public MessageWindow(CS classStyle, WS style, WS_EX exStyle, Rect location, string name, WndProc callback)
{
// A null callback means just use DefWindowProc.
_wndProcCallback = callback;
_className = "MessageWindowClass+" + Guid.NewGuid();
var wc = new WNDCLASSEX
{
cbSize = Marshal.SizeOf(typeof(WNDCLASSEX)),
style = classStyle,
lpfnWndProc = SWndProc,
hInstance = NativeMethods.GetModuleHandle(null),
hbrBackground = NativeMethods.GetStockObject(StockObject.NULL_BRUSH),
lpszMenuName = "",
lpszClassName = _className
};
NativeMethods.RegisterClassEx(ref wc);
var gcHandle = default(GCHandle);
try
{
gcHandle = GCHandle.Alloc(this);
var pinnedThisPtr = (IntPtr)gcHandle;
Handle = NativeMethods.CreateWindowEx(
exStyle,
_className,
name,
style,
(int)location.X,
(int)location.Y,
(int)location.Width,
(int)location.Height,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
pinnedThisPtr);
}
finally
{
gcHandle.Free();
}
}
internal static short RegisterClassEx(ref WNDCLASSEX lpwcx)
{
var ret = _RegisterClassEx(ref lpwcx);
if (ret == 0)
{
HRESULT.ThrowLastError();
}
return ret;
}