Function flo_render_gl_offscreen::winapi::um::winuser::CallWindowProcW

pub unsafe extern "system" fn CallWindowProcW(
    lpPrevWndFunc: Option<unsafe extern "system" fn(_: *mut HWND__, _: u32, _: usize, _: isize) -> isize>,
    hWnd: *mut HWND__,
    Msg: u32,
    wParam: usize,
    lParam: isize
) -> isize