From 124f11bd6bd9425f57a8549782fe10c7760573e9 Mon Sep 17 00:00:00 2001
From: yu <191972707@qq.com>
Date: Thu, 5 Nov 2026 13:43:44 +0800
Subject: [PATCH] fix: Dialog_Notice/MsgBox MessageBox options arg - invalid
 HelpButton value

Previous topmost attempt passed 'HelpButton' in the MessageBoxOptions position of
MessageBox::Show, so PowerShell failed at runtime with "cannot convert value
HelpButton to type System.Windows.Forms.MessageBoxOptions" (reproduced in flow run:
notice node failed at char 196). Now passes the documented MB_TOPMOST flag
(MessageBoxOptions)262144 as the 6th argument, keeping the six-argument overload
(OK / Information / Button1 / topmost).
---
 packages/rpa-core/src/capabilities/desktop.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/rpa-core/src/capabilities/desktop.ts b/packages/rpa-core/src/capabilities/desktop.ts
index 6e7a828..77097e5 100644
--- a/packages/rpa-core/src/capabilities/desktop.ts
+++ b/packages/rpa-core/src/capabilities/desktop.ts
@@ -154,7 +154,9 @@ const notice: CapabilityHandler = async (_ctx, _node, args) => {
   // MessageBox 阻塞等用户点确定，同样不能吃 powershell() 默认 30s 超时；且 MB_TOPMOST 保证弹窗不被主窗口盖住
   const waitSeconds = number(args, ["wait_time", "waitTime", "timeout"], 600);
   const timeoutMs = Math.max(10000, Math.round(waitSeconds * 1000));
-  await powershell(`Add-Type -AssemblyName System.Windows.Forms; [System.Windows.Forms.MessageBox]::Show(${psString(content)},${psString(title)},'OK','Information','Button1','HelpButton',1) | Out-Null`, timeoutMs);
+  // MessageBoxOptions 第 6 参数用 MB_TOPMOST(0x40000=262144) 标志位实现置顶；此前误传 'HelpButton'（图标枚举值）
+  // 导致 PowerShell 类型转换失败「无法将 HelpButton 转换为 MessageBoxOptions」
+  await powershell(`Add-Type -AssemblyName System.Windows.Forms; [System.Windows.Forms.MessageBox]::Show(${psString(content)},${psString(title)},'OK','Information','Button1',[System.Windows.Forms.MessageBoxOptions]262144) | Out-Null`, timeoutMs);
   return true;
 };