update

Cargo.toml

@@ -3,15 +3,21 @@ name = "raw-printer"
 description = "Direct RAW printing on windows or linux"
 repository = "https://github.com/mushonnip/raw-printer"
 keywords = ["printer"]
-version = "0.1.2"
+version = "0.1.3"
 edition = "2021"
 license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dependencies]
-windows = { version = "0.51.1", features = [
+[target.'cfg(windows)'.dependencies]
+windows = { version = "0.58.0", features = [
     "Win32_Foundation",
     "Win32_Graphics_Printing",
     "Win32_Graphics_Gdi",
-] }
+]}
+
+[profile.release]
+opt-level = 3
+lto = true
+codegen-units = 1
+strip = "symbols"

src/lib.rs

@@ -61,7 +61,7 @@ pub fn write_to_device(printer: &str, payload: &str) -> Result<usize, std::io::E
     };
 
     let printer_name = CString::new(printer).unwrap_or_default(); // null-terminated string
-    let mut printer_handle: HANDLE = HANDLE(0);
+    let mut printer_handle: HANDLE = HANDLE(std::ptr::null_mut());
 
     // Open the printer
     unsafe {
@@ -110,8 +110,8 @@ pub fn write_to_device(printer: &str, payload: &str) -> Result<usize, std::io::E
             }
 
             // End the page and document
-            EndPagePrinter(printer_handle);
-            EndDocPrinter(printer_handle);
+            let _ = EndPagePrinter(printer_handle);
+            let _ = EndDocPrinter(printer_handle);
             let _ = ClosePrinter(printer_handle);
             return Ok(bytes_written as usize);
         } else {