidth,
dm.dmPelsHeight,
dm.dmBitsPerPel,
dm.dmDisplayOrientation * 90,
dm.dmDisplayFrequency);
}
else
{
Console.WriteLine("Unable to process your request");
}
return(dm);
}
public static List <KeyValuePair <int, int> > GetPossibleResolutions()
{
var list = new List <KeyValuePair <int, int> >();
DEVMODE dm = new DEVMODE();
int i = 0;
try
{
while (User_32.EnumDisplaySettings(null, i, ref dm))
{
var width = dm.dmPelsWidth;
var height = dm.dmPelsHeight;
if (width != 0 && height != 0)
{
list.Add(new KeyValuePair <int, int>(dm.dmPelsWidth, dm.dmPelsHeight));
}
i++;
}
}
catch (Exception e)
{
logger.Error(e, "Error while obtaining display resolutions");
}
return(list);
}
public DEVMODE1 getMaximumSupportedResolution()
{
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
int i = 0;
while (0 != User_32.EnumDisplaySettings(null, i++, ref dm))
{
;
}
Console.WriteLine("\t" +
"{0} by {1}, " +
"{2} bit, " +
"{3} degrees, " +
"{4} hertz," +
"{5} color",
dm.dmPelsWidth,
dm.dmPelsHeight,
dm.dmBitsPerPel,
dm.dmDisplayOrientation * 90,
dm.dmDisplayFrequency,
dm.dmYResolution);
return(dm);
}
private void videoModeCombo_SelectedIndexChanged(object sender, EventArgs e)
{
int index = videoModeCombo.SelectedIndex;
if (index >= 0)
{
// query our video mode
if (User_32.EnumDisplaySettings(null, index, ref dm) != 0)
{
int flags = 0;
if (writeToRegistrycb.Checked)
{
flags = User_32.CDS_UPDATEREGISTRY;
}
int err = User_32.ChangeDisplaySettings(ref dm, flags);
if (err != User_32.DISP_CHANGE_SUCCESSFUL)
{
MessageBox.Show("Error on ChangeDisplaySettings " + err);
}
}
else
{
MessageBox.Show("Error on EnumDisplaySettings, index= " + index);
}
}
}
// Return a list of all 32-bit display resolutions supported by the CURRENT display.
static public List <DisplayResolution> Get32BitModes()
{
List <DisplayResolution> result = new List <DisplayResolution>();
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
// let's look at all the available modes of the given device, starting at zero
int iModeNum = 0;
// we're stripping out redundant modes (i.e. 640 x 480 60hz, 640 x 480 72hz)
int lastX = 0, lastY = 0;
while (0 != User_32.EnumDisplaySettings(null, iModeNum++, ref dm))
{
int curX = dm.dmPelsWidth;
int curY = dm.dmPelsHeight;
// modes are sorted first by pixel depth. within those groups they're sorted by resolution.
if (dm.dmBitsPerPel == 32)
{
if (curX != lastX || curY != lastY)
{
result.Add(new DisplayResolution(curX, curY));
lastX = curX;
lastY = curY;
}
} // if
} // while
return(result);
} // Get32BitModes
public CResolution(int a, int b)
{
Screen screen = Screen.PrimaryScreen;
int iWidth = a;
int iHeight = b;
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
getMaximumSupportedResolution();
if (0 != User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm))
{
dm.dmPelsWidth = iWidth;
dm.dmPelsHeight = iHeight;
int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
if (iRet == User_32.DISP_CHANGE_FAILED)
{
Console.WriteLine("Unable to process your request");
Console.WriteLine("Description: Unable To Process Your Request. Sorry For This Inconvenience.");
}
else
{
iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
switch (iRet)
{
case User_32.DISP_CHANGE_SUCCESSFUL:
{
break;
//successfull change
}
case User_32.DISP_CHANGE_RESTART:
{
Console.WriteLine("Description: You Need To Reboot For The Change To Happen.\n If You Feel Any Problem After Rebooting Your Machine\nThen Try To Change Resolution In Safe Mode.");
break;
//windows 9x series you have to restart
}
default:
{
Console.WriteLine("Description: Failed To Change The Resolution.");
break;
//failed to change
}
}
}
}
}
public SECResolution(int a, int b)
{
Screen screen;
screen = (Screen)Screen.AllScreens.GetValue(1); ////????????
