asked on

OWL/DLL/COM printing problem

I have developed an ActiveX, COM based DLL as a component to medical billing systems. The component includes interface functions which get and send back information and functions which display dialogs for information and selection. Everything works fine except printing. In some of the dialogs I allow the user to choose 'Print' to print certain list box information. However, when I choose Print the "Print Setup" dialog appears and works with no problem. The TPrintout seems to be built with no problems. But, when the DLL actually attempts to print the dialog closes down and I am brought directly back to the calling program.

Some Facts:
1. Using Borland C++ 5.2
2. I am able to print from the EXE program.
3. I am positive TPrintout is not the problem since I have tried simplifying it to just 1 or two lines of text but get the same print problem.

Thanks for any help,
Greg Marston, Unicor Medical

Tommy Hui

Is this 16bit or 32bit?

gmarston

ASKER

32bit.

kralubo

Did you load in your DLL the (Print) Windows Common Controls (in your exe they may be linked automatically)?

gmarston

ASKER

I'm guessing you mean the file owl/printer.h? If so, the answer is no and I'm feeling pretty stupid. I'll try this out asap and let you know. Thanks

gmarston

ASKER

Ignore the previous comment from me. I'm not sure if I loaded the Print common controls in the DLL. How do I determine this?

kjetilr

Did you remember to include the printer.rc file? This is a bit important in OWL.

gmarston

ASKER

Here's a snippet of the relevant code. The fact that
"Printer->Setup(this)" works should mean the window's print controls are all there for owl. Correct?

TPrinter *Printer;

Printer = new TPrinter;

....called from a dialog (from DLL) when user selects print:

if (Printer) {
DListPrintout po((char *)m_lbdata[m_current].notes1.c_str(),
m_listbox, Printer);
// TPrintout derived class, same class works,
// with EXE but not in DLL.

message((char *)po.GetTitle());
// this works fine, po is okay

Printer->Setup(this);
// a test to see if Printer is brings up
// dialog and correct default
// printer (should mean everything okay)

Printer->Print(this, po, TRUE);
// 1. brings up Print dialog to select
// different printer.
// 2. SetPrintParams is called because
// message is displayed
// 3. nothing prints and component dialog
// closes, returns to calling .exe

Thanks for any help,
Greg

ASKER CERTIFIED SOLUTION

AlexVirochovsky

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