cbSize: UINT = @sizeOf(WNDCLASSEXW),
style: UINT,
lpfnWndProc: WNDPROC,
cbClsExtra: i32 = 0,
cbWndExtra: i32 = 0,
hInstance: HINSTANCE,
hIcon: ?HICON,
hCursor: ?HCURSOR,
hbrBackground: ?HBRUSH,
lpszMenuName: ?[*:0]const u16,
lpszClassName: [*:0]const u16,
hIconSm: ?HICON,