Get number of columns in C++ with _bstr_t and ADO

Question

I am using Visual Studio 2008, and SQL Server, Currently I have a connection using ADO, but would like to retrieve the number of columns a table has...

Here is what I have

/*CODE FOR connecting to database**/

/*query to know number of columns in table*/
_bstr_t sSQLd="Select Count(*) From INFORMATION_SCHEMA.COLUMNS Where TABLE_NAME='[dbo].[mytable]';";


/*define variable to hold number of columns and 
print number of coulms as an integer
*/
int COLS_PER_ROW = wcstod(sSQLd, NULL);
printf("COLS_PER_ROW: %d", COLS_PER_ROW);

It prints 0 although There are 20 columns in my table How do I fix the query or the logic??

Answer 1

I think the examples in this MSDN article will help: How to: Convert Between Various String Types

Quoting from the article:

The strings types that are covered include char *, wchar_t*, _bstr_t, CComBSTR, CString, basic_string, and System.String.

Convert from _bstr_t to wchar_t* or char* and then use strtol()/wcstol() to convert it to long.