string name = screen.DeviceName;
int iWidth = a;
int iHeight = b;
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
if (0 != User_32.EnumDisplaySettings(name, User_32.ENUM_CURRENT_SETTINGS, ref dm))
{
dm.dmPelsWidth = iWidth;
dm.dmPelsHeight = iHeight;
// int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
int iRet = User_32.ChangeDisplaySettingsEx(name, ref dm, IntPtr.Zero, User_32.CDS_TEST, IntPtr.Zero);
if (iRet == User_32.DISP_CHANGE_FAILED)
{
MessageBox.Show("Unable to process your request");
MessageBox.Show("Description: Unable To Process Your Request. Sorry For This Inconvenience.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
// iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
iRet = User_32.ChangeDisplaySettingsEx(name, ref dm, IntPtr.Zero, User_32.CDS_UPDATEREGISTRY, IntPtr.Zero);
switch (iRet)
{
case User_32.DISP_CHANGE_SUCCESSFUL:
{
break;
}
case User_32.DISP_CHANGE_RESTART:
{
MessageBox.Show("Description: You Need To Reboot For The Change To Happen.\n If You Feel Any Problem After Rebooting Your Machine\nThen Try To Change Resolution In Safe Mode.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
break;
}
default:
{
MessageBox.Show("Description: Failed To Change The Resolution (2).", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
break;
}
}
}
}
}
public List <DEVMODE1> getSupportedResolutionList()
{
List <DEVMODE1> ResolutionList = new List <DEVMODE1>();
DEVMODE1 CurrentResolution = getCurrentResolution();
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
int previousResolutionX = 0;
int previousResolutionY = 0;
int i = 0, k = 0;
while (0 != User_32.EnumDisplaySettings(null, i++, ref dm))
{
if ((dm.dmPelsWidth > previousResolutionX || dm.dmPelsHeight > previousResolutionY) && dm.dmBitsPerPel >= 32)
{
/* Console.WriteLine("\t" +
* "{0} by {1}, " +
* "{2} bit, " +
* "{3} degrees, " +
* "{4} hertz," +
* "{5} color",
* dm.dmPelsWidth,
* dm.dmPelsHeight,
* dm.dmBitsPerPel,
* dm.dmDisplayOrientation * 90,
* dm.dmDisplayFrequency,
* dm.dmYResolution);*/
k++;
if (dm.dmPelsWidth == CurrentResolution.dmPelsWidth && dm.dmPelsHeight == CurrentResolution.dmPelsHeight && dm.dmBitsPerPel == CurrentResolution.dmBitsPerPel)
{
selectedIndexOfCurrentResolution = k;
}
ResolutionList.Add(dm);
previousResolutionX = dm.dmPelsWidth;
previousResolutionY = dm.dmPelsHeight;
dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
}
}
return(ResolutionList);
}
public static void GetMaxResolutionWithRefreshRate(string deviceName, out int dispWidth, out int dispHeight, out int refreshRate)
{
dispWidth = dispHeight = refreshRate = 0;
DEVMODE1 deviceMode = new DEVMODE1();
for (int i = 0; User_32.EnumDisplaySettings(deviceName, i, ref deviceMode) != 0; i++)
{
if (deviceMode.dmPelsWidth > dispWidth || (deviceMode.dmPelsWidth == dispWidth && deviceMode.dmPelsHeight >= dispHeight && deviceMode.dmDisplayFrequency >= refreshRate))
{
dispWidth = deviceMode.dmPelsWidth;
dispHeight = deviceMode.dmPelsHeight;
refreshRate = deviceMode.dmDisplayFrequency;
}
}
}
public static void Change(int width, int height, int frequency)
{
int iWidth = width;
int iHeight = height;
DEVMODE dm = new DEVMODE();
dm.dmDeviceName = new string(new char[32]);
dm.dmFormName = new string(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
if (User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm) != 0)
{
dm.dmPelsWidth = iWidth;
dm.dmPelsHeight = iHeight;
dm.dmDisplayFrequency = frequency;
int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
if (iRet == User_32.DISP_CHANGE_FAILED)
{
Debug.Log("Unable to process your request");
Debug.Log("Description: Unable To Process Your Request. Sorry For This Inconvenience.");
}
else
{
iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
switch (iRet)
{
case User_32.DISP_CHANGE_SUCCESSFUL:
{
break;
}
case User_32.DISP_CHANGE_RESTART:
{
Debug.Log("分辨率修改成功");
break;
}
default:
{
Debug.Log("自动分辨率修改失败");
break;
}
}
}
}
}
// Return the resolution of the current display device.
// Returns null if the device was for some reason unreadable.
