feat(demos): update demos

source/demos/registry.ts

@@ -5,7 +5,9 @@
  */
 import {
     RegOpenKeyEx, RegQueryInfoKey, RegEnumKeyEx, RegEnumValue, RegCloseKey,
-    type HKEY
+    isHandle,
+    type HKEY,
+    isErrorStatus,
 } from 'libwin32'
 import { HKEY_, KEY_ } from 'libwin32/consts'
 
@@ -13,30 +15,32 @@ function QueryKey(hKey: HKEY) {
 
     // Get the class name and the value count.
     const info = RegQueryInfoKey(hKey)
-    if (typeof info === 'object') {
+    if (isErrorStatus(info))
+        return
 
-        // Enumerate the subkeys, until RegEnumKeyEx fails.
-        console.log('Number of subkeys: %d', info.subKeys)
-        for (let i = 0; i < info.subKeys; i++) {
-            const key = RegEnumKeyEx(hKey, i)
-            if (typeof key === 'object') {
-                console.log('(%d) %s', i + 1, key.name)
-            }
+    // Enumerate the subkeys, until RegEnumKeyEx fails.
+    console.log('Number of subkeys: %d', info.subKeys)
+    for (let i = 0; i < info.subKeys; i++) {
+        const key = RegEnumKeyEx(hKey, i)
+        if (typeof key === 'object') {
+            console.log('(%d) %s', i + 1, key.name)
         }
+    }
 
-        // Enumerate the key values.
-        console.log('Number of values: %d', info.values)
-        for (let i = 0; i < info.values; i++) {
-            const value = RegEnumValue(hKey, i)
-            if (typeof value === 'object') {
-                console.log('(%d) %s', i + 1, value.name)
-            }
+    // Enumerate the key values.
+    console.log('Number of values: %d', info.values)
+    for (let i = 0; i < info.values; i++) {
+        const value = RegEnumValue(hKey, i)
+        if (isErrorStatus(value)) {
+        }
+        else {
+            console.log('(%d) %s', i + 1, value.name)
         }
     }
 }
 
 const hTestKey = RegOpenKeyEx(HKEY_.CURRENT_USER, "SOFTWARE\\Microsoft", 0, KEY_.READ)
-if (typeof hTestKey === 'object') {
+if (isHandle<HKEY>(hTestKey)) {
     QueryKey(hTestKey)
     RegCloseKey(hTestKey)
 }