SAS9.2帮助很好很强大

一直觉得SAS得帮助做的很棒，想不到9.2考虑得更加完善

居然提供了一个Learning to Use SAS 这个帮助，很完善得例子，把SAS得每个模块都讲了，非常多，并且有详细得例子，例子看起来也特别简单易懂

如图：

大家把例子全部过一遍，基本上就把SAS得功能全部走一遍了

很好

如下一个调用外部DLL函数的例子：

/****************************************************************/
/*          S A S   S A M P L E   L I B R A R Y                 */
/*                                                              */
/*    NAME: EXDLL1                                              */
/*   TITLE: External DLL Example 1 : Calling Functions within +*/
/*          External DLLs from the DATA Step                    */
/* PRODUCT: SAS                                                 */
/* SYSTEM: Windows                                             */
/*    KEYS: MODULE                                              */
/*   PROCS:                                                     */
/*    DATA:                                                     */
/*     REF:                                                     */
/*    MISC:                                                     */
/*    DESC: Demonstrates how to use the SAS System's MODULE     */
/*          functions/call routines to utilize both API and     */
/*          user-written functions located within Dynamic Link */
/*          Libraries (DLLs). In this example, the Windows API */
/*          function "MessageBoxA" is being called to display   */
/*          a dialog box with message text and 2 push buttons. */
/****************************************************************/

/* Assign the MODULE routine specific fileref "SASCBTBL".       */
/* This fileref points to an attribute table definition table   */
/* used to describe the parameters and responses for each       */
/* function, the name of the DLL they are located in, and their */
/* architecture. There must be an entry in this table for each */
/* function called by the MODULE routine. In this example we   */
/* are creating a temporary work file utilizing the CATALOG     */
/* access method (new to 6.11).                                 */

FILENAME SASCBTBL CATALOG "work.temp.attrfile.source";

/* This DATA step dynamically creates an attribute table to     */
/* define the MessageBoxA API function used in the example      */
/* code below. NOTE: Using an incorrect attribute definition   */
/* could abnormally terminate your SAS session or, even worse, */
/* halt your operating system. CAUTION IS ADVISED!!            */

DATA _NULL_;
    FILE SASCBTBL;

    PUT "ROUTINE MessageBoxA";
    PUT "    MINARG=4";
    PUT "    MAXARG=4";
    PUT "    STACKPOP=CALLED";
    PUT "    MODULE=USER32";
    PUT "    RETURNS=LONG;";
    PUT " ARG 1 NUM BYVALUE FORMAT=PIB4.;";
    PUT " ARG 2 CHAR         FORMAT=$CSTR200.;";
    PUT " ARG 3 CHAR         FORMAT=$CSTR200.;";
    PUT " ARG 4 NUM BYVALUE FORMAT=PIB4.;";
RUN;

/*--------------------------------------------------------------*/
/* The following SAS macro variables are defined to simplify    */
/* the specification of the parameters to the MessageBoxA       */
/* function.                                                    */
/*--------------------------------------------------------------*/
/*   Buttons or Button Groups                                   */
%LET MBOK     = 0;     /* [OK] - Default                        */
%LET MBOKCAN = 1;     /* [OK] [Cancel]                        */
%LET MBABREIG = 2;     /* [Abort] [Retry] [Ignore]            */
%LET MBYENOCA = 3;     /* [Yes] [No] [Cancel]                 */
%LET MBYESNO = 4;     /* [Yes] [No]                           */
%LET MBRETCAN = 5;     /* [Retry] [Cancel]                     */
/*   Icons                                                      */
%LET MBNOICON = 0;     /* No icon - Default                     */
%LET MBISTOP = 16;     /* A 'STOP' icon                         */
%LET MBIQUEST = 32;    /* A question mark icon                  */
%LET MBIEXCLA = 48;    /* An exclamation mark icon              */
%LET MBIINFOR = 64;    /* An information 'i' icon               */
/*   Default Button                                             */
%LET MBDEFB1 = 0;     /* 1st button is the default - Default   */
%LET MBDEFB2 = 256;   /* 2nd button is the default             */
%LET MBDEFB3 = 512;   /* 3rd button is the default             */
/*   Response Codes (NOTE: These indicate the button selected) */
%LET MBIDOK   = 1;     /* [OK] was selected                     */
%LET MBIDCAN = 2;     /* [Cancel] was selected                 */
%LET MBIDABO = 3;     /* [Abort] was selected                  */
%LET MBIDRET = 4;     /* [Retry] was selected                  */
%LET MBIDIGN = 5;     /* [Ignore] was selected                 */
%LET MBIDYES = 6;     /* [Yes] was selected                    */
%LET MBIDNO   = 7;     /* [No] was selected                     */
%LET MBIDERR = 0;     /* An API error occurred (check params) */
/*--------------------------------------------------------------*/
/* MessageBoxA PARAMETERS AND RETURN CODES:                     */
/* Usage:                                                       */
/*   Response = MessageBoxA(0, Message, Caption, Style)         */
/*                                                              */
/* Response - The value returned from the function indicating   */
/*            what action the user took (see Response Codes     */
/*            above).                                           */
/* Message - The text to appear in the body of the dialog.     */
/* Caption - Text to be used in for the dialog's caption.      */
/* Style    - A number indicating features required in the      */
/*            dialog box (icons and buttons). The number is    */
/*            derived by adding one value from each of the      */
/*            first 3 sections above (Buttons or Button Groups, */
/*            Icons and Default Button) together.               */
/*--------------------------------------------------------------*/

/* Use the MODULE interface to call the MessageBoxA function.   */

DATA _NULL_;
     response = MODULEN("MessageBoxA", 0,
   "This is the text that appears as the dialog message.",
   "THIS IS THE CAPTION TEXT",
   &MBOKCAN + &MBIINFOR + &MBDEFB1);

     SELECT (response);
WHEN (&MBIDOK)
      PUT "The [OK] button was selected.";
WHEN (&MBIDCAN)
      PUT "The [CANCEL] button was selected.";
WHEN (&MBIDERR)
      PUT "An ERROR condition occurred." /
   "Check the MessageBoxA parameters.";
OTHERWISE
      PUT "An unexpected response code of" response
   " was returned.";
     END;
RUN;

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