WeChat File Sender

Send files via Windows WeChat desktop client by automating window control, clipboard, and keyboard input using Node.js and PowerShell scripts.

Send files via Windows WeChat client using RPA automation. No external dependencies — pure PowerShell + Windows Automation API.

Security: filePath must be an absolute path. contactName is validated to 50 chars max, Chinese/alphanumeric/underscore/space only. No network calls, no data exfiltration.

Setup

Requirements: Windows OS with WeChat desktop client installed.

text

clawhub install wechat-file-sender --dir <your-skills-dir>

Usage

Command line

bash

node scripts/send-file-to-wechat.js "<filePath>" "<contactName>"

OpenClaw trigger phrases

• 向wechat发送文件给[联系人]：文件路径
• 发微信文件给[联系人]：文件路径

PowerShell Script Source (scripts/send-file.ps1)

Full source — audit it before running:

powershell

param(
    [string]$filePath,
    [string]$contactName
)

Add-Type -AssemblyName UIAutomationClient
Add-Type -AssemblyName UIAutomationTypes
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName PresentationCore

# Step 0: Check file exists
if (-not (Test-Path $filePath)) {
    Write-Host "[ERROR] File not found"
    exit 1
}

# Step 1: Find WeChat window (class Qt51514QWindowIcon)
$root = [System.Windows.Automation.AutomationElement]::RootElement
$allWindows = $root.FindAll([System.Windows.Automation.TreeScope]::Children,
    (New-Object System.Windows.Automation.PropertyCondition(
        [System.Windows.Automation.AutomationElement]::ControlTypeProperty,
        [System.Windows.Automation.ControlType]::Window)))

$wechatWindow = $null
foreach ($w in $allWindows) {
    if ($w.Current.ClassName -match 'Qt51514QWindowIcon') {
        $wechatWindow = $w
        break
    }
}

if (-not $wechatWindow) {
    Write-Host "[ERROR] WeChat not found"
    exit 1
}

# Win32 API for window focus
Add-Type @"
using System;
using System.Runtime.InteropServices;
public class WinAPI {
    [DllImport("user32.dll")]
    public static extern bool SetForegroundWindow(IntPtr hWnd);
    [DllImport("user32.dll")]
    public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
    [DllImport("user32.dll")]
    public static extern bool IsIconic(IntPtr hWnd);
    public const int SW_MINIMIZE = 6;
    public const int SW_RESTORE = 9;
}
"@

$hwnd = [IntPtr]$wechatWindow.Current.NativeWindowHandle
if ([WinAPI]::IsIconic($hwnd)) {
    [WinAPI]::ShowWindow($hwnd, [WinAPI]::SW_RESTORE)
}
[WinAPI]::SetForegroundWindow($hwnd)
Start-Sleep 1

# Step 2: Open search (Ctrl+F)
[System.Windows.Forms.SendKeys]::SendWait("^f")
Start-Sleep 1

# Step 3: Type contact name (via clipboard — SendKeys can't type Chinese)
[System.Windows.Forms.Clipboard]::Clear()
Start-Sleep 0.3
[System.Windows.Forms.Clipboard]::SetText($contactName)
Start-Sleep 0.5
[System.Windows.Forms.SendKeys]::SendWait("^v")
Start-Sleep 2

# Step 4: Select first result and enter chat
[System.Windows.Forms.SendKeys]::SendWait("{UP}")
Start-Sleep 0.5
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
Start-Sleep 1

# Step 5: CLIPBOARD ACTIVATION TRICK
# When staying in the same window, clipboard may not activate.
# Minimize -> set clipboard -> restore = clipboard activates
[WinAPI]::ShowWindow($hwnd, [WinAPI]::SW_MINIMIZE)
Start-Sleep 0.5

$fc = New-Object System.Collections.Specialized.StringCollection
$fc.Add((Resolve-Path $filePath))
[System.Windows.Forms.Clipboard]::Clear()
Start-Sleep 0.5
[System.Windows.Forms.Clipboard]::SetFileDropList($fc)
Start-Sleep 1

[WinAPI]::ShowWindow($hwnd, [WinAPI]::SW_RESTORE)
Start-Sleep 0.5
[WinAPI]::SetForegroundWindow($hwnd)
Start-Sleep 0.5

# Step 6: Paste and send
[System.Windows.Forms.SendKeys]::SendWait("^v")
Start-Sleep 1
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
Write-Host "[OK] File sent to: $contactName"

Key Implementation Notes

• ExecutionPolicy Bypass is required — PowerShell blocks .ps1 scripts by default. Bypass only affects this specific script file, not system policy.
• No admin needed — uses only user-level Win32 APIs (SetForegroundWindow, ShowWindow) and Windows Automation API.
• Clipboard activation trick — solves the Windows clipboard issue when source and target are the same window.
• Contact name via clipboard — SendKeys cannot type Chinese characters; workaround is to copy to clipboard and Ctrl+V.