Linker Error using TFormatedObject.NumberFormat

[larry_bar56]

I'm using XLSReadWriteII3.0 with Borland C++ Builder 6.

I use

c = XLS->Sheets->Items[0]->Cell[col][2];

to get a cell reference but if I try:

c->NumberFormat;

the project will not link with the following error:

[Linker Error] Unresolved external '__fastcall Formattedobj2::TFormattedObject::GetNumberFormatA()' referenced from C:\PROJECTS\XLS\XLSTEST.OBJ

Library path is set correctly. Other calls to XLS functions work. Any suggestions would be appreciated.

[larsa]

Hello

The C++ preprocessor replaces the GetNumberFormat method with GetNumberFormatA. Right now there is no solution to this.


Lars Arvidsson

[larry_bar56]

Hello

The C++ preprocessor replaces the GetNumberFormat method with GetNumberFormatA. Right now there is no solution to this.


Lars Arvidsson

Why does the preprocessor do that? Is this a name mangling issue? I searched every .hpp file for any reference to GetNumberFormatA and found none. So, I believe you when you say the preprocessor is doing this, but why is that name not found in any library or object module? Plus, this is not true for SetNumberFormat which seems to work just fine. This seems very odd.

Larry

[larsa]

Hello

The name GetNumberFormat is #DEFINED in a windows api file (don't remember which), and replaced with GetNumberFormatA.


Lars Arvidsson

[larry_bar56]

Hello

The name GetNumberFormat is #DEFINED in a windows api file (don't remember which), and replaced with GetNumberFormatA.


Lars Arvidsson

Thanks! That allowed me to find a work around. I'll publish it here so others can use it as well. The file that defines GetNumberFormat is winnls.h (at least that's what I found with Borland C++ Builder 6). My application is not making use of anything from that header file (if you are using it, then this won't work for you).

My source file is named XLSTest.cpp and has a corresponding header file XLSTest.h. In the .h file I added preprocessor directives to undefine the GetNumberFormat. This has to go before the inclusion of XLSReadWriteII2.hpp. However, when you insert this code, Borland wants to then reinsert the XLSReadWriteII2 header file as XLSReadWriteII2.h (notice, not .HPP!) I couldn't figure out how to prevent this, so I just created an empty XLSReadWriteII2.h file in my project's directory and rebuilt my project. Now I can use the NumberFormat property of the cell in my code.

It's not pretty, but it works.

Here's what my XLSTest.h file looks like:

#include "XLSReadWriteII2.h" // Empty file to satisfy compiler
#ifdef GetNumberFormat
#undef GetNumberFormat
#endif
#include "XLSReadWriteII2.hpp" // Real XLSRW2 header file


- Larry