Using foxitreader_ax.ocx with BCB6 crashes.

[deathaxe]

Hello guys,

I need PDF ability in my application in order to display help information. As I like Foxit Reader very much for its speed I wanted to use it in my application too.

I am using Borland C++ Builder 6. Using the "Import ActiveX" function from its main menu I installed the foxitreader activex control as a package. When adding the new component to a TForm object it is shown correctly, but as soon as I try to call OpenFile(...) from the source code, the operation fails with an access violation.

I compared the examples for foxit's api with the imported library code. Doing so I realized the following:
While strings in api examples are ANSI, Borland C++ Builder's import library uses UNICODE parameters.

May this be the reason?

Can anybody help me with this problem, pleeaaase?


My using code is:

Boolean TAlertHelp::OpenPdf(TWinControl* AOwner, const WideString& HelpFile)
{
...
FPdf = new TPdf(AOwner);
FPdf->Align = alClient;
FPdf->Parent = AOwner;
FPdf->Visible = True;
#ifdef ACROBAT_PDF
FPdf->src = HelpFile;
FPdf->setShowToolbar(False);
#else
FPdf->OpenFile(HelpFile, L""); // this is the crash causing line
FPdf->ShowTitleBar(False);
FPdf->ShowToolBar(False);
#endif
...
}

[william]

Hi Deathaxe,

Our developer has tested the OpenFile method under Unicode and found no problem.
Are you sure that you have configured your compiler to fully use Unicode?

[deathaxe]

Hmm, :1_07: ... is there an option for the compiler in borland c++ builder 6? I am using Tnt Delphi Controls to make my whole application unicode enabled.
The unicode using foxit classes were generated by borland automatically, so I was sure it handles them correctly using unicode strings for parameters. Putting the _UNICODE definition into the project's options page does not solve the problem. As I did not install any service packs for c++ builder (they are no longer available for german versions) and you proofed your library to work, I am sure the prolbem is caused by ****f...g borland itself. Which version of cüü builder did your tester use?

[Dunno118]

I installed it as a standard Active X control using the Import ActiveX control.

PDFView->OpenFile((WideString)s, WideString(""));

All of the other functions work as expected. Trying to write to the Read only properties of the control will cause it to crash though.

[william]

Hi Dunno118,

Your program should not write to Read only properties.