/
main.rs
51 lines (41 loc) · 1.61 KB
/
main.rs
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use windows::{core::*, Win32::Foundation::*, Win32::Graphics::Gdi::ValidateRect, Win32::System::LibraryLoader::GetModuleHandleA, Win32::UI::WindowsAndMessaging::*};
fn main() -> Result<()> {
unsafe {
let instance = GetModuleHandleA(None);
debug_assert!(instance.0 != 0);
let window_class = "window";
let wc = WNDCLASSA {
hCursor: LoadCursorW(None, IDC_ARROW),
hInstance: instance,
lpszClassName: PSTR(b"window\0".as_ptr()),
style: CS_HREDRAW | CS_VREDRAW,
lpfnWndProc: Some(wndproc),
..Default::default()
};
let atom = RegisterClassA(&wc);
debug_assert!(atom != 0);
CreateWindowExA(Default::default(), window_class, "This is a sample window", WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, None, None, instance, std::ptr::null_mut());
let mut message = MSG::default();
while GetMessageA(&mut message, HWND(0), 0, 0).into() {
DispatchMessageA(&message);
}
Ok(())
}
}
extern "system" fn wndproc(window: HWND, message: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
unsafe {
match message as u32 {
WM_PAINT => {
println!("WM_PAINT");
ValidateRect(window, std::ptr::null());
LRESULT(0)
}
WM_DESTROY => {
println!("WM_DESTROY");
PostQuitMessage(0);
LRESULT(0)
}
_ => DefWindowProcA(window, message, wparam, lparam),
}
}
}