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- private static IntPtr WindowProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
- {
- switch (msg)
- {
- case 0x0024:
- WmGetMinMaxInfo(hwnd, lParam);
- handled = true;
- break;
- }
- return (IntPtr)0;
- }
- private static void WmGetMinMaxInfo(IntPtr hwnd, IntPtr lParam)
- {
- MINMAXINFO mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));
- int MONITOR_DEFAULTTONEAREST = 0x00000002;
- IntPtr monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
- if (monitor != IntPtr.Zero)
- {
- MONITORINFO monitorInfo = new MONITORINFO();
- GetMonitorInfo(monitor, monitorInfo);
- RECT rcWorkArea = monitorInfo.rcWork;
- 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);
- }
- [StructLayout(LayoutKind.Sequential)]
- public struct POINT
- {
- /// <summary>x coordinate of point.</summary>
- public int x;
- /// <summary>y coordinate of point.</summary>
- public int y;
- /// <summary>Construct a point of coordinates (x,y).</summary>
- public POINT(int x, int y)
- {
- this.x = x;
- this.y = y;
- }
- }
- [StructLayout(LayoutKind.Sequential)]
- public struct MINMAXINFO
- {
- public POINT ptReserved;
- public POINT ptMaxSize;
- public POINT ptMaxPosition;
- public POINT ptMinTrackSize;
- public POINT ptMaxTrackSize;
- };
- [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
- public class MONITORINFO
- {
- public int cbSize = Marshal.SizeOf(typeof(MONITORINFO));
- public RECT rcMonitor = new RECT();
- public RECT rcWork = new RECT();
- public int dwFlags = 0;
- }
- [StructLayout(LayoutKind.Sequential, Pack = 0)]
- public struct RECT
- {
- public int left;
- public int top;
- public int right;
- public int bottom;
- public static readonly RECT Empty = new RECT();
- public int Width { get { return Math.Abs(right - left); } }
- public int Height { get { return bottom - top; } }
- public RECT(int left, int top, int right, int bottom)
- {
- this.left = left;
- this.top = top;
- this.right = right;
- this.bottom = bottom;
- }
- public RECT(RECT rcSrc)
- {
- left = rcSrc.left;
- top = rcSrc.top;
- right = rcSrc.right;
- bottom = rcSrc.bottom;
- }
- public bool IsEmpty { get { return left >= right || top >= bottom; } }
- public override string ToString()
- {
- if (this == Empty) { return "RECT {Empty}"; }
- return "RECT { left : " + left + " / top : " + top + " / right : " + right + " / bottom : " + bottom + " }";
- }
- public override bool Equals(object obj)
- {
- if (!(obj is Rect)) { return false; }
- return (this == (RECT)obj);
- }
- /// <summary>Return the HashCode for this struct (not garanteed to be unique)</summary>
- public override int GetHashCode() => left.GetHashCode() + top.GetHashCode() + right.GetHashCode() + bottom.GetHashCode();
- /// <summary> Determine if 2 RECT are equal (deep compare)</summary>
- public static bool operator ==(RECT rect1, RECT rect2) { return (rect1.left == rect2.left && rect1.top == rect2.top && rect1.right == rect2.right && rect1.bottom == rect2.bottom); }
- /// <summary> Determine if 2 RECT are different(deep compare)</summary>
- public static bool operator != (RECT rect1, RECT rect2) { return !(rect1 == rect2); }
- }
- [DllImport("user32")]
- internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);
- [DllImport("User32")]
- internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
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