wechat-file-sender
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.
clawhub install wechat-file-sender --dir <your-skills-dir>Usage
Command line
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:
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
.ps1scripts 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.