static public DisplayResolution CurrentResolution()
{
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
DisplayResolution result = null;
if (0 != User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm))
{
result = new DisplayResolution(dm.dmPelsWidth, dm.dmPelsHeight);
}
return(result);
}
public List <DEVMODE1> getSupportedResolutionList()
{
List <DEVMODE1> ResolutionList = new List <DEVMODE1>();
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
int previousResolutionX = 0;
int previousResolutionY = 0;
int i = 0;
while (0 != User_32.EnumDisplaySettings(null, i++, ref dm))
{
if (dm.dmPelsWidth > previousResolutionX || dm.dmPelsHeight > previousResolutionY)
{
Console.WriteLine("\t" +
"{0} by {1}, " +
"{2} bit, " +
"{3} degrees, " +
"{4} hertz," +
"{5} color",
dm.dmPelsWidth,
dm.dmPelsHeight,
dm.dmBitsPerPel,
dm.dmDisplayOrientation * 90,
dm.dmDisplayFrequency,
dm.dmYResolution);
ResolutionList.Add(dm);
previousResolutionX = dm.dmPelsWidth;
previousResolutionY = dm.dmPelsHeight;
dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
}
}
return(ResolutionList);
}
public static List <(string key, DEVMODE value)> GetScreenInfo()
{
DEVMODE devMode = new DEVMODE();
//HashSet<string> datas = new HashSet<string>();
List <(string key, DEVMODE value)> devModes = new List <(string key, DEVMODE value)>();
int index = 0;
while (User_32.EnumDisplaySettings(null, index, ref devMode) != 0)
{
var str = $"{devMode.dmPelsWidth}*{devMode.dmPelsHeight}@{devMode.dmDisplayFrequency}Hz";
//datas.Add(str);
devModes.Add((str, devMode));
index++;
}
return(devModes);
}
protected override void OnLoad(System.EventArgs e)
{
dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
int i = 0;
int err = 0;
string selectedStr = null;
int selectedIndex = -1;
err = User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm);
if (err != 0)
{
selectedStr = "" + dm.dmPelsWidth + "x" + dm.dmPelsHeight
+ "x" + dm.dmBitsPerPel + "@" + dm.dmDisplayFrequency;
}
else
{
MessageBox.Show("Unable to query current video mode");
}
while ((err = User_32.EnumDisplaySettings(null, i, ref dm)) > 0)
{
string mode = "" + dm.dmPelsWidth + "x" + dm.dmPelsHeight
+ "x" + dm.dmBitsPerPel + "@" + dm.dmDisplayFrequency;
videoModeCombo.Items.Add(mode);
if (selectedStr != null && mode.Equals(selectedStr))
{
selectedIndex = i;
}
i++;
}
if (selectedIndex >= 0)
{
videoModeCombo.SelectedIndex = selectedIndex;
}
base.OnLoad(e);
}
public static int ChangeResolution(int width, int height)
{
DEVMODE dm = GetDevMode1();
if (User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm))
{
dm.dmPelsWidth = width;
dm.dmPelsHeight = height;
int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
if (iRet == User_32.DISP_CHANGE_FAILED)
{
return(-1);
}
else
{
iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
switch (iRet)
{
case User_32.DISP_CHANGE_SUCCESSFUL:
{
return(0);
}
case User_32.DISP_CHANGE_RESTART:
{
return(1);
}
default:
{
return(-1);
}
}
}
}
else
{
return(-1);
}
}
public static int ChangeResolution(int Width, int Height)
{
Screen screen = Screen.PrimaryScreen;
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
if (User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm) == 0)
{
return(User_32.DISP_CHANGE_FAILED);
}
dm.dmPelsWidth = Width;
dm.dmPelsHeight = Height;
int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
if (iRet == User_32.DISP_CHANGE_FAILED)
{
return(iRet);
}
else
{
/*
* Thats good article, it gave me some initial knowledge and the direction of further searching.
* There is some useful tip that I have encountered while writing my own application:
* You can use another constant CDS_FULLSCREEN = 0x04 instead of CDS_UPDATEREGISTRY = 0x01 when changing resolution:
* [code] User_32.ChangeDisplaySettings(ref dm, User_32.CDS_FULLSCREEN); [/code]
* This gives you some benefits: resolution is changed temporally, you even do not need to restore previous settings - it is done automatically when the application exits. And, this doesn't disorder the icons - the desktop is not even affected.
* I used this in writing a small game that run in full screen - form was covering the whole screen (automatically covering taskbar).
* Maybe this information can help someone else too.
*/
return(User_32.ChangeDisplaySettings(ref dm, User_32.CDS_FULLSCREEN));
//return User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
}
}
public void setSupportedResolution(DEVMODE1 dm)
{
int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
if (iRet == User_32.DISP_CHANGE_FAILED)
{
Console.WriteLine("Unable to process your request");
Console.WriteLine("Description: Unable To Process Your Request. Sorry For This Inconvenience.");
}
else
{
iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
switch (iRet)
{
case User_32.DISP_CHANGE_SUCCESSFUL:
{
break;
//successfull change
}
case User_32.DISP_CHANGE_RESTART:
{
Console.WriteLine("Description: You Need To Reboot For The Change To Happen.\n If You Feel Any Problem After Rebooting Your Machine\nThen Try To Change Resolution In Safe Mode.");
break;
//windows 9x series you have to restart
}
default:
{
Console.WriteLine("Description: Failed To Change The Resolution.");
break;
//failed to change
}
}
}
}
