private static IntPtr _WndProc(IntPtr hwnd, Standard.WM msg, IntPtr wParam, IntPtr lParam)
{
IntPtr zero = IntPtr.Zero;
Standard.MessageWindow target = null;
if (msg == Standard.WM.CREATE)
{
Standard.CREATESTRUCT createstruct = (Standard.CREATESTRUCT)Marshal.PtrToStructure(lParam, typeof(Standard.CREATESTRUCT));
target = (Standard.MessageWindow)GCHandle.FromIntPtr(createstruct.lpCreateParams).Target;
s_windowLookup.Add(hwnd, target);
}
else if (!s_windowLookup.TryGetValue(hwnd, out target))
{
return(Standard.NativeMethods.DefWindowProc(hwnd, msg, wParam, lParam));
}
Standard.WndProc proc = target._wndProcCallback;
if (proc != null)
{
zero = proc(hwnd, msg, wParam, lParam);
}
else
{
zero = Standard.NativeMethods.DefWindowProc(hwnd, msg, wParam, lParam);
}
if (msg == Standard.WM.NCDESTROY)
{
target._Dispose(true, true);
GC.SuppressFinalize(target);
}
return(zero);
}
public MessageWindow(Standard.CS classStyle, Standard.WS style, Standard.WS_EX exStyle, Rect location, string name, Standard.WndProc callback)
{
this._wndProcCallback = callback;
this._className = "MessageWindowClass+" + Guid.NewGuid().ToString();
Standard.WNDCLASSEX lpwcx = new Standard.WNDCLASSEX {
cbSize = Marshal.SizeOf(typeof(Standard.WNDCLASSEX)),
style = classStyle,
lpfnWndProc = s_WndProc,
hInstance = Standard.NativeMethods.GetModuleHandle(null),
hbrBackground = Standard.NativeMethods.GetStockObject(Standard.StockObject.NULL_BRUSH),
lpszMenuName = "",
lpszClassName = this._className
};
Standard.NativeMethods.RegisterClassEx(ref lpwcx);
GCHandle handle = new GCHandle();
try
{
handle = GCHandle.Alloc(this);
IntPtr lpParam = (IntPtr)handle;
this.Handle = Standard.NativeMethods.CreateWindowEx(exStyle, this._className, name, style, (int)location.X, (int)location.Y, (int)location.Width, (int)location.Height, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, lpParam);
}
finally
{
handle.Free();
}
}
