🚀 go-pugleaf

Alright so... I am running into a problem that is holding me back from 
writing the rest of my application. I have tried to find information on this 
error but it seems that I cannnot. Im making something like this:

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
HANDLE ThreadA, ThreadB;
//---------------------------------------------------------------------------
DWORD WINAPI Thread1(LPVOID Param);
DWORD WINAPI Thread2(LPVOID Param);
//---------------------------------------------------------------------------
DWORD WINAPI Thread2(LPVOID Param)
{
 //code here
 ShowMessage("test2");
 //terminate Thread
 TerminateThread(Thread, false);
 return 0;
}
//---------------------------------------------------------------------------
DWORD WINAPI Thread1(LPVOID Param)
{
 //code here
 ShowMessage("test");
 //terminatethread
 TerminateThread(Thread, false);
 return 0;
}
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
 : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
 //initialize the thread
 DWORD Id;
 Thread = CreateThread(0, 0, ThreadA, Form1->Handle, CREATE_SUSPENDED, &Id);
 ResumeThread(Thread);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
 //initialize the thread
 DWORD Id;
 Thread = CreateThread(0, 0, ThreadB, Form1->Handle, CREATE_SUSPENDED, &Id);
 ResumeThread(Thread);
}
//---------------------------------------------------------------------------

For example, all of my FTP work would be done in Thread1 and the Algorithm 
to deal with the files downloaded and populate a component that shows the 
users info on the latest applications would be done in Thread2. Here is my 
problem: When I actually add the full implementation into these threads, 
they crash the program on exit. What am I doing wrong? Is there some site 
for BCB that can help me? I just need to see an example of how a fully 
thread, working application works... The compiler error I get is Error 1400: 
Invalid Window Handle... I have had other people test this and yet it doesnt 
work on their end either... I have been pulling my hair for about a week... 
Any help would be greatly appreciated, as i'm trying to push this 
application out as an Alpha version in the next 2 weeks...