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);
}
}
}
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 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);
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)
{
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);
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.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
break;
}
}
}
}
}
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;
}
}
}
}
}
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
}
}
}
}