Elo TouchSystems MonitorMouse FOR WINDOWS NT Version 2.0 Guia do Utilizador descarregar pdf (Página 172)

Section 5. Example Applications

DWORD read_len=0;

char wbuff[1];

char* p;

while (!quit)

{

rs = ReadFile(drv_h, wbuff, sizeof(wbuff), &read_len, &ov_r);

if(!rs)

{

rs = GetLastError ();

if ( rs != ERROR_IO_PENDING)

{

printf("DeviceIOControl (Read) Error : %i (0x%x)\n", rs, rs );

break;

}

rs = WaitForSingleObject ( ov_r.hEvent, INFINITE);

rs = GetOverlappedResult (

drv_h, // handle of file, pipe, or communications device

&ov_r, // address of overlapped structure

&read_len, // address of actual bytes count

FALSE // wait flag

);

if (quit)

break;

if(rs)

{

p = wbuff;

while (read_len >0)

{

if (*p == 0x1a)

{

quit = TRUE;

printf("\n\nExiting Test...");

break;

}

putch (*p);

++p;

--read_len;

}

};

//endoffile

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Elo TouchSystems MonitorMouse FOR WINDOWS NT Version 2.0 Guia do Utilizador Página 172