diff --git a/interface/src/utils.ts b/interface/src/utils.ts
new file mode 100644
index 0000000..2ced547
--- /dev/null
+++ b/interface/src/utils.ts
@@ -0,0 +1,31 @@
+export function chooseFile(setter: (value: string) => void, cancel?: () => void)
+{
+    window.saucer.call("choose-path", []).then(result =>
+    {
+        if (result)
+        {
+            setter(result);
+            return;
+        }
+
+        if (!cancel)
+        {
+            return;
+        }
+
+        cancel();
+    });
+}
+
+export function chooseFolder(setter: (value: string) => void)
+{
+    window.saucer.call("choose-folder", []).then(result =>
+    {
+        if (!result)
+        {
+            return;
+        }
+
+        setter(result);
+    });
+}
diff --git a/interface/types/global.d.ts b/interface/types/global.d.ts
index 8e87caf..3726512 100644
--- a/interface/types/global.d.ts
+++ b/interface/types/global.d.ts
@@ -4,21 +4,22 @@ interface Window
     {
         call:
         {
-            (func: "load", args: [string: path]): Promise<void>;
+            (func: "load", args: [string: path]): Promise<boolean | string>;
 
             (func: "list", args: []): Promise<string[]>;
             (func: "decompile", args: [string: name]): Promise<string>;
 
             (func: "cancel", args: []): Promise<void>;
-            (func: "export", args: []): Promise<boolean>;
+            (func: "export", args: [string: path]): Promise<boolean>;
 
-            (func: "java-path", args: []): Promise<string>;
-            (func: "unluac-path", args: []): Promise<string>;
+            (func: "java-path", args: []): Promise<string?>;
+            (func: "unluac-path", args: []): Promise<string?>;
 
-            (func: "set-java-path", args: [string: path]): Promise<void>;
-            (func: "set-unluac-path", args: [string: path]): Promise<void>;
+            (func: "set-java-path", args: [string?: path]): Promise<void>;
+            (func: "set-unluac-path", args: [string?: path]): Promise<void>;
 
-            (func: "choose-path", args: []): Promise<string>;
+            (func: "choose-path", args: [string?: path]): Promise<string | null>;
+            (func: "choose-folder", args: [string?: path]): Promise<string | null>;
         };
     }