Hello, I'm Reading the Book "Advanced 3d Programming with DirectX 9.0" by Peter Walsh Im having trouble with a Error Class explained in the Book. class cGameError { private: string m_errorText; public: cGameError(char* errorText) { DP1("***\n***[ERROR]cGameError thrown! text:[%s]\n***\n",errorText); m_errorText = std::string(errorText); } const char* getText() { return m_errorText.c_str(); } }; Where does that DP1 function come from ? And what's that DP1("***\n***[ERROR]cGameError thrown! text:[%s]\n***\n",errorText) ?

I don't know where it is defined but it probably means: display text at debug level one.

And it probably looks something like:

#include <stdio.h>#include <stdarg.h>void DP1(const char *format, ...){#if DEBUG_LEVEL >= 1  va_list args;  va_start(args, format);  vfprintf(stderr, format, args);  va_end(args);#endif}

Thx for your Help.
By the Way, its a Windows Application. Could I use a Message Box ?

cGameError(char* errorText)
{
MessageBox(hWnd,errorText,"Error",MB_OK);
}



instead of :

cGameError(char* errorText)
{
DP1("***\n***[ERROR]cGameError thrown! text:[%s]\n***\n",errorText);
m_errorText = std::string(errorText);
}