Hi!

>In FoxTalk was described methods of creatiung DSN in the code, I like also to delete some dsn
>My help to win32api does not have description to sqlconfig and rest of functions from odbc32.dll

You can delete DSN using SQLConfigDataSource with ODBC_REMOVE_DSN or ODBC_REMOVE_SYS_DSN request. Here a C description:
// SQLConfigDataSource request flags
#define ODBC_ADD_DSN 1 // Add data source
#define ODBC_CONFIG_DSN 2 // Configure (edit) data source
#define ODBC_REMOVE_DSN 3 // Remove data source
#define ODBC_ADD_SYS_DSN 4 // add a system DSN
#define ODBC_CONFIG_SYS_DSN 5 // Configure a system DSN
#define ODBC_REMOVE_SYS_DSN 6 // remove a system DSN
#define ODBC_REMOVE_DEFAULT_DSN 7 // remove the default DSN

BOOL INSTAPI SQLConfigDataSource (HWND hwndParent,
WORD fRequest,
LPCSTR lpszDriver,
LPCSTR lpszAttributes);

Also take a look on McCasland's ODBC_DSN class in download section.

Alexander