/// <summary>
/// Gets the bounds of the monitor that contains the defined window
/// </summary>
/// <param name="windowHandle">The handle of the window displayed by the monitor</param>
/// <returns>
/// Returns the bounds of the monitor. Returns null if window is not on any monitor.
/// </returns>
public static Rect?GetMonitorBounds(IntPtr windowHandle)
{
var monitor = UnsafeNative.MonitorFromWindow(windowHandle, MonitorOptions.MONITOR_DEFAULTTONULL);
if (monitor != IntPtr.Zero)
{
UnsafeNative.MONITORINFO monitorInfo = new UnsafeNative.MONITORINFO();
UnsafeNative.GetMonitorInfo(monitor, monitorInfo);
UnsafeNative.RECT rcWorkArea = monitorInfo.rcWork;
UnsafeNative.RECT rcMonitorArea = monitorInfo.rcMonitor;
return(new Rect(rcMonitorArea.left, rcMonitorArea.top, Math.Abs(rcMonitorArea.left - rcMonitorArea.right), Math.Abs(rcMonitorArea.bottom - rcMonitorArea.top)));
}
return(null);
}
/// <summary>
/// Sent to a window when the size or position of the window is about to change. An
/// application can use this message to override the window's default maximized size and
/// position, or its default minimum or maximum tracking size.
/// </summary>
/// <param name="windowHandle">The handle of the window displayed by the monitor</param>
/// <param name="lParam">Additional message-specific information</param>
public static void WmGetMinMaxInfo(IntPtr windowHandle, IntPtr lParam)
{
var mmi = (UnsafeNative.MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(UnsafeNative.MINMAXINFO));
// Adjust the maximized size and position to fit the work area of the correct monitor
var monitor = UnsafeNative.MonitorFromWindow(windowHandle, MonitorOptions.MONITOR_DEFAULTTONEAREST);
if (monitor != System.IntPtr.Zero)
{
UnsafeNative.MONITORINFO monitorInfo = new UnsafeNative.MONITORINFO();
UnsafeNative.GetMonitorInfo(monitor, monitorInfo);
UnsafeNative.RECT rcWorkArea = monitorInfo.rcWork;
UnsafeNative.RECT rcMonitorArea = monitorInfo.rcMonitor;
mmi.ptMaxPosition.x = Math.Abs(rcWorkArea.left - rcMonitorArea.left);
mmi.ptMaxPosition.y = Math.Abs(rcWorkArea.top - rcMonitorArea.top);
mmi.ptMaxSize.x = Math.Abs(rcWorkArea.right - rcWorkArea.left);
mmi.ptMaxSize.y = Math.Abs(rcWorkArea.bottom - rcWorkArea.top);
}
Marshal.StructureToPtr(mmi, lParam, true);
}