const wchar_t* and QString Problem

[pixbyte]

I use an external DLL where I have to pass a parameter file.lpszSourceFilePath (const wchar_t*). If I use
file.lpszSourceFilePath = L"C:\Users\ogni\Documents\video\early.ac3";
then everything works well.
But if I use a QString (from Filedialog) the parameter I pass seems to be wrong. Looks like a complete filename (_instead of /)
I tried different way, also like to convert it with

wchar_t* convertToFoxValue(QString strValue)
{

    wchar_t *pass;
    pass = (wchar_t*) malloc (sizeof(wchar_t)*strValue.size()+1);
    //pass = new wchar_t[strValue.size() + 1];
    strValue.toWCharArray(pass);
    //pass[strValue.length()]=0; // Null terminate the string
    pass[strValue.size()]=L'\0';

    return pass;
}

But also this do not work. Cast the QString to utf16() also do not work. Just the plain text with L"....:" works, no variable.

Anyone have a idea what there is wrong?

[mpergand]

Windows uses backslash (\) as separator. Qt uses the unix separator (/)
Have a try with:
[static] QString QDir::toNativeSeparators(const QString &pathName)

[aha_1980]

@pixbyte

In addition to what mpergand suggested, if you only need a read-only access to the path (like const wchar_t * suggests), you can use QString::utf16() and a cast to wchar_t and therefore avoid the additional allocation and copy. Please note, that this is a Windows-only thing, as wchar_t can be 4 byte on Unix.

Regards