[andythepandy]

Hi again,

I I am having problems putting values into a MessageBox and in fact all text in my project.

LPSTR test = "Hi";
	MessageBox(NULL, (LPCWSTR)test, L"FPS", MB_OK);

The MessageBox that appears contains one, what look like Chinese, character.

I get the same behaviour when drawing text using D3DXDrawTextA()

Thanks for any help

[midders]

Modern C/C++ projects tend to use wide characters and character strings by default. In your call to Messagebox you are casting a narrow string (LPCSTR) to a wide string (LPCWSTR) which tends to produce garbage. Try using the TCHAR macros which compile to wide or narrow depending on the compiler options.

TCHAR *test=_T("Hi there!");
... (LPCWSTR)test

Slainte

midders

[andythepandy]

Ah! Excellent, it works!

Thanks very much

[andythepandy]

Another question.
My original code was:

LPSTR str;
str = "";
sprintf(str, "%d", m_FPS);
MessageBox(NULL, (LPCWSTR)str, L"FPS", MB_OK);

When this started return Chinese characters I changed it to:

LPSTR test = "Hi";
MessageBox(NULL, (LPCWSTR)test, L"FPS", MB_OK);

to test it. How do I implement TCHAR* into sprintf, because it only takes char* as parameter 1?

Thanks

[midders]

When you run into this sort of problem, I would suggest using wide strings throughout your entire project, to avoid confusion. There are wide versions of all the standard C functions such as sprintf (_stprintf) etc.

If you do need to convert between wide and narrow strings then it is as simple as:

// TCHAR helper funcs
// note that these funcs each use a single internal buffer, so the string is only valid until the next call to
// the function; for this reason you should not pass the return value to other user functions unless you
// are absolutely sure that they don't use the function themsleves
// recommended usage: strcpy(szDest,T2c(tszSrc));
// _tcscpy(tszDest,c2T(szSrc));
TCHAR *c2T(char *cstr)
{
    int i=0;
    static TCHAR tstr[MAX_BUF];
    while (tstr[i]=(TCHAR)cstr[i++]);
    return tstr;
} // c2T
char *T2c(TCHAR *tstr)
{
    int i=0;
    static char cstr[MAX_BUF];
    while (cstr[i]=(char)tstr[i++]);
    return cstr;
} // T2c

[andythepandy]

Ok, I'm having some annoying problems...

I have a function to get the FPS, GetFPS(), which returns a float value;

I currently have:

char Text[40] = "";
float Num = GameTimer->GetFPS();
sprintf(Text, "%d", Num);
int i=0;
static TCHAR tstr[40];
while (tstr[i]=(TCHAR)Text[i++]);
MessageBox(NULL, (LPCWSTR)tstr, L"HI", MB_OK);

The MessageBox displays 0 where the actual value is 80.9.

I tried _stprintf also:

wchar_t* Text;
Text = _T("");
float Num = GameTimer->GetFPS();
_stprintf(Text, _T("%d"), Num);
MessageBox(NULL, (LPCWSTR)Text, L"HI", MB_OK);

which kicks out the error:

Unhandled exception at 0x5a283abe (msvcr90d.dll) in CompleteGameEngine.exe: 0xC0000005: Access violation writing location 0x00f6999c.

Arghhh!!

Thanks