Convert BSTR to lpstr

Method 1: Use convertbstrtostring. For example:

# Include
# Pragma comment (Lib, "comsupp. lib ")
Int _ tmain (INT argc, _ tchar * argv []) {
BSTR bstrtext =: sysallocstring (L "test ");
Char * lpsztext2 = _ com_util: convertbstrtostring (bstrtext );
Sysfreestring (bstrtext); // release after use
Delete [] lpsztext2;
Return 0;
}

Method 2: Use the _ bstr_t value assignment operator to overload. For example:

_ Bstr_t B = bstrtext;
Char * lpsztext2 = B;

Char * To BSTR

Method 1: Use API functions such as sysallocstring. For example:

BSTR bstrtext =: sysallocstring (L "test ");
BSTR bstrtext =: sysallocstringlen (L "test", 4 );
BSTR bstrtext =: sysallocstringbytelen ("test", 4 );

Method 2: Use colevariant or _ variant_t. For example:

// Colevariant strvar ("this is a test ");
_ Variant_t strvar ("this is a test ");
BSTR bstrtext = strvar. bstrval;

Method 3: Use _ bstr_t, which is the simplest method. For example:

BSTR bstrtext = _ bstr_t ("this is a test ");

Method 4: Use ccombstr. For example:

BSTR bstrtext = ccombstr ("this is a test ");

Or

Ccombstr BSTR ("this is a test ");
BSTR bstrtext = BSTR. m_str;

Method 5: Use convertstringtobstr. For example:

Char * lpsztext = "test ";
BSTR bstrtext = _ com_util: convertstringtobstr (lpsztext); Method 1: Use convertbstrtostring. For example:

# Include
# Pragma comment (Lib, "comsupp. lib ")
Int _ tmain (INT argc, _ tchar * argv []) {
BSTR bstrtext =: sysallocstring (L "test ");
Char * lpsztext2 = _ com_util: convertbstrtostring (bstrtext );
Sysfreestring (bstrtext); // release after use
Delete [] lpsztext2;
Return 0;
}

Method 2: Use the _ bstr_t value assignment operator to overload. For example:

_ Bstr_t B = bstrtext;
Char * lpsztext2 = B;

Char * To BSTR

Method 1: Use API functions such as sysallocstring. For example:

BSTR bstrtext =: sysallocstring (L "test ");
BSTR bstrtext =: sysallocstringlen (L "test", 4 );
BSTR bstrtext =: sysallocstringbytelen ("test", 4 );

Method 2: Use colevariant or _ variant_t. For example:

// Colevariant strvar ("this is a test ");
_ Variant_t strvar ("this is a test ");
BSTR bstrtext = strvar. bstrval;

Method 3: Use _ bstr_t, which is the simplest method. For example:

BSTR bstrtext = _ bstr_t ("this is a test ");

Method 4: Use ccombstr. For example:

BSTR bstrtext = ccombstr ("this is a test ");

Or

Ccombstr BSTR ("this is a test ");
BSTR bstrtext = BSTR. m_str;

Method 5: Use convertstringtobstr. For example:

Char * lpsztext = "test ";
BSTR bstrtext = _ com_util: convertstringtobstr (lpsztext );