I'm receiving following error:
Debug Assertion Failed!
Expression: string iterators incompatible
When trying to run such a code:
std::string string_Dir(){return ".\\Dir\\";}
std::wstring wstring_Dir=std::wstring(
string_Dir().begin()
,string_Dir().end()
);
SetDllDirectory(wstring_Dir.c_str());
Does someone know why
BTW: I followed this.
You are calling string_Dir() twice and then using iterators from different std::string objects to initialize your std::wstring. That is why you are getting an incompatibility error. You must use iterators from the same std::string object, so call string_Dir() once and assign the return value to a variable:
std::string dir = string_Dir();
std::wstring wstring_Dir(dir.begin(), dir.end());
SetDllDirectory(wstring_Dir.c_str());
// or better: SetDllDirectoryW(wstring_Dir.c_str());
That being said, you are not converting from ANSI to UTF-16, so this code will only work correctly if string_Dir() returns a std::string that contains only 7bit ASCII characters. It will fail if the std::string contains any non-ASCII 8bit characters.
There is a simpler solution - you can call SetDllDirectoryA() instead. You don't need the std::wstring, and the OS can do the ANSI-to-UTF16 conversion for you:
SetDllDirectoryA(string_Dir().c_str());
According to the documentation, the value in the function call is supposed to be LPCTSTR instead of LPCTWSTR.
#ifdef UNICODE #define SetDllDirectory SetDllDirectoryW
SetDllDirectoryWinstead of SetDllDirectory
UNICODE is defined, SetDllDirectory() maps to SetDllDirectoryW(). But since std::wstring is being used, it is better to call SetDllDirectoryW() directly and not rely on TCHAR mapping at all.
string!=wstring, becausechar!=wchar_t.