public Window(string title, int width, int height)
{
var instance = Kernel32.GetModuleHandleW(null);
var icon = User32.LoadIconW(IntPtr.Zero, IDI.APPLICATION);
wndproc = WndProc;
// register the window class
var wndclass = new WNDCLASSEXW {
cbSize = (uint)Marshal.SizeOf <WNDCLASSEXW>(),
style = CS.HREDRAW | CS.VREDRAW | CS.OWNDC,
hInstance = instance,
hIcon = icon,
hIconSm = icon,
hCursor = User32.LoadCursorW(IntPtr.Zero, IDC.ARROW),
lpszClassName = ClassName,
lpfnWndProc = Marshal.GetFunctionPointerForDelegate(wndproc)
};
var atom = User32.RegisterClassExW(ref wndclass);
if (atom == 0)
{
throw new InvalidOperationException("Failed to register window class");
}
// size the client area appropriately
var styles = WS.OVERLAPPEDWINDOW;
var rect = new RECT {
left = 0, top = 0, right = width, bottom = height
};
if (User32.AdjustWindowRectEx(ref rect, styles, 0, 0))
{
width = rect.right - rect.left;
height = rect.bottom - rect.top;
}
// create the window
hwnd = User32.CreateWindowExW(
0,
new IntPtr(atom),
title,
styles,
CW.USEDEFAULT,
CW.USEDEFAULT,
width,
height,
IntPtr.Zero,
IntPtr.Zero,
instance,
IntPtr.Zero
);
if (hwnd == IntPtr.Zero)
{
throw new InvalidOperationException("Failed to create window");
}
}
public static extern ushort RegisterClassExW(ref WNDCLASSEXW lpwcx);