How to recursively search folders by using Visual C++

using <mscorlib.dll>
using namespace System;
using namespace System::IO;

String* directories[] = Directory::GetDirectories("C:\\");

String* files[] = Directory::GetFiles("C:\\", "*.dll");

 void DirSearch(String* sDir)
 {
 try
 {
 // Find the subfolders in the folder that is passed in.
 String* d[] = Directory::GetDirectories(sDir);
 int numDirs = d->get_Length();
 
 for (int i=0; i < numDirs; i++)
 {
 // Find all the files in the subfolder.
 String* f[] = Directory::GetFiles(d[i],textBox1->Text);
 int numFiles = f->get_Length();

 for (int j=0; j < numFiles; j++)
 {
 listBox1->Items->Add(f[j]);
 }
 DirSearch(d[i]);
 }
 }
 catch (System::Exception* e)
 {
 MessageBox::Show(e->Message);
 }
 }

// Form1.h
#pragma once

namespace RecursiveSearchCPP
{
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
using namespace System::IO;

/// <summary> 
/// Summary for Form1
///
/// WARNING: If you change the name of this class, you must change the 
///          Resource File Name property for the managed resource compiler tool 
///          that is associated with all .resx files that this class depends on.  Otherwise,
///          the designers will not be able to interact correctly with localized
///          resources that are associated with this form.
/// </summary>
public __gc class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
}
  
protected:
void Dispose(Boolean disposing)
{
// Form::Dispose(Disposing);
if (disposing && components)
{
components->Dispose();
}
__super::Dispose(disposing);
}
private: System::Windows::Forms::Label *  label1;
private: System::Windows::Forms::TextBox *  textBox1;
private: System::Windows::Forms::Label *  label2;
private: System::Windows::Forms::Button *  button1;
private: System::Windows::Forms::ListBox *  listBox1;
private: System::Windows::Forms::ComboBox *  comboBox1;

private:
/// <summary>
/// This is the required designer variable.
/// </summary>
System::ComponentModel::Container * components;

/// <summary>
/// This is the required method for Designer support. Do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->label1 = new System::Windows::Forms::Label();
this->textBox1 = new System::Windows::Forms::TextBox();
this->label2 = new System::Windows::Forms::Label();
this->button1 = new System::Windows::Forms::Button();
this->listBox1 = new System::Windows::Forms::ListBox();
this->comboBox1 = new System::Windows::Forms::ComboBox();
this->SuspendLayout();
// 
// label1
// 
this->label1->Location = System::Drawing::Point(8, 16);
this->label1->Name = S"label1";
this->label1->Size = System::Drawing::Size(144, 16);
this->label1->TabIndex = 5;
this->label1->Text = S"Search for files containing:";
// 
// textBox1
// 
this->textBox1->Location = System::Drawing::Point(8, 40);
this->textBox1->Name = S"textBox1";
this->textBox1->Size = System::Drawing::Size(120, 20);
this->textBox1->TabIndex = 4;
this->textBox1->Text = S"*.dll";
// 
// label2
// 
this->label2->Location = System::Drawing::Point(8, 96);
this->label2->Name = S"label2";
this->label2->Size = System::Drawing::Size(120, 23);
this->label2->TabIndex = 3;
this->label2->Text = S"Look in:";
// 
// button1
// 
this->button1->Location = System::Drawing::Point(608, 248);
this->button1->Name = S"button1";
this->button1->TabIndex = 0;
this->button1->Text = S"&Search";
this->button1->Click += new System::EventHandler(this, button1_Click);
// 
// listBox1
// 
this->listBox1->Location = System::Drawing::Point(152, 8);
this->listBox1->Name = S"listBox1";
this->listBox1->Size = System::Drawing::Size(530, 225);
this->listBox1->TabIndex = 1;
// 
// comboBox1
//
// Enlist all the network drives that are available on the computer.
//
String* p_logicalDrives[] = __gc new String*[];
comboBox1->Items->Clear();
p_logicalDrives = Directory::GetLogicalDrives();
        int numDrives = p_logicalDrives->get_Length();
for (int i=0; i< numDrives; i++)
{
comboBox1->Items->Add(p_logicalDrives[i]);
}
this->comboBox1->Location = System::Drawing::Point(8, 128);
this->comboBox1->Name = S"comboBox1";
this->comboBox1->Size = System::Drawing::Size(120, 25);
this->comboBox1->TabIndex = 2;
this->comboBox1->Text = S"C:\\";

// 
// Form1
// 
this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
this->ClientSize = System::Drawing::Size(688, 286);
this->Controls->Add(this->comboBox1);
this->Controls->Add(this->listBox1);
this->Controls->Add(this->button1);
this->Controls->Add(this->label2);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->label1);
this->Name = S"Form1";
this->Text = S"Form1";
this->ResumeLayout(false);

}

private: System::Void button1_Click(System::Object *  sender, System::EventArgs *  e)
 {
  //Clears the list box
  listBox1->Items->Clear();
  // You do not have option to change the values of the files to be searched
  // until the search is completed. Therefore, the value of the following is false.
  textBox1->Enabled = false;
  comboBox1->Enabled = false;

  button1->Text = S"Searching...";
  this->Cursor = Cursors::WaitCursor;
  Application::DoEvents();

  // Call the recursive search method.
  DirSearch(comboBox1->Text);
  button1->Text = S"Search";
  this->Cursor = Cursors::Default;
  
  // After the search is completed, the search criteria is enabled 
  // and you can add other search criteria to search the files recursively.
  textBox1->Enabled = true;
  comboBox1->Enabled = true;
 }

 void DirSearch(String* sDir)
 {
 try
 {
 // Find the subfolders in the folder that is passed in.
 String* d[] = Directory::GetDirectories(sDir);
 int numDirs = d->get_Length();
 
 for (int i=0; i < numDirs; i++)
 {
 // Find all the files in the subfolder.
 String* f[] = Directory::GetFiles(d[i],textBox1->Text);
 int numFiles = f->get_Length();

 for (int j=0; j < numFiles; j++)
 {
 listBox1->Items->Add(f[j]);
 }
 DirSearch(d[i]);
 }
 }
 catch (System::Exception* e)
 {
 System::Console::WriteLine(e->Message);
 }
 }
};
}

//Form1.cpp
#include "stdafx.h"
#include "Form1.h"
#include <windows.h>

using namespace RecursiveSearchCPP;

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
System::Threading::Thread::CurrentThread->ApartmentState = System::Threading::ApartmentState::STA;
Application::Run(new Form1());
return 0;
}