alloc_console does work, but it create another cmd window, seems not

better than dialog

src/platform/windows.cc

@@ -628,4 +628,8 @@ extern "C"
         return bSystem;
     }
 
+    void alloc_console_and_redirect() {
+        AllocConsole();
+        freopen("CONOUT$", "w", stdout);
+    }
 } // end of extern "C"

src/platform/windows.rs

@@ -455,6 +455,7 @@ extern "C" {
     fn win_stop_system_key_propagate(v: BOOL);
     fn is_win_down() -> BOOL;
     fn is_local_system() -> BOOL;
+    fn alloc_console_and_redirect();
 }
 
 extern "system" {
@@ -2383,3 +2384,9 @@ pub fn message_box(text: &str) {
         .collect::<Vec<u16>>();
     unsafe { MessageBoxW(std::ptr::null_mut(), text.as_ptr(), caption.as_ptr(), MB_OK) };
 }
+
+pub fn alloc_console() {
+    unsafe {
+        alloc_console_and_redirect();
+    }
+}