Public delegate int MONITORENUMPROC(IntPtr param0, IntPtr param1, ref tagRECT param2, IntPtr param3) Public static extern bool EnumDisplayMonitors( IntPtr hdc, IntPtr lprcClip, MONITORENUMPROC lpfnEnum, Public static extern bool GetMonitorInfoW( IntPtr hMonitor, ref MonitorInfo lpmi) Public static extern IntPtr GetDC( IntPtr hWnd) Public static extern int ReleaseDC( IntPtr hWnd, IntPtr hDC) _dcs.Add(param1) // grab DC for current monitor ! If (!NativeMethods.GetMonitorInfoW(param0, ref info))

GammaRamp class : public void SetValue(byte value, IntPtr hdc) Gamma.SetValue(Convert.ToByte(value), monitors.DC) Private void trackBar1_Scroll(object sender, EventArgs e) Private void Form1_Load(object sender, EventArgs e) Public DisplayInfoCollection GetDisplays()ĭisplayInfoCollection col = new DisplayInfoCollection() ĮnumDisplayMonitors(IntPtr.Zero, IntPtr.Zero,ĭelegate (IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData)īool success = GetMonitorInfo(hMonitor, ref mi) ĭi.ScreenWidth = (mi.monitor.right - mi.monitor.left).ToString() ĭi.ScreenHeight = (mi.monitor.bottom - mi.monitor.top).ToString() Īnd for SetDeviceGammaRamp, i made this : GammaRamp gamma = new GammaRamp() / Returns the number of Displays using the Win32 functions Public class DisplayInfoCollection : List / The struct that contains the display information Static extern bool GetMonitorInfo(IntPtr hmon, ref MonitorInfo mi) Public static extern IntPtr GetDC(IntPtr hWnd) Public delegate int MonitorEnumProc(IntPtr hMonitor, IntPtr hDCMonitor, ref Rect lprcMonitor, IntPtr dwData) Static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr lprcClip, MonitorEnumProc lpfnEnum, IntPtr dwData) So, how can i change this code to put my gamma on my first screen, or my second, but not both I saw one weird thing : SetDeviceGammaRamp is not the same gamma of the Nvidia Panel Controller (I tried to change my value of SetDeviceGammaRamp, and it's like if i changed the value of brightness and contrast in the Nvidia panel). I try to change my gamma of just one screen and not all my screens.īut this SetDeviceGammaRamp(GetDC(IntPtr.Zero), ref s_ramp)

How to increase gamma