console redirection

http://msdn.microsoft.com/en-us/library/ms682499(VS.85).aspx The MSDN sample project hooks into a application and redirects stdin and stdout to locally created handles connected to read/write pipes. If I run "cmd.exe" and I redirect the stdin and out to a local pipe then I can run commands from cmd.exe shell by sending them to the pipe. Every dos command runs fine exept the windows 32 applications. If I try to run "calc.exe" the process is being spawned (in taskman) but not shown on the desktop. Following code sends calc.exe to the console

void WriteToPipe(void) 
{ 
   DWORD dwRead, dwWritten; 
   CHAR chBuf[BUFSIZE];
   BOOL bSuccess = FALSE;
 
   WriteFile(g_hChildStd_IN_Wr, "calc.exe\r\n", 10, &dwWritten, NULL);
   for (;;) 
   { 
      bSuccess = ReadFile(g_hInputFile, chBuf, BUFSIZE, &dwRead, NULL);
      if ( ! bSuccess || dwRead == 0 ) break; 
      
      bSuccess = WriteFile(g_hChildStd_IN_Wr, chBuf, dwRead, &dwWritten, NULL);
      if ( ! bSuccess ) break; 
   } 
   if ( ! CloseHandle(g_hChildStd_IN_Wr) ) 
      ErrorExit(TEXT("StdInWr CloseHandle")); 
} 

If after sending the "calc.exe" trough the pipe I send another 3 pairs of CRLF in the same pipe then the calc.exe is being shown on the desktop. This happen with any GUI application.

void WriteToPipe(void) 
{ 
   DWORD dwRead, dwWritten; 
   CHAR chBuf[BUFSIZE];
   BOOL bSuccess = FALSE;
 
   WriteFile(g_hChildStd_IN_Wr, "calc.exe\r\n", 10, &dwWritten, NULL);

   WriteFile(g_hChildStd_IN_Wr, "\r\n", 2, &dwWritten, NULL);
   WriteFile(g_hChildStd_IN_Wr, "\r\n", 2, &dwWritten, NULL);
   WriteFile(g_hChildStd_IN_Wr, "\r\n", 2, &dwWritten, NULL); // calc is shown
   for (;;) 
   { 
      bSuccess = ReadFile(g_hInputFile, chBuf, BUFSIZE, &dwRead, NULL);
      if ( ! bSuccess || dwRead == 0 ) break; 
      
      bSuccess = WriteFile(g_hChildStd_IN_Wr, chBuf, dwRead, &dwWritten, NULL);
      if ( ! bSuccess ) break; 
   } 
   if ( ! CloseHandle(g_hChildStd_IN_Wr) ) 
      ErrorExit(TEXT("StdInWr CloseHandle")); 
} 

Also if I close the writing handle right away the GUII spwans on the desktop right away bu there is no more a handle to send any more commands...

void WriteToPipe(void) 
{ 
   DWORD dwRead, dwWritten; 
   CHAR chBuf[BUFSIZE];
   BOOL bSuccess = FALSE;
 
   WriteFile(g_hChildStd_IN_Wr, "calc.exe\r\n", 10, &dwWritten, NULL);
   CloseHandle(g_hChildStd_IN_Wr) ; // // calc is shown

Any ideas what the heck is this.