Are you sure that the call requires the string to be null terminated? I
do not know that winapi function, but this might work:
bool test(HDC dc, string str, SIZE* s)
{
auto wstr = to!(wchar[])str;
GetTextExtentPoint32W(dc, wstr.ptr, wstr.length, s);
...
It doesn't need to be null-terminated for that function. Shouldn't you use to!wstring though?!
