fix

README.md

@@ -70,8 +70,23 @@ windy-macros = "0.1.1"
 use windy::WStr;
 use windy_macros::wstr;
 
+#[allow(non_snake_case)]
+#[link(name = "user32")]
+extern "system" {
+    pub fn MessageBoxW(
+        hWnd: *mut c_void,
+        lpText: *const u16,
+        lpCaption: *const u16,
+        uType: u32,
+    ) -> i32;
+}
+
 fn main() {
-    let s: &WStr = wstr!("test");
+    let text: &WStr = wstr!("World");
+    let caption: &WStr = wstr!("CaptionW");
+    unsafe {
+        MessageBoxW(0 as _, text.as_ptr(), caption.as_ptr(), 0);
+    }
 }
 ```
 

examples/get_user_name.rs → examples/get_environment_variable.rs

@@ -7,7 +7,7 @@ use windy::*;
 #[cfg(feature = "std")]
 extern "system" {
     fn GetEnvironmentVariableA(
-        lpName: *const u8,
+        lpName: *const i8,
         lpBuffer: *mut u8,
         nSize: u32,
     ) -> u32;

examples/message_box.rs

@@ -0,0 +1,55 @@
+// Copyright takubokudori.
+// This source code is licensed under the MIT or Apache-2.0 license.
+use core::ffi::c_void;
+#[cfg(feature = "std")]
+use windy::*;
+
+#[allow(non_snake_case)]
+#[cfg(feature = "std")]
+#[link(name = "user32")]
+extern "system" {
+    pub fn MessageBoxA(
+        hWnd: *mut c_void,
+        lpText: *const i8,
+        lpCaption: *const i8,
+        uType: u32,
+    ) -> i32;
+
+    pub fn MessageBoxW(
+        hWnd: *mut c_void,
+        lpText: *const u16,
+        lpCaption: *const u16,
+        uType: u32,
+    ) -> i32;
+}
+
+#[cfg(feature = "std")]
+fn message_box_a() {
+    let text = AString::from_str("Hello").unwrap();
+    let caption = AString::from_str("CaptionA").unwrap();
+    unsafe {
+        MessageBoxA(0 as _, text.as_ptr(), caption.as_ptr(), 0);
+    }
+}
+
+#[cfg(feature = "std")]
+fn message_box_w() {
+    let text = WString::from_str("World").unwrap();
+    let caption = WString::from_str("CaptionW").unwrap();
+    unsafe {
+        MessageBoxW(0 as _, text.as_ptr(), caption.as_ptr(), 0);
+    }
+}
+
+#[cfg(feature = "std")]
+fn main() {
+    println!("*****message_box_a*****");
+    message_box_a();
+    println!("*****message_box_w*****");
+    message_box_w();
+}
+
+#[cfg(not(feature = "std"))]
+fn main() {
+    panic!("Use std feature!");
+}

src/string.rs

@@ -95,9 +95,6 @@ impl WString {
         }
     }
 
-    #[inline]
-    pub fn as_ptr(&self) -> *const u16 { self.inner.as_ptr() }
-
     /// Returns the length of bytes.
     #[inline]
     pub fn len(&self) -> usize { self.inner.len() }
@@ -367,10 +364,6 @@ impl AString {
         }
     }
 
-    /// Returns the `*const u8` pointer.
-    #[inline]
-    pub fn as_ptr(&self) -> *const u8 { self.inner.as_ptr() }
-
     /// Returns the length of bytes.
     #[inline]
     pub fn len(&self) -> usize { self.inner.len() }