How do you convert Bstr to CString?

How do you convert Bstr to CString?

You can just assign the string this way: csError = bstrErr. GetBSTR(); Or use the constructor CString csError( bstrErr.

What is a Bstr?

A BSTR (Basic string or binary string) is a string data type that is used by COM, Automation, and Interop functions. Use the BSTR data type in all interfaces that will be accessed from script.

What is Lpctstr?

An LPCSTR is a 32-bit pointer to a constant null-terminated string of 8-bit Windows (ANSI) characters.

What is a TCHAR?

TCHAR is simply a macro that expands to char in ANSI builds (i.e. _UNICODE is not defined) and wchar_t in Unicode builds ( _UNICODE is defined). There are various string types based on the TCHAR macro, such as LPCTSTR (long pointer to a constant TCHAR string).

How do you initialize a Bstr variable?

RE: Initialize a BSTR BSTR str = L”my string”; invokes the = operator for the BSTR class and calls the correct function to allocate memory and store the string in it with the length prepended.

Can Bstr be null?

Yes – a NULL BSTR is the same as an empty one.

What is Lpctstr in C++ MSDN?

LPCTSTR is a pointer to a const TCHAR string, ( TCHAR being either a wide char or char depending on whether UNICODE is defined in your project) LPTSTR is a pointer to a (non-const) TCHAR string.

What is Lpcstr in C?

The LPCSTR is the (Long Pointer to Constant STRing). It is basically the string like C. So by converting string to character array we can get LPCSTR. This LPCSTR is Microsoft defined.

Should I use Tchar?

The answer is, that you should use TCHAR if you plan to target Windows 98. If not, then you should use TCHAR . The hope that you might get UTF-8 support for free in the future is wishful thinking. Windows will never support UTF-8 through the same A/W mechanism as ANSI and Unicode.

How do you assign a value to Bstr?

Re: assign a value to BSTR type variable Assign(“hello”); BSTR bstrnewname; bstrnewname = SysAllocString((BSTR) bstrname);

How do you initialize variant?

Initializes a variant.

1. Syntax. C++ Copy. void VariantInit( [out] VARIANTARG *pvarg );
2. Parameters. [out] pvarg. The variant to initialize.
3. Return value. None.
4. Remarks. The VariantInit function initializes the VARIANTARG by setting the vt field to VT_EMPTY.
5. Requirements. Target Platform.
6. See also. Variant Manipulation Functions.