Reporting formatted errors

So, you want to report errors in a printf / sprintf way? Check this out...

PLAIN TEXT
C++:
1. #include <stdarg.h>
2. //-----blah blah
3.  
4. void __fastcall TForm1::Button1Click(TObject *Sender)
5. {
6.    AnsiString filename="c:\\mytestfile.txt";
7.  
8.    if (!FileExists(filename))
9.     ShowError("Cannot open file %s",filename.c_str());
10. }
11.  
12.  
13. void __cdecl TForm1::ShowError(const char *format, ...)
14. {
15.   va_list args;
16.  
17.   va_start(args,format);
18.  
19.   AnsiString Buf="";
20.   Buf.vprintf(format,args);
21.   va_end(args);
22.  
23.   Application->MessageBoxA(Buf.c_str(),"ERROR",MB_OK | MB_ICONERROR);
24. }

ps: don't forget to declare void __cdecl TForm1::ShowError(const char *format, ...) in your TForm class

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Author: Raz | On June 14th, 2007 | C++ Builder, [ En ] | No Comments

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