Clear jet CX-one Manual do Utilizador descarregar pdf (Página 9)

CLEARjet GmbH CX-one

1.4.2 Sample Program

Use this or a similar program to proceed after printing (if the Windows driver was

used).

The following steps must be executed for requesting the printer status:

1. Create a handle of the printer with the function "OpenPrinter".

2. Check existing print jobs for the CLEARjet printer with the function

"EnumJobs"

3. This function returns the count of existing print jobs in the queue.

4. If the return value is "0" execution of printer commands (e.g. status requests)

is allowed.

Sample code:

============

HANDLE hPrinter;

// Open printer

if (OpenPrinter ("CX-one", &hPrinter, NULL))

{

while (true)

{

DWORD dwNeeded = 0;

DWORD dwReturned = 0;

// is there a printjob in the queue

if (EnumJobs (hPrinter, 0, 1, 1, NULL, 0, &dwNeeded,

&dwReturned))

{

// one or more jobs

if (dwNeeded == 0)

break;

else

Sleep (200);

}

// close printer

ClosePrinter (hPrinter);

// wait for data send via usb

Sleep (200);

}

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