static bool TryGetErrorMessage(uint error, StringBuilder sb, out string errorMsg)
{
errorMsg = "";
var flags = FormatMessageFlags.IGNORE_INSERTS
| FormatMessageFlags.ARGUMENT_ARRAY
| FormatMessageFlags.FROM_SYSTEM;
uint result = WinMethods.FormatMessage(flags, IntPtr.Zero, error, 0, sb, (uint)sb.Capacity + 1, null);
if (result != 0)
{
//remove trailing junk
int i = sb.Length;
while (i > 0)
{
char ch = sb[i - 1];
if (ch > 32 && ch != '.')
{
break;
}
i--;
}
errorMsg = sb.ToString(0, i);
}
else if (Marshal.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER)
{
return(false);
}
else
{
errorMsg = "Unknown error (0x" + Convert.ToString(error, 16) + ")";
}
return(true);
}
internal Screen(IntPtr monitor, IntPtr hdc)
{
IntPtr screenDC = hdc;
if (!multiMonitorSupport || monitor == (IntPtr)PRIMARY_MONITOR)
{
// Single monitor system
bounds = new Rectangle(new Point(0, 0), PrimaryMonitorSize);
primary = true;
deviceName = "DISPLAY";
}
else
{
var info = new MonitorInfoEx(); info.Init();
WinMethods.GetMonitorInfo(ToHR(monitor), ref info);
bounds = info.Monitor; //implicit conversion
primary = ((info.Flags & MONITORINFOF_PRIMARY) != 0);
deviceName = new string(info.DeviceName);
deviceName = deviceName.TrimEnd((char)0);
if (hdc == IntPtr.Zero)
{
screenDC = WinMethods.CreateDC(deviceName, null, null, IntPtr.Zero);
}
}
hmonitor = monitor;
this.bitDepth = WinMethods.GetDeviceCaps(ToHR(screenDC), DeviceCap.BITSPIXEL);
this.bitDepth *= WinMethods.GetDeviceCaps(ToHR(screenDC), DeviceCap.PLANES);
this.vRfresh = WinMethods.GetDeviceCaps(ToHR(screenDC), DeviceCap.VREFRESH);
this.pWidthMm = WinMethods.GetDeviceCaps(ToHR(screenDC), DeviceCap.HORZSIZE);
this.pHeightMm = WinMethods.GetDeviceCaps(ToHR(screenDC), DeviceCap.VERTSIZE);
if (hdc != screenDC)
{
WinMethods.DeleteDC(ToHR(screenDC));
}
}
static void InitScreens()
{
if (multiMonitorSupport)
{
MonitorEnumCallback closure = new MonitorEnumCallback();
WinMethods.EnumMonitorsDelegate proc = new WinMethods.EnumMonitorsDelegate(closure.Callback);
WinMethods.EnumDisplayMonitors(NullHandleRef, IntPtr.Zero, proc, IntPtr.Zero);
if (closure.ScreenList.Count > 0)
{
Screen[] temp = new Screen[closure.ScreenList.Count];
closure.ScreenList.CopyTo(temp, 0);
screens = temp;
}
else
{
screens = new Screen[] { new Screen((IntPtr)PRIMARY_MONITOR) };
}
}
else
{
screens = new Screen[] { new Screen((IntPtr)PRIMARY_MONITOR, IntPtr.Zero) };
}
}
