$dllfile = gi unrar64.dll -ea stop

Add-Type -Type @"
using System;
using System.Runtime.InteropServices;

namespace PS
{
  public class Unrar
  { 
	[StructLayout(LayoutKind.Sequential)]
		public struct RAROpenArchiveDataEx
	{
		[MarshalAs(UnmanagedType.LPStr)]
		public string ArcName;

		[MarshalAs(UnmanagedType.LPWStr)]
		public string ArcNameW;

		public uint OpenMode;
		public uint OpenResult;

		[MarshalAs(UnmanagedType.LPStr)]
		public string CmtBuf;

		public uint CmtBufSize;
		public uint CmtSize;
		public uint CmtState;
		public uint Flags;

		public UNRARCallback Callback;
    		public uint UserData;

		[MarshalAs(UnmanagedType.ByValArray, SizeConst = 28)]
		public uint[] Reserved;

	}


	[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
		public struct RARHeaderDataEx
	{
		[MarshalAs(UnmanagedType.ByValTStr, SizeConst=512)]
		public string ArcName;

		[MarshalAs(UnmanagedType.ByValTStr, SizeConst=1024)]
		public string ArcNameW;

		[MarshalAs(UnmanagedType.ByValTStr, SizeConst=512)]
		public string FileName;

		[MarshalAs(UnmanagedType.ByValTStr, SizeConst=1024)]
		public string FileNameW;

		public uint Flags;
		public uint PackSize;
		public uint PackSizeHigh;
		public uint UnpSize;
		public uint UnpSizeHigh;
		public uint HostOS;
		public uint FileCRC;
		public uint FileTime;
		public uint UnpVer;
		public uint Method;
		public uint FileAttr;

		[MarshalAs(UnmanagedType.LPStr)]
		public string CmtBuf;

		public uint CmtBufSize;
		public uint CmtSize;
		public uint CmtState;

		public uint DictSize;
		public uint HashType;

		[MarshalAs(UnmanagedType.ByValTStr, SizeConst=16)]
		public string Hash;

		public uint RedirType;

		[MarshalAs(UnmanagedType.LPWStr)]
		public string RedirName;

		public uint RedirNameSize;
		public uint DirTarget;

		[MarshalAs(UnmanagedType.ByValArray, SizeConst=994)]
		public uint[] Reserved;
	}

	public delegate int UNRARCallback(uint msg, int UserData, IntPtr p1, int p2);

        //============================================================================================

	[DllImport(@"$dllfile")]
	public static extern IntPtr RAROpenArchiveEx(ref RAROpenArchiveDataEx archiveData);

	[DllImport(@"$dllfile")]
	public static extern int RARCloseArchive(IntPtr hArcData);

	[DllImport(@"$dllfile")]
	public static extern int RARReadHeaderEx(IntPtr hArcData, ref RARHeaderDataEx headerData);

	[DllImport(@"$dllfile")]
	public static extern int RARProcessFileW(IntPtr hArcData, int operation,
			[MarshalAs(UnmanagedType.LPWStr)] string destPath, 
			[MarshalAs(UnmanagedType.LPWStr)] string destName );

  }
}

"@

#=======================================================================================
$sb={ 
	param(	[uint32]$msg,
		[int32]$UserData,
		[IntPtr]$p1,
		[int32]$p2
	)

	switch ($msg)
	{
		1{
			[System.Runtime.InteropServices.Marshal]::Copy($p1,$buffer,$bufferPos,$p2)
			$script:bufferPos+=$p2
			return 1
		}

		3{
			$fn = [System.Runtime.InteropServices.Marshal]::PtrToStringUni($p1)
			  if ($p2 -eq 0)  {write-host "沒找到 $fn";return -1}
			  if ($p2 -eq 1)  {write-host "找到 $fn";return 1}
		}

		4{	
			$pass = read-host '請輸入密碼'
			$pass = [System.Text.Encoding]::Unicode.GetBytes($pass)
			[System.Runtime.InteropServices.Marshal]::Copy($pass,0,$p1,$pass.length)
			return 1
		}
	}
}
#=======================================================================================
[void][reflection.assembly]::LoadWithPartialName("System.Windows.Forms")

$form = new-object Windows.Forms.Form
$form.FormBorderStyle = [Windows.Forms.FormBorderStyle]::None
$form.WindowState=[Windows.Forms.FormWindowState]::Maximized


$pictureBox = new-object Windows.Forms.PictureBox
$pictureBox.Dock="Fill"
$pictureBox.SizeMode = [Windows.Forms.PictureBoxSizeMode]::Zoom

$form.controls.add($pictureBox)
$form.Add_Shown( { $form.Activate() } )
#===============================================================
$file = @(dir *.rar)[0]
if ($file -eq $null) {write-host '沒找到 rar';pause;exit}

#設定 $open
$open=new-object PS.Unrar+RAROpenArchiveDataEx
$open.ArcNameW=$file
$open.OpenMode=1
$open.Reserved=@(0)*28
$open.Callback=$sb

#開始 open
$handle=[PS.Unrar]::RAROpenArchiveEx([ref]$open)
if ( $open.OpenResult){write-host 'ERROR open';pause;exit}

#==============================================================
$nextP={
	#讀取 header
	$header = new-object PS.Unrar+RARHeaderDataEx

	while ($true) {
		$result = [PS.Unrar]::RARReadHeaderEx($handle,[ref]$header)
		#header讀取錯誤 or 所有header都讀完了
		if ( $result ){[PS.Unrar]::RARCloseArchive($handle);stop-process -Id $PID}

		#找 jpg png bmp 。 如果不是，就跳到下一個header
		if ($header.FileNameW -match '\.(jpg|png|bmp)$') { break} else {
		[PS.Unrar]::RARProcessFileW($handle,0,$null,$null)}

	}


	#解壓縮到$buffer
	$script:buffer=new-object byte[]($header.UnpSize)
	$script:bufferPos=0
	$result=[PS.Unrar]::RARProcessFileW($handle,1,$null,$null)

	#解壓縮錯誤
	if ( $result ){[PS.Unrar]::RARCloseArchive($handle);stop-process -Id $PID}

	
	$ms=new-object IO.MemoryStream($buffer,0,$buffer.length)
	$img = [System.Drawing.Image]::FromStream($ms)
	$pictureBox.Image = $img
	$ms.close()

}
#===================================================================================

$pictureBox.Add_Click($nextP)

& $nextP

[void]$form.ShowDialog()
复制代码