字符串： 怎样在ANSI 和 UNICODE间做转换

字符串： 怎样在ANSI 和 UNICODE间做转换

问题: 怎样在ANSI 和 UNICODE间做转换？

答案:

这个答案启发自 Yves M贴出的一张回复（reply）

ANSI 到 UNICODE:

这个转换用函数MultiByteToWideChar()完成

代码:

--------------------------------------------------------------------------------

char *ansistr = "Hello";

int a = lstrlenA(ansistr)+1;

BSTR unicodestr = SysAllocStringLen(NULL, 2*a);

MultiByteToWideChar(CP_ACP, 0, ansistr, a, unicodestr, a);

AfxMessageBox(CString(unicodestr), MB_OK, 0); //displays "Hello"

//... when done, free the BSTR

SysFreeString(unicodestr);

--------------------------------------------------------------------------------

UNICODE 到 ANSI:

UNICODE大多数情况下被OLE函数返回， 像这个

代码:

--------------------------------------------------------------------------------

HRESULT SomeOLEFunction(BSTR &bstr)

{

bstr = ::SysAllocString(L"Hello");

return S_OK;

}

--------------------------------------------------------------------------------

这个转换用WideCharToMultiByte()函数完成

代码:

--------------------------------------------------------------------------------

BSTR unicodestr;

SomeOLEFunction(unicodestr);

int a = SysStringLen(unicodestr)+1;

char *ansistr = new char[a];

WideCharToMultiByte(CP_ACP,

0,

unicodestr,

-1,

ansistr,

a,

NULL,

NULL);

AfxMessageBox(ansistr, MB_OK, 0); // will display "Hello"

//...use the strings, then free their memory:

delete[] ansistr;

SysFreeString(unicodestr);

--------------------------------------------------------------------------------