How to print and delete the printer's job

Hi All,

I am new to this forum and also to C++ program. I tried a program to send the jobs to the printer and to delete the jobs from the printer. For this I have used win32 API. But it doesn't work. I did this with the help of Borland builder. I have attached part of the code which would help you to find the solution. I need the solution soon since am in urgent.. Please help me with this concept.

Code:

long bufsize=0x100;
char *prnname = "Canon MF4320-4350";
char buf[ 300];
int temp = GetLastError();
char szData[512];
GetProfileStringA("Windows", "Device", ",,,",
prnname, bufsize);


HANDLE hPrinter;
if ( OpenPrinter("Canon MF4320-4350", &hPrinter, NULL) == 0 )
{
free(prnname);
ShowMessage("OpenPrinter call failed"); 

return 0;
}

DWORD dwBufsize=0;
DWORD dwBytesWritten=0;

DOC_INFO_1 DocInfo;

DocInfo.pDocName = "realfile.txt";
DocInfo.pOutputFile = NULL;
DocInfo.pDatatype = _T("RAW");


StartDocPrinter(hPrinter, 1, (LPBYTE)&DocInfo);
StartPagePrinter(hPrinter);


WritePrinter(hPrinter, (void*)szData, strlen(szData) , &dwBytesWritten);

GetPrinter(hPrinter, 2, NULL, 0, &dwBufsize);

PRINTER_INFO_2* pinfo = (PRINTER_INFO_2*)malloc(dwBufsize);
long result = GetPrinter(hPrinter, 2, 
(LPBYTE)pinfo, dwBufsize, &dwBufsize);

if ( pinfo->cJobs == 0 )
{
ShowMessage("No printer jobs found.");
sprintf( buf, "%d", temp);
Form1->RichEdit1->Lines->Add( buf);
}
else
{
if ( SetPrinter(hPrinter, 0, 0, PRINTER_CONTROL_PURGE) == 0 )
{
ShowMessage("SetPrinter call failed"); 
sprintf( buf, "%d", temp);
Form1->RichEdit1->Lines->Add( buf);
}
else
{
ShowMessage("Number of printer jobs deleted");
sprintf( buf,"%d", pinfo->cJobs);
Form1->RichEdit1->Lines->Add( buf);
free(pinfo);
free(prnname);
}
}

ClosePrinter( hPrinter );
free(pinfo);
free(prnname);

return 0;
}

First, you need an indent style which isn't NONE
Indent style - Wikipedia, the free encyclopedia

Second, with only one job in the queue, chances are it has already been sent to the printer and you're too late (especially if it's a small text file).

Try queuing several files and see if you can delete some of those.

You might also clarify "it doesn't work".
What are your actual observations / error messages.

It is compiling fine. But does nothing when I run this program. So if I need to print more files from particular folder say "D:\printer files" then what change should I make in this line of code. " DocInfo.pDocName = "realfile.txt"; "

I apologize for the wrong information in the previous reply. Once I compile the program and run the program it pops up the message box saying "SetPrinter call failed " after I hit the Button.

Read our FAQ on getting a list of files in a directory.

Then use a loop to pass each filename where you have your assignment.

Dunno - this seems like a very easy step compared to what you've done already.
Are you roaming the forums accumulating other peoples work without actually understanding anything which is going on?

I didn't understand what you saying. It shows the message box saying "SetPrinter call failed". So it is satisfying the condition " if ( SetPrinter(hPrinter, 0, 0, PRINTER_CONTROL_PURGE) == 0 ) ". But I need the else part of this condition to get executed. So please give me a solution for this.