Solved

DeviceCapabilities() buffer

Posted on 2002-06-18
3
391 Views
Last Modified: 2013-11-20
Hi,
I have the following problem.I'm using DeviceCapabilities() to get the paper and tray names a printer supports. However, I can't figure out how to decipher the buffer I get. Could anyone give me a sample code?

Thanks in advance
0
Comment
Question by:ICR
3 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 7089373
Check out http://support.microsoft.com/default.aspx?scid=kb;EN-US;q81245 ("DeviceCapabilities Function Sample Code (Q81245)")
0
 

Author Comment

by:ICR
ID: 7089563
The information here is about how to use the function.I already know that. What I'm asking about, however, is how to use the buffer with the names of the papers/bins I receive - how to separate the names of the papers/bins from the single string I receive.
0
 
LVL 32

Accepted Solution

by:
jhance earned 45 total points
ID: 7089851
It seems pretty straightforward.  The SDK docs say about this:

"Retrieves the names of the printer's paper bins. The pOutput buffer receives an array of string buffers. Each string buffer is 24 characters long and contains the name of a paper bin. The return value indicates the number of entries in the array. The name strings are null-terminated unless the name is 24 characters long. If pOutput is NULL, the return value is the number of bin entries required."

So you have an array of N strings, all NULL terminated and starting 24 characters apart.  The function returns how many there are.

So basically you could do:

char r[25];

DWORD dwCount = DeviceCapabilities(etc...);
if(dwCount != 0xFFFFFFFF){
  p = pBuffer;
  for(DWORD i=0; i<dwCount; i++){
    memset(r, 0, 25);
    memcpy(r, p, 24);
    AfxMessageBox(r, MB_OK);
    p += 24;
  }
}
else{
  // ERROR!!!
}
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Best tools for Backup and restore of Wordpress site 6 57
How to convert MFC::CString to UTF8 wchar_t* 10 209
Thin secure Windows 10 5 97
Problem to App source 6 40
Here is how to use MFC's automatic Radio Button handling in your dialog boxes and forms.  Beginner programmers usually start with a OnClick handler for each radio button and that's just not the right way to go.  MFC has a very cool system for handli…
Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question