Windows.h with SQLite visual c++ error - winapi

Question

I have just started windows application programming 2 days ago.. I am using VC++ and it is having some issues which I am unable to figure out.
When i send proper arguments to the function below, it displays everything properly but it doesn't save the insert query to the DB.
Here is the statement:
INSERT INTO BOOKS(ID,USERNAME,ISSUER,RETURNED) VALUES(1,'xyz','xyz',0);
Here is the table creation statement of sqlite:
sql = "CREATE TABLE IF NOT EXISTS BOOKS(" \
"ID INT PRIMARY KEY NOT NULL," \
"BOOKNAME TEXT NOT NULL," \
"ISSUER TEXT NOT NULL," \
"RETURNED INT);";
Here is the function:
using namespace std;
int WriteToDB(sqlite3 *,const char [],wchar_t *,HWND *);
int WriteToDB(sqlite3 *_db,const char _query[],wchar_t *ermsg,HWND *hw)
{
sqlite3_stmt *insertStmt;
MessageBox(*hw,L"Creating insert statement",L"INFO",MB_OK);
if(sqlite3_prepare(_db, _query, 400,&insertStmt, NULL))
MessageBox(*hw,L"Prepared!",L"Info",MB_OK);
MessageBox(*hw,L"Stepping into insert statement",L"INFO",MB_OK);
MessageBox(*hw,(LPWSTR)_query,L"Input",MB_OK);
if (sqlite3_step(insertStmt) != SQLITE_DONE)
{
wcscpy(ermsg,CharToWChar("Didn't Insert Item! Please check statement or DataBase!!"));
return 0;
}
sqlite3_finalize(insertStmt);
return 1;
}
EDIT: Here is the new error i got:
In SQLite,
near "I": Syntax Error
This Statement:
INSERT INTO BOOKS(ID,BOOKNAME,ISSUER,RETURNED) VALUES(1,'xyz','xyz',0);

Answer 1

Mistake here:
if(sqlite3_prepare(_db, _query, 400,&insertStmt, NULL)) //...
Should be:
if(sqlite3_prepare(_db, _query, 400,&insertStmt, NULL)==SQLITE_OK) //...
Because #define SQLITE_OK 0 /* Successful result */, your previous condition was opposite to pretended one.
Advice: instead of merging data in SQL statement, consider using parameters and sqlite3_bind_* interfaces.
EDIT:
Using sqlite3_prepare_v2 is recommended over sqlite3_prepare. Using such, you can easily have information on error cause with sqlite3_errmsg:
if(sqlite3_prepare(_db, _query, 400,&insertStmt, NULL) == SQLITE_OK) {
MessageBox(*hw,L"Prepared!",L"Info",MB_OK);
} else {
MessageBox(*hw, sqlite3_errmsg16(_db), L"Error", MB_OK);
}