Impossible to figure out "CreateProcess"

Hello,
I have been working on a project that uses Builder C++ with Windows 95\98. The program is to set up with Tabs, and on each tab there are several buttons. Each button is use with CreateProcess() that opens the called Dos program. The CreateProcess works fine opening the Dos program and I can go though the various menus. I have found out that the Dos program doesn't work correctly with the Com ports. To test this I have closed the C++ and dos program. I than went into Windows Explorer and opened the same Dos program. The Dos program works fine this way. Why doesn't the Dos program com ports work correctly from CreateProcess(). I have read that Windows blocks this and I require a Stub that will redirect the Dos program or something like that. I guess my question is how can I open the Dos program without Windows giving me this problem. Can someone Please give me Help on this? I've been trying to figure this out for Weeks without luck. I even tried to Call a Batch File from CreateProcess which than Call the Dos program. This worked to a point. Once I closed the Dos program, the com ports stayed opened. I look forward in hearing from you.

Things I tried:
ShellExecuteEX().
Spawnlp().
CreateProcess().
Batch File.

Thanks
Clinton
 
This is one of the CreateProcess I tried:

void __fastcall TFormMain::ButtonAdj10Click(TObject *Sender)
{
 STARTUPINFO si;
 PROCESS_INFORMATION pi;

 memset (&pi, 0, sizeof(pi));
 memset (&si, 0, sizeof(si));

 si.cb = sizeof(si);
 si.dwFlags |=STARTF_USESHOWWINDOW;
 si.wShowWindow|=SW_SHOWNORMAL;

 if ( ! CreateProcess(
            NULL,
            "C:\\Hi-Tech Software\\JCM\\WBA\\Adj\\adj10.bat",
            NULL,
            NULL,
            false,
            NORMAL_PRIORITY_CLASS,
            NULL,
            NULL,
            &si,
            &pi))
            {
            MessageBox(0, "Could not execte program \n Please contact software author.", "Error", MB_ICONSTOP);
            }
    {
    CloseHandle(&pi.hProcess);
    CloseHandle(&pi.hThread);
    }
}
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