Adventures of a Geek various programming related articles

How to convert between ANSI and UNICODE strings?

Useful C++ code for converting between ANSI an UNICODE strings:

Ansi to Unicode:

char *ansistr = "Hello";
int a = lstrlenA(ansistr);
BSTR unicodestr = SysAllocStringLen(NULL, a);
::MultiByteToWideChar(CP_ACP, 0, ansistr, a, unicodestr, a);
::SysFreeString(unicodestr);

Unicode to Ansi:

BSTR unicodestr = 0;
SomeCOMFunction(&unicodestr);
int a = SysStringLen(unicodestr)+1;
char *ansistr = new char[a];
::WideCharToMultiByte(CP_ACP,
                        0,
                        unicodestr,
                        -1,
                        ansistr,
                        a,
                        NULL,
                        NULL);
delete[] ansistr;
::SysFreeString(unicodestr);